Tools

Calculators, charts and reference lists for chemistry homework and revision.

Calculators

Type any formula, get its mass & composition

Balance any equation, with an atom check

From % composition to empirical and molecular formula

Concentration from mass, molar mass and volume

C₁V₁ = C₂V₂ for any variable

Actual vs theoretical yield, in percent

pH, pOH, [H⁺] and [OH⁻] from any one

Radioactive decay: amount left, time or half-life

Solve PV = nRT for any variable

Names, formulas and charges

Which ionic compounds dissolve in water

Metals ranked from most to least reactive

Common strong and weak acids and bases

E° table at 25 °C and a cell voltage calculator

Which metal ions give which flame colors

Avogadro, R, Faraday and other constants

What we breathe, gas by gas

When each element was found

Tip: choose landscape orientation.