Density Calculator
Calculate density, mass or volume with ρ = m ÷ V, in metric or US units.
Science Tools
Chemistry and physics calculators: molar mass, half-life, density, motion and waves.
Half-Life Calculator
Solve radioactive decay problems: amount remaining, initial amount, time elapsed or half-life.
Kinematics (SUVAT) Calculator
Solve constant-acceleration motion from any three of displacement, velocities, acceleration and time.
Molar Mass Calculator
Calculate the molar mass of a chemical formula and its composition by mass, with brackets and hydrates.
Wave Speed, Frequency and Wavelength Calculator
Use v = f × λ to find wave speed, frequency or wavelength, for light, radio, sound or any wave.