Health Calculators

We are working on building a calculator for every computation life throws at you - from the serious to the whimsical. Now also in Spanish and Portuguese!

We currently have 500 calculators available.

Acoustic Intensity Level Calculator - Sound Power per Area

Convert acoustic intensity to decibel level using the standard reference value.

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Blackbody Radiation Calculator - Planck's Law

Calculate spectral radiance using Planck's law for a blackbody at a given temperature and wavelength.

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Blood Alcohol Content (BAC) Calculator - Estimate Your Level

Estimate your blood alcohol concentration with our BAC Calculator. Enter drinks consumed, body weight, and time to understand alcohol effects and stay safe.

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BMI Calculator - Calculate Your Body Mass Index

Calculate your Body Mass Index (BMI) easily with our BMI calculator. Enter your weight and height to find out if you're underweight, normal weight, overweight, or obese.

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BMR Calculator - Estimate Your Basal Metabolic Rate

Calculate your Basal Metabolic Rate (BMR) quickly. Find out how many calories your body burns at rest to plan your diet and fitness goals.

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BMR Calculator - Estimate Your Basal Metabolic Rate

Use this simple BMR calculator to estimate how many calories your body burns at rest each day. Learn about the Mifflin-St Jeor equation and how understanding your basal metabolic rate can guide healthy eating and fitness goals.

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Boat Fuel Consumption Calculator - Estimate Trip Fuel Needs

Calculate how much fuel your boat will use based on engine horsepower, cruise speed, and distance. Plan efficient trips and avoid running out of gas.

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Body Fat Percentage Calculator - Estimate Your Body Fat

Estimate your body fat percentage using the U.S. Navy Method. Enter your height, neck, waist, and hip measurements to get an accurate body fat estimate.

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Calorie Burn Calculator - Estimate Exercise Energy Use

Calculate how many calories you burn during exercise based on activity intensity, your weight, and duration.

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Calorie Deficit Calculator - Plan Your Weight Loss

Calculate a daily calorie target for losing weight safely. Enter your maintenance calories and desired deficit to see how many calories you should consume.

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Calorie Intake Calculator (BMR & TDEE) - Calculate Your Daily Caloric Needs

Calculate your daily caloric needs using the Calorie Intake Calculator. Determine your BMR and TDEE to maintain, lose, or gain weight effectively.

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Cherenkov Angle Calculator - Predict Light Emission Angle

Compute the angle of Cherenkov radiation emitted by a charged particle moving through a medium. Enter particle speed and refractive index to see the emission geometry.

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Daily Water Intake Calculator - Stay Properly Hydrated

Estimate how much water you should drink each day. Enter your body weight to see a recommended daily water intake.

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Fertilizer Application Calculator - Optimize Nutrient Use

Calculate how much fertilizer you need based on area size, desired nutrient rate, and fertilizer grade.

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HVAC Duct Size Calculator - Choose the Right Diameter

Estimate the proper duct diameter for heating and cooling systems using airflow (CFM) and duct length. Improve efficiency and reduce noise.

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Hydroponic Nutrient Calculator - Mix the Right Solution

Calculate the exact amount of nutrient concentrate needed for your hydroponic system based on reservoir size and desired strength.

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Mach Number Calculator - Speed Relative to Sound

Determine an object's Mach number from its speed and ambient temperature. Explore supersonic flight and compressible flows.

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Macro Nutrient Calculator - Plan Carbs, Protein, and Fat

Break down your daily calories into carbs, protein, and fat. Enter your calorie target and macro percentages to get grams for each nutrient.

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Noise Exposure Calculator - Estimate Safe Listening Time

Determine how long you can safely stay in loud environments based on sound level.

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Ovulation Fertility Calculator - Estimate Your Most Fertile Days

Use our Ovulation Fertility Calculator to estimate your most fertile days and increase your chances of conception. Simple and easy to use.

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Personal Injury Compensation Calculator - Estimate Your Settlement

Use our Personal Injury Compensation Calculator to estimate your settlement amount. Enter your medical expenses, lost wages, and pain & suffering to see your potential compensation.

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Personal Injury Settlement Calculator - Estimate Your Claim Value

Use our Personal Injury Settlement Calculator to estimate how much your accident or injury claim could be worth based on medical expenses, lost wages, and more.

