Rule of Three Calculator

Solve direct and inverse rule of three problems instantly. Calculate cross-multiplications, step-by-step solutions, unit rates, and compound proportions with ease.

Last updated:
Embed

Put this Rule of Three Calculator on your website

Free to embed. Customise the colours and styling to match your brand — no coding required.

  • Free
  • Customisable
  • Takes < 1 minute
Customise & Embed →

This calculator has not yet been enriched with detailed documentation.