โ๏ธStoichiometry Calculator
Convert between moles, mass, and particles for any species in a balanced chemical equation.
Free Stoichiometry Calculator
Our free stoichiometry calculator converts between moles, mass, and particles for any species in a balanced chemical equation. Enter your equation, pick a known species and its amount (in grams, moles, or particles), then choose a target species โ the calculator converts your known amount to moles, applies the mole ratio from the balanced coefficients, and converts the target's moles into whichever unit you need.
Every conversion step is shown: the molar-mass conversion to moles, the mole-ratio multiplication using the balanced equation's coefficients, and the final conversion to mass or particle count using Avogadro's number.
This makes the tool useful for stoichiometry homework, lab prep, and quickly checking reactant-to-product conversions without doing the unit-factor math by hand. No sign-up, no downloads โ everything runs instantly in your browser.