Track • Train • Thrive

Health Calculators

Estimate macros, track progress, and plan routines with calculators built for everyday wellness — from fitness benchmarks to nutrition and recovery.

All health calculators

Browse every wellness tool on AgentCalc, then pin the ones you want to revisit during your routine.

View saved

Focused topic hubs

Use these crawlable subcategory pages to jump into the most coherent clusters within this category.

Explore 110 Health calculators

Browse all 110 health calculators in plain HTML for easier crawling and direct navigation.

3D Printer Resin Post-Cure Dose Calculator (UV Exposure Time & Rotations)

Calculate UV post-cure exposure time and turntable rotations from a resin’s target dose (J/cm²), measured intensity (mW/cm²), coverage, and thermal limits.

3D Printer Resin Post-Cure Dose Calculator (UV Exposure Time & Rotations) health calculator DLP FAQ HDT

A1C to Average Glucose Converter | HbA1c eAG Calculator

Convert HbA1c to estimated average glucose, or average glucose back to A1C, using the ADAG relationship. Learn how to read the result and when it can mislead.

A1C to Average Glucose Converter | HbA1c eAG Calculator health calculator 1 mmol ADAG CGM

Absolute Neutrophil Count Calculator | ANC Formula, Ranges, and Infection Risk Guide

Calculate absolute neutrophil count (ANC) from a CBC differential, review the ANC formula, understand normal and low ranges, and learn how to interpret infection-risk categories.

ANC calculator absolute neutrophil count neutropenia CBC differential infection risk

Adult Blood Volume Calculator Using the Nadler Formula

Calculate an adult's estimated circulating blood volume in liters and milliliters with the sex-specific Nadler formula using height in cm and weight in kg.

blood volume calculator nadler formula total blood volume circulating blood adult

Adult eGFR Calculator Using the 2021 CKD-EPI Creatinine Equation

Estimate adult kidney filtration (eGFR) with the 2021 CKD-EPI race-free creatinine equation using age, serum creatinine, and sex; educational use only.

eGFR calculator kidney function estimator CKD-EPI 1.73 m² for at least three months CKD

Antidepressant Taper Schedule Calculator - Step-Down Planner

Sketch a gradual antidepressant step-down plan from current dose, goal dose, duration, and interval - a draft schedule to review with your prescriber.

antidepressant taper schedule calculator psychiatry dose reduction medication taper planner 10% of the current dose per step 10–60 mg for some SSRIs

Apnea Training Hold-Time Safety Margin Calculator

Estimate conservative breath-hold training limits from your personal best, experience level, apnea type, and supervision setting, with essential apnea safety reminders.

apnea training breath holding static apnea hypoxia hypercapnia

Army Combat Fitness Test (ACFT) Score Calculator

Estimate your Army Combat Fitness Test (ACFT) score from six event performances. See per-event points, total score, and pass/fail based on 60-point minimums.

ACFT calculator Army combat fitness test score military fitness 0–59 seconds 1110 seconds

Asbestos Fiber Exposure Calculator – Estimate Cumulative Fiber-Year...

Use this asbestos exposure calculator to estimate cumulative dose in fiber-years from concentration, hours, days, and years. For educational purposes only; n...

asbestos exposure calculator fiber years mesothelioma risk 240 days per year 8 hours per day

ASCVD 10-Year Risk Estimate Calculator for Cholesterol, Blood Pressure, Smoking, and Diabetes

Estimate a simplified educational 10-year ASCVD risk from age, cholesterol, HDL, systolic blood pressure, smoking, and diabetes. This is not an official clinical score.

ASCVD risk calculator 10-year heart disease risk cardiovascular risk estimator ASCVD HDL

ASRS ADHD Score Calculator | Adult ADHD Self-Report Scale

Use the ASRS ADHD score calculator to total the six screening items, count frequent responses, and read the result as a conversation starter with a clinician.

ASRS ADHD self assessment adult ADHD questionnaire ADHD clinician

AUDIT Alcohol Use Disorder Score Calculator

Calculate your AUDIT alcohol use disorder score from the 10 WHO questions, screen your drinking risk level, and learn what the result means. Not a diagnosis.

