OneTaskFree Science Calculators
Energy, Wavelength, Periodic Table, Molar Mass, Gas Laws, pH and Transformer Calculators
Physics and electronics calculators that show the formula and the working. Find the kinetic or potential energy of a moving or raised object, convert a frequency to a wavelength, time light across the solar system, or work out reactance, time constants, transformer turns and the load a set of speakers puts on an amplifier.
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Speed Of Light Calculator
How long light takes to travel a distance, or how far it goes.
Capacitor And Inductor Calculator
Reactance, RC and RL time constants and LC resonant frequency.
Speed Of Light Calculator
How long light takes to travel a distance, or how far it goes.
Capacitor And Inductor Calculator
Reactance, RC and RL time constants and LC resonant frequency.
Physics 3
Energy, waves and the speed of light.
Chemistry 13
Periodic table, moles, solutions, gases and equations.
Chemical Equation Balancer
Balance any chemical equation with whole-number coefficients.
NewCombined Gas Law Calculator
Solve P1V1/T1 = P2V2/T2 for any missing value.
NewDilution Calculator
Solve C1V1 = C2V2 and get the stock-and-water recipe.
NewEmpirical Formula Calculator
Empirical and molecular formula from percent or grams.
NewGrams To Moles Converter
Grams to moles and back for any formula.
NewHalf-Life Calculator
Amount left, decay time or half-life, isotopes built in.
NewIdeal Gas Law Calculator
Solve PV = nRT for any one unknown, in any common unit.
NewInteractive Periodic Table
All 118 elements, coloured by category, block or property.
NewMolar Mass Calculator
Molar mass of any formula, brackets and hydrates included.
NewMolarity Calculator
Molarity, mass to weigh and volume for any solution.
NewPercent Composition Calculator
Mass percent of each element in any formula.
NewPercent Yield Calculator
Percent yield and theoretical yield from a limiting reactant.
NewPH Calculator
pH, pOH and ion concentrations, weak acids and bases too.
Electronics 3
Capacitors, inductors, transformers and speaker wiring.
How the science tools are organised
Physics covers energy in all its forms, from ½mv² and mgh to kilowatt-hours and E = mc², the link between frequency and wavelength for radio, light and sound, and the time light takes to cross any distance in a vacuum or through glass, water and fibre. Chemistry has an interactive periodic table and calculators for moles, solutions, gases, pH, yields and balancing equations. Electronics covers capacitors and inductors, transformers and speaker wiring, the sums you need when building or repairing circuits.
SI units throughout
Every tool works in SI units, metres, kilograms, seconds, joules, ohms and hertz, and shows results in the everyday units people actually use alongside them, such as kWh, km/h, light-minutes and electronvolts. Physical constants such as the speed of light and standard gravity use their exact defined values, so results match textbooks and datasheets.
More science tools
Ohm's law, force, pressure, density, resistor colour codes, battery life, decibels and joules to kWh live in the main calculators section and are linked from the relevant pages here.
FAQ
Do these science calculators show the working?
Yes. Each result shows the formula with your numbers substituted, such as ½ × 1,500 × 27.78² for a car's kinetic energy or 1 ÷ 2π√(LC) for a resonant frequency, so you can check it by hand or copy the method into homework or a design note.
What constants do the calculators use?
The speed of light is exactly 299,792,458 m/s, standard gravity is 9.80665 m/s² and Planck's constant and the electron charge use their exact 2019 SI values. Speeds of sound use typical values for air at 20 °C and for water, which you should adjust for very different conditions.
Is my data sent anywhere?
No. Every calculation runs in your browser, so the values you enter never leave your device. The pages keep working offline once they have loaded, which is handy on a workbench or in a classroom without a connection.
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