🔢

Empirical & Molecular Formula

Determine the empirical formula from percentage composition and find the molecular formula.

Dr. Lena FischerVerified

PhD Chemistry (Analytical), MRSC

Analytical chemist with 12 years in pharmaceutical QA, spectroscopy, and solution chemistry. Passionate about making chemistry accessible.

% Carbon (C)

% Hydrogen (H)

% Oxygen (O)

Known molar mass for molecular formula (g/mol)

Enter values above to see your result

People who used this also calculated…

Related calculators

Molar Mass Calculator

Look up or enter molar mass for common compounds and elements.

Stoichiometry & Reaction Yield

Calculate theoretical yield, actual yield and percent yield from a chemical reaction.

Molarity Calculator

Calculate molar concentration (mol/L) from mass, molar mass and volume.

Was this helpful?

0 found helpful