AUDIT score calculator alcohol use disorder test drinking risk assessment AUDIT CAGE

Bacon Calories, Exercise Miles, and Weekly Cost Calculator

Estimate weekly bacon calories, the running miles needed to burn them, optional bacon spending, and the calculator's intake-level label.

bacon calculator bacon calories bacon health effects bacon consumption calculator exercise offset bacon

Badminton Court Setup Cost Calculator | Build-Out, Equipment, and Operating Budget

Estimate badminton court build-out costs, equipment purchases, staffing, and ongoing operating expenses for a club or tournament venue. Compare court surfaces, seating, and payback timing.

badminton court cost facility setup tournament planning badminton equipment court construction

Basic Reproduction Number Calculator - Estimate Disease Spread

Calculate the basic reproduction number (R0) for an infectious disease using contact rate, transmission probability, and infectious period.

R0 calculator epidemiology reproduction number disease spread basic calculate

Benzene Exposure Risk Calculator - Estimate Daily Inhalation Dose

Estimate benzene inhalation dose and hazard quotient from air concentration, breathing rate, exposure time, and body weight.

benzene exposure calculator inhalation dose hazard quotient air air concentration

Blood Donation Eligibility Calculator - Can You Donate?

Check basic whole blood donation eligibility using age, weight, hemoglobin (g/dL), and weeks since your last donation. Includes criteria, formula notes, and an example.

blood donation eligibility calculator donate blood requirements hemoglobin check 56 days HIV

Blood Sugar Converter (Glucose): mg/dL ↔ mmol/L

Convert glucose between mg/dL and mmol/L with accurate rounding. Includes formulas, worked examples, and a quick common conversions table.

blood sugar converter glucose units mg/dL to mmol/L mmol to mg/dL diabetes tool

Blood Type Compatibility Calculator - Safe Transfusion Checker

Check whether donor and recipient blood types are compatible for transfusion using ABO and Rh rules, with a full compatibility matrix and universal donor guidance.

blood type compatibility calculator transfusion match ABO Rh universal donor A is on A's allowed list

Blue Light Melatonin Suppression Calculator (Screen Brightness & Time)

Estimate melatonin suppression from evening screen exposure using brightness (lux), viewing time (minutes), and blue-light filter reduction. Includes formula, examples, and practical guidance.

blue light calculator melatonin suppression screen exposure lux circadian rhythm

Body Frame Size Calculator | Compare Height and Wrist Circumference

Compare height and wrist circumference to estimate a small, medium, or large body frame with male or female threshold sets, measurement tips, ratio guidance, and an optional mini-game.

body frame size calculator wrist circumference small medium large frame height wrist ratio BMI

Body Surface Area (BSA) Calculator (Mosteller & Du Bois)

Estimate body surface area (BSA) using the Mosteller or Du Bois formula. Enter height and weight in metric or imperial units, and optionally calculate a dose in mg/m².

body surface area calculator BSA calculator Mosteller formula Du Bois formula mg/m2 dosing

Body Type Calculator – Estimate Your Somatotype Tendencies

Estimate your somatotype tendency from height, wrist circumference, shoulder shape, perceived weight-gain pattern, and natural build.

body type calculator somatotype ectomorph mesomorph endomorph

Boxing Calories Burned Calculator: MET Estimate for Training Sessions

Estimate calories burned during boxing sessions—from bag work and pad drills to sparring and competition-style rounds—using METs, body weight, and duration.

boxing calorie calculator boxing energy expenditure sparring calories 12 MET 5.5 MET

Caffeine Tapering Schedule Calculator | Day-by-Day Reduction Plan

Plan a gradual caffeine cut by entering your current intake, target intake, and taper length to generate a day-by-day schedule in milligrams.

caffeine taper calculator coffee withdrawal plan reduce caffeine gradually C 0 - d × i caffeine

Cardiac Output Calculator - Estimate Heart Pumping Capacity

Determine cardiac output in liters per minute from heart rate and stroke volume, review worked examples, and explore related heart health calculators.

cardiac output calculator heart stroke volume cardiology MAP MRI

CGM vs. Fingerstick Cost Comparison Calculator

Compare continuous glucose monitor costs with fingerstick testing costs over any horizon, including sensors, transmitters, receivers, strips, lancets, and meter replacement.

