Measure • Model • Explore
From lab conversions to physics and statistics, explore calculators that make research-grade math feel approachable.
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A hand-picked starting set of 24 calculators. Browse all 514 science calculators through the topic hubs above, or use search.
Estimate earthquake radiated energy from moment magnitude, compare two quakes, and see the TNT equivalent in joules, tons, kilotons, or megatons.
Use this earthquake magnitude calculator to estimate local (Richter) magnitude from wave amplitude and distance to the epicenter, with clear formulas, exampl...
Interactive rocket equation calculator with mass burn, velocity, and energy tracking on a responsive canvas.
Determine the gravitational acceleration on any planet or moon using its mass and radius. Explore how surface gravity shapes planetary environments.
Estimate buffer capacity for a weak acid/conjugate base pair from pKa, acid concentration, and base concentration.
Estimate the pH of a buffer from acid and conjugate base concentrations using the Henderson–Hasselbalch equation. Ideal for biochemistry, molecular biology...
Translate DNA or RNA codons into an amino-acid sequence with the standard genetic code. Paste a sequence, choose a reading frame, and compare how frame shifts change protein output.
Design aquaponics systems with optimal fish tank, biofilter, and plant grow bed sizing. Calculate fish stocking density, plant yield, nutrient cycling, and system economics for tilapia, trout, and other species.
Estimate galaxy distance from redshift with Hubble's Law using an adjustable Hubble constant and a low-redshift velocity approximation.
Convert your Earth age into Mercury, Venus, Mars, Jupiter, and other planetary years using average orbital periods. Includes formulas, examples, assumptions, and an optional orbit-timing mini-game.
Enter a real 3×3 matrix to compute its characteristic polynomial, eigenvalues, and a real eigenvector for each real root.
Compute the characteristic polynomial of a small real matrix and see how its coefficients connect to trace, determinant, and eigenvalues.
Find chord length, arc length, and segment area from a radius and central angle, with a live circle diagram, MathML formulas, and a worked example.
Measure a sphere's volume and surface area from its radius with this calculator. See the formulas, a worked example, and the main assumptions behind the result.
Use this beta distribution calculator to compute the PDF, CDF, mean, variance, and mode for Beta(a, b). Enter positive shape parameters a and b and a point x in [0, 1] to evaluate proportions, rates, and Bayesian priors.
Estimate extinction probability, short-run survival, and criticality for Galton–Watson branching processes with Poisson, binomial, or custom offspring laws.
Estimate household electrical demand, compare it with your service size, and review conservative breaker and panel upgrade guidance for common residential loads.
Estimate resistive heating power and energy for a resistive load from voltage or current, resistance, and time.
Estimate recoverable energy (kWh) and cost savings from regenerative braking using vehicle mass, speed change, regen efficiency, braking events per day, and electricity price.
Estimate energy stored in a sand heat battery, charging time, and heating duration for off-grid thermal storage experiments.
Estimate HVAC cooling capacity in BTU/hr and tons for a room, house, or office using square footage, climate, insulation, sun exposure, and internal heat gains. Compare sizing assumptions and review practical limits.
Calculate nominal bolt shear strength Vn and design shear strength φVn from bolt diameter, ultimate tensile strength, number of shear planes, and whether threads are in the shear plane. Includes formulas, assumptions, a worked example, practical design notes, and an optional bolt-alignment mini-game.
Estimate nominal and design shear strength of a reinforced concrete beam (ACI-style Vc+Vs) in SI units (mm, MPa), including φVn.
Estimate delivered flow, waste flow and daily volume from a hydraulic ram pump using drive flow, drive head, delivery head and D'Aubuisson efficiency.
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