SubjectCalc

chemistry

Chemical Stoichiometry Calculator

Balance a reaction and convert one reactant or product amount into moles, mass, gas volume, or particles for every species.

Calculator

Formula

nᵢ/νᵢ=ξ

Assumptions and limits

  • The selected reaction proceeds completely with the entered equation; gas volume uses the chosen molar volume.

Example

Editable worked example

The calculator starts with an editable example.

Sources

Frequently asked questions

Are my inputs uploaded?

No. This calculator runs locally in your browser. Inputs are placed in a URL only when you explicitly copy a share link.

Why are units converted first?

Canonical units prevent scale errors when inputs use mixed units. The result is converted back to your selected output unit afterward.

Does the result replace professional judgment?

No. The result applies only to the stated model and assumptions. Qualified people should review high-risk engineering, medical, or laboratory decisions.