continuous glucose monitor calculator CGM vs fingerstick cost $ per lancet $ per sensor $ per strip

Child Calorie Needs Calculator - Daily Energy Requirements

Estimate daily calorie needs for children ages 2–18 by age, sex, and activity level, using USDA Dietary Guidelines to help caregivers plan balanced meals and snacks.

child calorie needs kids calorie calculator daily calories for children activity age

Circadian Light Exposure Planner (Melanopic Lux & Phase Shift Estimate)

Plan morning and evening light exposure and estimate a simplified circadian phase shift using melanopic exposure (lux·min) and a melanopic ratio.

circadian light calculator melanopic lux phase shift estimator FAQ Melanopic Lux & Phase Shift Estimate

Contrast Agent Dosage Calculator for CT and Angiography | Estimate Iodinated Contrast Volume

Calculate iodinated contrast volume in milliliters from patient weight, iodine target in mg I/kg, and product concentration in mg I/mL for CT and angiography planning.

contrast agent dosage calculator CT contrast volume calculator radiology dosage planner iodinated contrast dose ACR

Corrected Calcium Calculator (Albumin Adjustment) | Payne Formula

Calculate corrected calcium (mg/dL) from measured serum calcium and albumin with the Payne formula, plus worked examples, interpretation ranges, and limitations.

corrected calcium calculator albumin adjustment serum calcium payne formula hypocalcemia

Creatinine Clearance Calculator | Cockcroft-Gault CrCl Estimate

Estimate creatinine clearance with the Cockcroft-Gault equation to support renal drug-dosing decisions.

creatinine clearance kidney function Cockcroft-Gault CKD CrCl

CVSS Vulnerability Score Calculator - Evaluate Security Risks

Calculate the CVSS v3 base score for security vulnerabilities by selecting metrics like attack vector, complexity, and impact.

cvss calculator vulnerability score security risk assessment 0.56 each CVE

Cycling Calorie Burn Calculator - Estimate Bike Ride Calories by Speed and Weight

Estimate calories burned on a bike ride using distance, ride time, average speed-based MET bands, and body weight in metric or imperial units.

cycling calorie calculator bike calories cycling energy expenditure calories burned biking cycling MET calculator

DASH Diet Sodium Planner | Meal-by-Meal Sodium Budget

Split a DASH daily sodium goal into meal-by-meal budgets, compare 1,500 mg and 2,300 mg targets, and use the result for label reading, recipe planning, and restaurant choices.

DASH diet sodium planner sodium calculator blood pressure healthy eating

Drug Steady-State Concentration Calculator (Pharmacokinetics)

Calculate blood concentration levels, steady-state plasma concentration, and accumulation factor for repeated drug dosing based on half-life.

pharmacokinetics calculator steady-state concentration half-life drug accumulation plasma concentration

Déjà Vu Frequency Estimator (Monthly) | Age, Sleep, Stress & Novelty

Estimate how often déjà vu experiences might occur each month using a simple model based on age, sleep habits, stress level, and exposure to novel environments.

deja vu calculator memory glitch frequency familiarity illusion 1 = very calm 10 = extremely stressed

Electric Toothbrush Head Replacement Planner | Estimate the Next Swap Date

Estimate when to replace an electric toothbrush head based on the last swap date, daily brushing frequency, and brushing pressure.

electric toothbrush head replacement toothbrush head timing oral care planner 1=light 3=heavy

Electric vs Manual Toothbrush Cost Calculator | Compare Long-Term Brush Spending

Compare long-term brushing costs for electric and manual toothbrushes by entering handle price, replacement-head cost, brush lifespan, and analysis period.

electric toothbrush cost calculator manual toothbrush comparison oral care budget toothbrush replacement cost analysis

Electric Wheelchair Charging Cost Calculator | Estimate Recharge Energy and Monthly Cost

Estimate how much it costs to recharge an electric wheelchair using battery voltage, amp-hours, charger efficiency, electricity rate, range per charge, and daily mileage.

electric wheelchair charging cost calculator wheelchair electricity cost mobility aid energy use USD account for charger efficiency

