Empirical Formula Finder
Determine the empirical formula of a compound from elemental percent composition. Supports C, H, O, and N.
Inputs
%
%
%
%
Results
Empirical Formula
CH2O
Empirical Formula Weight30.03 g/mol
C Mole Ratio1
H Mole Ratio1.999
O Mole Ratio1
N Mole Ratio0
Total Composition100 %
How to Use This Calculator
- Enter the percentage composition for carbon, hydrogen, oxygen, and nitrogen.
- Percentages must sum to 100% (or close to it with rounding).
- Review the Empirical Formula string and Empirical Formula Weight (g/mol).
- Divide the molecular weight by empirical weight to find the molecular formula multiplier.
Ad Placeholder
Formula
Moles = %element / atomic weight; Ratio = moles / smallest molesRelated Calculators
Stoichiometry Calculator
Calculate product mass from reactant mass using molecular weights and mole ratios. Supports percent yield for practical lab calculations.
Calorimetry Calculator
Calculate heat energy (q) from mass, specific heat capacity, and temperature change using the calorimetry equation q = mcΔT.
Electrochemistry Cell Potential
Calculate electrochemical cell potential using standard reduction potentials and the Nernst equation. Includes Gibbs free energy and equilibrium constant.
Ad Placeholder