Math

Ratio Calculator

Calculate missing values in proportions (a:b = c:x). Useful for recipes, scaling, maps, and any ratio-based math problem.

Solve proportions: if a : b = c : x, find x.

Continue with tools that pair well with this one.

Add, subtract, multiply, and divide fractions

Calculate percentages, increases, decreases, and ratios

Convert length, weight, and temperature units

Frequently asked questions

Is this tool free?+

Yes. Every Utilio utility is free with no sign-up, usage limits, or paywalls.

Do you store my data?+

No. Processing happens entirely in your browser. Your input never leaves your device.

Can I use this tool offline?+

Yes. Once the page loads, most tools continue working without an internet connection.