Elliptical Calorie Burn Calculator | RPM, Resistance, and Weight

Estimate elliptical workout calories from stride length, pedal RPM, resistance level, duration, and body weight, with calculated virtual speed and distance.

elliptical calorie calculator stride length resistance level cardio energy expenditure MET

Employee Turnover Rate Calculator (HR Attrition %)

Calculate employee turnover rate from start headcount, end headcount, and separations. Includes formula, example, and tips to interpret results.

employee turnover rate calculator attrition HR analytics retention HR Attrition %

Ergonomic Desk Height Calculator | Sitting and Standing

Estimate an ergonomic sitting or standing desk height from your body height, shown in inches and centimeters, as a starting point for a comfortable workstation.

ergonomic desk height calculator ideal desk height standing desk height sitting desk height office ergonomics

Eyeglass Prescription Power Impact Calculator - Vision Strength Analysis

Compare eyeglass prescription strengths across different lenses. Calculate effective optical power, visual acuity impact, and how prescription changes affect daily activities like driving, reading, and screen use.

eyeglass prescription calculator vision correction power diopter strength astigmatism sphere cylinder axis

Fallout Shelter Radiation Dose Calculator

Project cumulative radiation dose inside a shelter after nuclear fallout using initial intensity, protection factor, decay half-life, and stay duration.

fallout shelter radiation dose calculator nuclear preparedness tool after cumulative decay

FIB-4 Liver Fibrosis Calculator | Age, AST, ALT & Platelets

Calculate a FIB-4 score from age, AST, ALT, and platelet count to estimate liver fibrosis risk, with age-adjusted cutoffs, a worked example, and a visual risk gauge.

FIB4 calculator liver fibrosis score hepatitis risk AASLD ALT

Fluoride Intake Calculator for Water, Toothpaste, and Daily Sources

Use this fluoride intake calculator to estimate mg/day from drinking water, swallowed toothpaste, tea, supplements, and other common sources, then compare the total with age-based reference limits.

fluoride intake calculator fluoride exposure water fluoride toothpaste fluoride dental health calculator

Food Temperature Danger Zone Calculator - Estimate Safe Hold Time

Enter a food's internal temperature to estimate how long it can remain in the 40–140°F danger zone before refrigeration or reheating is needed.

food safety calculator temperature danger zone bacterial growth FDA FSIS

Formaldehyde Exposure Risk Calculator

Estimate daily inhaled dose of formaldehyde and compare it to reference dose guidance.

formaldehyde exposure calculator indoor air quality hazard quotient air concentration body weight

Greenhouse Ventilation Calculator | Size Fans by House Volume and ACH

Estimate greenhouse fan airflow from length, width, height, and air changes per hour so you can size exhaust fans, vents, and controls for crop conditions.

greenhouse ventilation calculator greenhouse fan size air changes per hour ACH CFM

Hand-Arm Vibration Exposure Calculator - Estimate A(8) from Multiple Tools

Estimate daily hand-arm vibration exposure A(8) from one or more tools, compare the result with common action and limit values, and see how trigger time and acceleration combine across a shift.

hand arm vibration exposure calculator vibration risk HAVS vibration exposure ISO

Health Insurance Plan Comparison Calculator for Premiums, Deductibles, Copays, and Out-of-Pocket Costs

Compare up to three health insurance plans by estimated annual cost. This calculator combines premiums, deductibles, copays, coinsurance, prescriptions, surgery assumptions, and out-of-pocket maximums for HMO, PPO, EPO, and HDHP options.

health insurance comparison health plan calculator HMO vs PPO healthcare cost calculator insurance plan comparison

Heat Index and Humidity Comfort Calculator | Feels-Like Temperature

Calculate the heat index from air temperature and relative humidity, account for activity level, review heat-risk categories, and get practical hot-weather safety guidance.

heat index calculator humidity comfort apparent temperature feels like temperature heat illness

Herd Immunity Vaccination Coverage Calculator

Determine the proportion of a population that must be vaccinated to achieve herd immunity given R0 and vaccine effectiveness.

herd immunity vaccination coverage calculator vaccine effectiveness CDC COVID SARS

HIIT Calorie Burn Calculator | Estimate Work and Recovery Interval Calories

Estimate calories burned in a HIIT workout by entering your body weight, interval count, work duration, recovery duration, and MET values for each phase.

