Empirical formula calculator
Empirical formula from mole amounts or from mass percent composition.
Calculator
How to use
Empirical formula
- Mole amounts: reduce to the smallest integer ratio.
- Mass %: assume a 100 g sample, convert to moles, then reduce.
When to use
- Combustion analysis and composition problems.
- A first step before finding the molecular formula.
Educational use only. Double-check values for labs, homework, and exams.