What does Proportion Calculator do?
Solves a/b = c/d with one missing value with steps, exact fraction and decimal; checks whether two ratios form a proportion; simplifies ratios; and covers direct, inverse and recipe/scale problems. Free, no sign-up.
Who should use Proportion Calculator?
Maths students, teachers and parents are the clearest fit based on how the product is positioned.
Best fit
Pricing: Free
How much does Proportion Calculator cost?
Free Check the provider’s own page for the latest pricing, packages and terms.
Directory note
Details, pricing and availability can change. We use provider information, verified owner updates and editorial review where available. Check the provider’s own page before making a purchase, booking or important decision.
Profile last updated 31 Oct 2026.
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