HIIT calorie burn calculator interval training calories high intensity exercise energy MET calculator HIIT

Home Radon Mitigation Runtime Planner (Fan Runtime & ACH Calculator)

Estimate how long a radon mitigation fan must run to reach a target radon concentration. Uses space volume, fan airflow (CFM), infiltration (ACH), and radon entry rate to model decay and steady-state.

radon mitigation calculator radon fan runtime indoor air quality planning radon reduction time ACH

Ideal Body Weight Calculator (Devine, Hamwi, Miller, Robinson)

Calculate ideal body weight with the Devine, Hamwi, Miller, and Robinson formulas. Compare IBW estimates by height and reference sex, with formulas and a worked example.

ideal body weight calculator devine formula hamwi method miller equation robinson equation

In-Flight Cosmic Radiation Calculator - Estimate Airline Dose by Altitude and Time

Estimate in-flight cosmic-radiation dose from cruising altitude, time at cruise, and solar conditions with a transparent airline exposure calculator.

air travel radiation calculator cosmic ray dose flight safety air travel radiation airline

Insomnia Severity Index Calculator | Seven-Item ISI Score

Calculate an Insomnia Severity Index (ISI) score from seven sleep-impact ratings and view its standard severity range.

insomnia severity index ISI calculator sleep assessment CBT ISI

Insulin Bolus Calculator - Carb Counting and Correction Doses

Estimate rapid-acting insulin doses using carb counts, current blood glucose, and correction factors.

insulin bolus calculator carb ratio correction factor CGM TDD

Insulin Sensitivity Factor Calculator - Diabetes Management Aid

Estimate your insulin sensitivity factor (ISF) from your total daily insulin dose using the 1500, 1700, or 1800 rule, in mg/dL and mmol/L. Educational estimate only.

insulin sensitivity factor ISF calculator diabetes care ISF TDD

Langmuir Adsorption Calculator - Estimate Surface Coverage from K and P

Estimate Langmuir surface coverage from adsorbate pressure or concentration and an adsorption constant K for monolayer sites.

Langmuir adsorption calculator isotherm surface science BET Brunauer-Emmett-Teller

LASIK vs Glasses & Contacts Lifetime Cost Calculator

Compare LASIK, PRK, SMILE, or a lens implant with glasses or contacts over your chosen analysis period. Model surgery, follow-up care, insurance discounts, and yearly eyewear spending.

LASIK cost calculator vision correction LASIK vs contacts refractive surgery cost eye surgery pricing

LDL Cholesterol Estimator - Friedewald Formula

Estimate your low-density lipoprotein (LDL) cholesterol using the Friedewald formula from standard lab values for total cholesterol, HDL, and triglycerides...

LDL calculator Friedewald equation cholesterol estimator AACVPR AAPA

Lightning Strike Probability Calculator | Estimate Annual Exposure

Estimate annual lightning strike probability from flash density, outdoor hours, and how exposed your surroundings are.

lightning strike probability calculator lightning risk lightning safety outdoor exposure annual

Loading Dose Calculator - Estimate a Rapid Pharmacokinetic Starting Dose

Estimate a loading dose from target concentration, volume of distribution, and bioavailability for IV or oral dosing when rapid therapeutic levels matter.

loading dose calculator pharmacology dosage therapeutic drug monitoring ABC C target

Meat Smoking Time Calculator | Estimate BBQ Cook Time and Wood Fuel

Estimate smoker hours and wood fuel for brisket, pork shoulder, ribs, chicken, or salmon based on weight and smoker temperature.

meat smoking time calculator bbq wood consumption brisket smoking hours barbecue calculator BBQ

Medication Dosage Calculator - Weight Based Guidance

Compute medication dosage using patient weight and drug concentration. Always consult a healthcare professional before use.

drug dosage calculator mg per kg medical dosing 3.5 mL or 4.0 mL BSA

Medication Half-Life Calculator | Estimate How Long a Dose Lingers

Estimate how much medication remains after a chosen number of hours, track elapsed half-lives, and gauge when a dose has mostly cleared.

