Ratio Calculator
Calculator ToolsSolve and simplify ratios
Embed this tool on your websiteFree
- Choose how tall the frame should be.
- Press Copy code.
- Paste it into your page, blog, WordPress or Notion HTML block.
The tool runs inside your visitor's browser, nothing is uploaded, and a small "Powered by ToolCloak" line stays under it. The second line (script) is optional: it makes the frame fit the tool's height.
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History
All history →Ratio Calculator — at a glance
Reduce any ratio to its simplest form and find the missing number in a proportion.
How to use it — step by step
Two numbers A and B for the ratio, and optionally a third number C to find D.
Enter your values
Fill in the boxes. