Ratio Calculator
Simplify a ratio to lowest terms or solve a proportion A:B = C:D for the missing value.
About ratios
A ratio compares two quantities. Simplifying divides both sides by the greatest common divisor. Solving a proportion uses cross-multiplication: A:B = C:D โน D = (B ร C) / A.
Frequently Asked Questions
Is the Ratio Calculator free to use?
Yes, the Ratio Calculator is 100% free to use. There are no subscriptions, no sign-ups, and no hidden fees.
Is my data safe when using the Ratio Calculator?
Absolutely. All calculations performed by the Ratio Calculator happen locally in your web browser. We do not store, track, or transmit your inputs or results to any server.
How accurate is the Ratio Calculator?
Our Ratio Calculator uses industry-standard formulas and methodology. You can view the exact formula and calculation logic used in the methodology section above to verify the math yourself.
Can I use the Ratio Calculator on my mobile phone?
Yes! The Ratio Calculator is fully responsive and works seamlessly on all devices including smartphones, tablets, and desktop computers.