medication half-life calculator pharmacokinetics drug elimination after chosen

Medication Tapering Schedule Calculator & Discussion Worksheet

A medication tapering schedule worksheet: record the drug, class, current dose, symptoms, and prescriber-written dose steps. It does not generate dosing advice.

medication taper worksheet prescriber taper visualizer dose discussion planner medication safety tapering schedule calculator

Metabolic Age Calculator - Estimate Your BMR-Based Age

Compare your Mifflin–St Jeor BMR with age-band averages to estimate metabolic age from your age, sex, weight, height, and activity level.

metabolic age calculator BMR basal metabolic rate metabolism age health

MRI Quench Room Oxygen Hazard Calculator

Estimate how quickly oxygen levels fall in an MRI room during a helium quench based on vent efficiency, HVAC makeup air, and helium inventory.

MRI quench calculator helium boil-off oxygen displacement cryogen safety CSV

Navy PRT Score Calculator (Estimator) | Push-ups, Plank, 1.5-Mile Run

Estimate your U.S. Navy Physical Readiness Test score with a planning-focused calculator for push-ups, forearm plank, and the 1.5-mile run. Includes formulas, assumptions, a worked example, interpretation guidance, and an optional readiness mini-game.

navy prt calculator physical readiness test military fitness push-ups plank

Noise Exposure Calculator - Estimate Safe Listening Time

Estimate safe noise exposure time from any decibel level using NIOSH and OSHA limits, factor in hearing-protection NRR, and see when to take a break.

noise exposure calculator safe listening time decibel CFR NIOSH

Omega-3 to Omega-6 Ratio Calculator | Daily Fatty Acid Balance

Calculate your omega-6 to omega-3 intake ratio, see whether it meets a 4:1 goal, and estimate the additional omega-3 needed.

omega 3 to omega 6 ratio calculator fatty acid balance 1 tbsp 4 - omega3Grams ALA

Orthodontic Treatment Cost & Duration Planner - Braces Calculator

Calculate total orthodontic treatment costs including braces, Invisalign, and aligners. Plan payment options, insurance coverage, and realistic treatment timelines by complexity.

braces cost calculator Invisalign cost orthodontic treatment planner teeth alignment cost dental braces pricing

Oxygen Delivery & Respiratory Support Calculator (FiO2 & ROX Index)

Estimate FiO2 by oxygen device and flow, then compute the ROX index, S/F and P/F ratios, alveolar PAO2, A-a gradient, oxygen content, and O2 cylinder runtime.

oxygen calculator FiO2 calculator ROX index calculator SpO2 FiO2 ratio PaO2 FiO2 ratio

Ozone Exposure Risk Calculator for EPA 8-Hour Benchmark and Inhaled Dose

Compare an ozone concentration with the EPA 8-hour benchmark and estimate inhaled dose from breathing rate, exposure time, and body weight.

ozone exposure calculator ambient ozone benchmark respiratory dose AQI EPA

Peak Expiratory Flow Calculator | Predicted PEF and Asthma Zones

Estimate predicted peak expiratory flow with the Nunn & Gregg equations, compare your measured reading, and see your green, yellow, or red asthma zone.

peak expiratory flow calculator pef calculator asthma zones lung function peak flow meter

PHQ-9 Depression Symptom Score Calculator | 9-Item Total

Add nine PHQ-9 symptom-frequency responses to see the 0–27 depression screening score and its severity band.

PHQ-9 calculator depression score mental health assessment PHQ PHQ-9

Pittsburgh Sleep Quality Index Calculator | Simplified PSQI Screener

Score seven Pittsburgh Sleep Quality Index components, including sleep efficiency from your bed and wake times, and see how the total reads against the standard cutoff.

PSQI calculator Pittsburgh sleep quality index sleep quality score sleep assessment screener PSQI

Potassium Intake Calculator: Daily mg Target by Age and Life Stage

Find your daily potassium Adequate Intake in mg by age and life stage, compare it with what you eat, and see how many servings of a food would close the gap.

potassium intake calculator recommended potassium daily potassium mg potassium requirement by age potassium RDA

Pregnancy Due Date & Gestational Age Calculator - Naegele Rule

Estimate your due date, gestational age, and trimester from your last menstrual period, conception date, or ultrasound using Naegele's rule.

pregnancy calculator due date calculator gestational age Naegele rule pregnancy timeline

Prostate Cancer Risk Calculator: PSA Density, Velocity, Free PSA

Assess a PSA result against age-specific reference ranges, PSA density, PSA velocity, and the published free-PSA probability table. Educational, not a diagnosis.

prostate cancer risk calculator PSA risk assessment PSA density PSA velocity free PSA ratio

QTc Interval Calculator (Bazett & Fridericia) — QT Correction

Calculate QTc from QT and RR intervals using Bazett and Fridericia formulas. Includes interpretation tips, examples, and key limitations for safer use.