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Pizza Party Planner - How Many Pizzas Do You Need?

Planning a pizza party? Instantly calculate how many pizzas you'll need based on your guests and their appetite level. Avoid running out or having leftovers!

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Pregnancy Due Date Calculator - Estimate Your Due Date

Estimate your pregnancy due date with our reliable calculator. Use your last menstrual period (LMP) or conception date to plan your journey to parenthood.

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Protein Intake Calculator - Daily Protein Needs

Estimate how much protein you should eat each day based on your body weight. Ideal for fitness planning and healthy dieting.

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Radiation Dose Calculator - Estimate Your Exposure

Determine absorbed dose from radiation intensity and time of exposure. Learn about sieverts, health guidelines, and typical sources.

Radiation Pressure Calculator - Light Momentum Transfer

Calculate the pressure exerted by electromagnetic radiation on a surface, including options for absorption or reflection.

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Radiation Shielding Thickness Calculator - Attenuation Distance

Calculate the material thickness required to reduce radiation intensity using the exponential attenuation formula.

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Reading Time Calculator - Plan Your Study Sessions

Calculate how long it will take to read a text by entering word count or pasting content. Adjust reading speed to match your pace.

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Reverberation Time Calculator - Plan Your Acoustics

Estimate RT60 using room dimensions and absorption coefficient. Learn how reverberation affects sound clarity in studios, auditoriums, and home theaters.

Running Pace Calculator - Find Your Pace Per Mile

Calculate your running pace quickly. Enter distance and total time to see your pace per mile or kilometer.

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Running Shoe Lifespan Calculator - Know When to Replace Your Trainers

Estimate how long your running shoes will last. Enter shoe lifespan in miles, weekly mileage, and cost to plan replacements and budget.

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Signal-to-Noise Ratio Calculator - Audio and Data Quality

Compute signal-to-noise ratio in linear units or decibels. Understand how noise affects communications, audio fidelity, and scientific measurements.

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Sleep Cycle Calculator - Find the Best Bedtimes

Discover optimal bedtimes based on your desired wake-up time. This Sleep Cycle Calculator helps you align with 90-minute sleep cycles for better rest.

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Sleep Debt Calculator - Track Your Rest Deficit

Measure how much sleep you miss each week and plan recovery with this simple Sleep Debt Calculator.

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Sleep Quality Score Calculator - Evaluate Your Rest

Estimate your nightly restfulness by entering sleep duration, awakenings, time to fall asleep, and snoring level. Discover tips to improve sleep hygiene.

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Smoking Cost Calculator โ€“ Find Out How Much Smoking Really Costs You

Calculate the real cost of smoking cigarettes over time. See how much money you could save by quitting smoking today.

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Solar Panel Cleaning Interval Calculator - Maintain Peak Efficiency

Estimate how often to clean your solar panels based on dust levels, rainfall, and tilt angle. Keep your photovoltaic system running efficiently.

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Speed of Sound Calculator - Acoustic Velocity in Gases

Calculate the speed of sound in an ideal gas from temperature, molar mass, and heat capacity ratio.

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Subwoofer Box Volume Calculator - Design Custom Enclosures

Estimate the internal volume of your subwoofer box by entering its external dimensions and wall thickness. Learn how volume affects sound quality for sealed and ported enclosures.

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Sunburn Risk Calculator - Estimate Safe Exposure Time

Find out how long you can stay in the sun before burning by entering the UV index, your skin type, and sunscreen SPF. Learn tips to protect your skin and enjoy the outdoors.

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Target Heart Rate Calculator - Find Your Optimal Heart Rate Zones

Calculate your target heart rate zones for optimal fitness and exercise intensity. Use our Target Heart Rate Calculator for personalized recommendations.

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TDEE Calculator - Estimate Total Daily Energy Expenditure

Calculate your Total Daily Energy Expenditure (TDEE) with this straightforward calculator. Determine how many calories you need each day based on your activity level.

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Thermal Noise Calculator - Johnsonโ€“Nyquist Voltage

Estimate the RMS thermal noise voltage generated by a resistor at a given temperature and bandwidth.

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Workout Recovery Time Calculator - Find Your Optimal Rest Period

Estimate how long you should rest after a workout based on intensity, duration, sleep, and nutrition.

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