Science

Find the current in amps from a voltage and either the watts or the ohms, for DC, single-phase AC with a power factor, or three-phase AC.

Molarity from a weighed mass or from moles and a volume, plus the grams to weigh out for a target concentration and the stock volume for a dilution.

Balances a chemical equation exactly by solving the atom conservation system, handling brackets and hydrates and refusing anything it cannot balance.