Science calculators
52 free science tools, each with the formula and step-by-step working.
- Aquarium Heater CalculatorHeater wattage for your tank.
- Beer-Lambert Law CalculatorAbsorbance, concentration and path length.
- Boyle's Law CalculatorPressure and volume at constant temperature.
- Buffer Solution pH CalculatorBuffer pH from the Henderson-Hasselbalch equation.
- Carbon Offset CalculatorTrees and cost to offset your emissions.
- Charles's Law CalculatorVolume and temperature at constant pressure.
- Compost Ratio CalculatorBalance greens and browns for fast compost.
- Dilution CalculatorM1V1 = M2V2 for any dilution problem.
- Dilution CalculatorVolume needed to dilute a stock solution to a target concentration.
- Doppler Effect CalculatorObserved frequency for a moving source.
- Escape Velocity CalculatorSpeed needed to leave a gravity well.
- Frequency Wavelength CalculatorConvert between frequency and wavelength.
- Gas Density CalculatorDensity of an ideal gas from pressure, molar mass and temperature.
- Gravitational Force CalculatorNewton's law of universal gravitation.
- Greenhouse Heating CalculatorHeater size to hold your target temperature.
- Half-Life CalculatorRemaining amount after any number of half-lives.
- Harvard Composition CalculatorWork out mass percent composition the Harvard chemistry way, step by step.
- Ideal Gas Law CalculatorSolve pressure, volume, temperature or moles with PV=nRT.
- Lens Equation CalculatorFocal length, image distance and magnification.
- Light Travel Time CalculatorHow long light takes to cross a distance.
- Molar Mass CalculatorGrams per mole and mole conversions.
- Molar Mass CalculatorMolar mass of common compounds and mole conversion.
- Molarity CalculatorMoles, mass and concentration for any solution.
- Molarity CalculatorSolution molarity from moles or mass of solute.
- Momentum CalculatorMomentum, impulse and force.
- Ohm's Law CalculatorVoltage, current, resistance and power from any two.
- Orbital Period CalculatorKepler's third law for any orbit.
- Parallel Resistor CalculatorTotal resistance in parallel and series.
- Percent Composition CalculatorMass percent of each element, or of a solute in a solution.
- Percent Yield CalculatorActual vs theoretical reaction yield.
- Percent Yield CalculatorPercent yield from actual and theoretical product mass.
- pH Adjustment CalculatorAcid or base needed to shift pH.
- pH CalculatorpH from hydrogen ion concentration, or the reverse.
- Projectile Motion CalculatorRange, height and flight time.
- Projectile Range CalculatorRange, height and flight time.
- Radiation Dose CalculatorCumulative radiation dose and annual limit comparison.
- Radioactive Decay Activity CalculatorRemaining activity, decay constant and elapsed half-lives.
- Radioactive Decay CalculatorRemaining activity after any time.
- Radioactive Half-Life CalculatorRemaining quantity after radioactive decay.
- Rainwater Collection CalculatorLitres collected from your roof.
- Reynolds Number CalculatorLaminar or turbulent flow test.
- Significant Figures CalculatorCount sig figs and round to any precision.
- Specific Heat CalculatorEnergy to heat a mass by a temperature.
- Spring Constant CalculatorHooke's law force, extension and energy.
- Stoichiometry CalculatorProduct moles and mass from reactant amounts and mole ratio.
- Terminal Velocity CalculatorFree-fall speed limit with drag.
- Titration CalculatorUnknown concentration from titration data.
- Titration CalculatorUnknown concentration from an acid-base titration.
- Voltage Drop CalculatorCheck whether a cable run is too long for the load.
- Water Potential CalculatorΨ from solute and pressure potential for AP Biology.
- Wind Turbine Power CalculatorPower output from wind speed and rotor size.
- Work and Energy CalculatorWork done, power and energy.
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