CHEMISTRY / CHEMICAL FORMULAS

Empirical Formula Ratio Calculator

Convert three elemental mass percentages to normalized mole ratios for empirical-formula analysis. Inspect the chemical equation, substituted inputs, unit basis, assumptions, and result in one guided workspace.

01 Calculated in this tab
02 Values stay in this browser tab
03 Use boundary

Use boundary

Calculation path

Convert three elemental mass percentages to normalized mole ratios for empirical-formula analysis. The page evaluates the displayed equation from your supplied values and presents both symbolic and substituted KaTeX working so the arithmetic can be checked.

Calculation path

r_i=(w_i/M_i)/min(w/M)

What you provide

Element 1 mass percent expressed in %, using the same scenario as the other inputs
Element 1 atomic mass expressed in g/mol, using the same scenario as the other inputs
Element 2 mass percent expressed in %, using the same scenario as the other inputs
Element 2 atomic mass expressed in g/mol, using the same scenario as the other inputs
Element 3 mass percent expressed in %, using the same scenario as the other inputs
Element 3 atomic mass expressed in g/mol, using the same scenario as the other inputs

What you receive

Element 1 normalized ratio from the stated equation
A symbolic formula plus substituted working with your values
Visible assumptions, field guidance, and an authoritative learning reference

Use boundary

Choose the maximum decimal places shown. This does not increase source accuracy.

Ratios are not automatically rounded; inspect whether all values are close to defensible small whole-number multiples.

Use internally consistent units and retain extra precision when carrying the result into another calculation.

Reviewed reference factors

OpenStax Chemistry 2e

Empirical Formula Ratio Calculator

Calculation path

What you provide

What you receive

Choose the maximum decimal places shown. This does not increase source accuracy.

Reviewed reference factors

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