QTc calculator QT interval correction Bazett formula Bazett & Fridericia ECG

Radiation Dose Calculator | Estimate Exposure per Session, Month, and Year

Estimate radiation dose from intensity, exposure time, and visit frequency. Compare per-session, monthly, and annual totals in mSv, with unit conversion, worked examples, and an optional ALARA mini-game.

radiation dose calculator exposure estimate sievert calculator mSv calculator uSv to mSv

Radiation Shielding Thickness Calculator for Gamma and X-Ray Attenuation

Estimate the shield thickness in centimeters needed to reduce gamma-ray or X-ray intensity using a linear attenuation coefficient.

radiation shielding calculator attenuation thickness dose reduction HVL NIST

Rowing Machine Calorie Burn Calculator (Erg/Indoor Rowing)

Estimate calories burned on a rowing machine from distance, time, and body weight. See pace, 500 m split, MET level, formulas, a worked example, and an optional rowing mini-game.

rowing machine calorie calculator erg calories indoor rowing MET rowing energy expenditure 500m split calculator

Running Impact Force Calculator - Estimate Stress on Your Joints

Estimate running impact force from your weight, speed, and cadence. See peak ground reaction force in newtons and as body-weight multiples to compare training loads.

running impact force calculator joint stress estimator GPS GRF about 5–10 steps per minute

Skeletal Muscle Mass Index Calculator | Estimate SMI From Weight, Body Fat, and Height

Calculate estimated skeletal muscle mass index (SMI) from weight, body fat percentage, height, and sex, with lean-mass output, formula details, worked example, and interpretation guidance.

skeletal muscle mass index calculator SMI calculator muscle mass estimator 0.45 for women BMI

Sleep Apnea Risk Calculator | STOP-BANG Screening Tool

Estimate obstructive sleep apnea screening risk with the STOP-BANG questionnaire. Review symptoms, BMI, age, neck circumference, and a clear low, intermediate, or high risk result.

sleep apnea risk calculator STOP-BANG snoring daytime sleepiness sleep disorder

Smoking Pack-Year Calculator | Calculate Pack Years from Cigarettes Per Day

Use this smoking pack-year calculator to estimate cumulative cigarette exposure from cigarettes per day and years smoked. Includes the standard formula, examples, interpretation guidance, limitations, and an optional pack-year mini-game.

pack year calculator smoking history lung cancer risk tobacco exposure 10 cigarettes

Sports Betting Arbitrage Calculator | Two-Outcome Surebet Stake Split

Calculate a two-outcome sports betting arbitrage stake split, implied probability, payout, and theoretical profit from decimal odds.

sports betting arbitrage calculator surebet risk-free betting and the edge can be expressed as arbitrage

Stair Climber Calorie Burn Calculator | Steps, Vertical Gain, and METs

Estimate stair climber calories from steps, step height, workout time, and body weight. See cadence, vertical meters climbed, and the MET used for the stair-session estimate.

stair climbing calorie calculator stepper MET stair climber energy burn stairs calories burned stair workout calculator

Standing Desk Calorie Burn Calculator | Standing vs Sitting Estimate

Estimate the extra calories burned by standing instead of sitting. Enter weight in kg and daily standing hours for a quick MET-based calorie comparison.

