Science calculators
Physics, chemistry and electronics: forces, solutions, waves and circuits, with every formula shown.
12 calculators · every one shows its working
- Ohm's Law CalculatorVoltage, current, resistance and power from any two of them, with V = I × R.
- Dilution Calculator (C1V1 = C2V2)How much stock solution and water to mix for the strength you want, or the strength after diluting.
- Half-Life CalculatorAmount remaining, time taken or the half-life itself, for radioactive decay, medicines and more.
- Density CalculatorDensity from mass and volume, or the mass or volume from the density, in kg/m³ and g/cm³.
- Resistor Colour Code CalculatorRead the value and tolerance of a 4-band or 5-band resistor from its colour bands.
- Heat Index Calculator (Feels-Like Temperature)How hot or cold it really feels from the temperature, humidity and wind, with the dew point and the heat risk.
- Molarity CalculatorGrams to weigh out for a solution of a given molarity, or the molarity of a solution you've made.
- Projectile Motion CalculatorHow far and how high something thrown or launched goes, and how long it stays in the air.
- Kinetic Energy CalculatorKinetic energy from mass and speed, or the speed or mass from the energy, with momentum.
- Lightning Distance CalculatorHow far away lightning struck, from the seconds between the flash and the thunder.
- Frequency and Wavelength CalculatorWavelength from frequency or frequency from wavelength, for light, radio and sound.
- Watts to Amps CalculatorConvert watts to amps and amps to watts for single-phase, three-phase and DC supplies.