Standing Desk Calorie Burn Calculator | Standing vs Sitting Estimate health calculator MET MET stand − MET sit MET-based

Steps to Distance Converter | Estimate Walking Distance from Step Count

Turn a step count into estimated distance in miles and kilometers by entering your step length. Includes stride measurement tips, formula notes, and accuracy guidance.

steps to miles steps to kilometers distance walked 0 or more FAQ

STOP-BANG Sleep Apnea Risk Calculator

Calculate a STOP-BANG score from snoring, tiredness, observed apnea, blood pressure, BMI, age, neck circumference, and sex to estimate sleep apnea screening risk.

stop bang calculator sleep apnea risk snoring assessment stop-bang score obstructive sleep apnea screening

Sunburn Risk Calculator – Estimate Time to Burn from UV Index and SPF

Estimate a rough sunburn-time guide from UV index, skin type, and sunscreen SPF with this simple calculator.

sunburn risk calculator safe sun exposure UV index sunscreen SPF aggressive

Thin-Walled Pressure Vessel Stress Calculator

Compute hoop and longitudinal stresses for cylindrical or spherical thin-walled pressure vessels.

thin walled pressure vessel stress calculator hoop stress cylindrical vessel ASME LNG

Tire Pressure Adjustment Calculator - Account for Temperature Changes

Calculate the recommended tire pressure based on temperature differences. Keep your tires properly inflated for safety and fuel efficiency.

tire pressure adjustment temperature tire calculator PSI change with temperature tire safety P 1 + P atm

UV-C Exposure Time Calculator for Germicidal Dose Planning

Estimate UV-C exposure time from lamp power, distance, or measured intensity to reach a target germicidal dose on a surface or air path.

uvc exposure time calculator germicidal lamp dose disinfection uv calculator DNA RNA

Vaccine Temperature Excursion Potency Risk Calculator

Model estimated vaccine potency loss during a temperature excursion from degrees above the limit, exposure duration, formulation sensitivity, and starting potency.

vaccine cold chain risk calculator temperature excursion potency loss immunization storage 1 − P remain P start

Virtual Marathon Training Pacer - Plan Weekly Speeds

Generate a simple pacing plan for your marathon training. Enter your goal finish time and number of weeks to get recommended pace adjustments.

marathon training pacer running pace planner adjustments enter finish

Vitamin D Sunlight Exposure Calculator - Sun Minutes

Estimate how many minutes of midday sun your body needs for vitamin D based on UV index, skin type, and how much skin is exposed.

vitamin d sunlight calculator uv exposure estimator vitamin d sun exposure time sunlight exposure calculator 100 ÷ bodyExposedPct

Waist-to-Height Ratio Calculator for Abdominal Obesity Screening

Calculate your waist-to-height ratio, review the built-in screening category, and compare your waist measurement with the commonly used 0.5 reference.

waist-to-height ratio WHtR screening central obesity risk abdominal obesity assessment built

Walking Calorie Burn Calculator – Research‑Based Energy Estimate

Estimate calories burned on your walk using distance, time and body weight. This calculator applies research‑based MET values to give an approximate energy u...

walking calories walking calorie calculator walking energy expenditure 30 min 4.3 METs

Wearable Device Battery Life Predictor for Smartwatch Runtime

Estimate smartwatch or fitness band runtime from battery capacity, average draw, daily wear time, and power-management efficiency.

wearable battery life calculator smartwatch battery estimator AMOLED GPS LTE

Weight Lifting Calorie Burn Calculator | MET-Based Strength Training Estimate

Estimate calories burned in a weight lifting workout from active lifting time, body weight, and intensity using MET values.

weight lifting calories strength training calorie calculator weight training energy calories burned lifting weights MET

Wells Score for DVT Calculator | Estimate Deep Vein Thrombosis Pre-Test Probability

Calculate the Wells score for suspected deep vein thrombosis using standard clinical criteria, review the MathML formula, and understand low, moderate, and high pre-test probability categories.

Wells score calculator DVT risk assessment deep vein thrombosis probability Wells DVT score -2 points

Y-BOCS OCD Score Calculator | Yale-Brown Obsessive Compulsive Scale

Total the 10 Yale-Brown Obsessive Compulsive Scale items, see obsession and compulsion subscores, and read common Y-BOCS severity ranges. Not a diagnosis.

Y-BOCS calculator OCD severity test obsessive compulsive scale Yale-Brown scale BOCS

Saved health calculators

Keep your go-to wellness tools ready for check-ins and planning.

Browse all health calculators

You haven't saved any health calculators yet. Search or browse to pin your favourites.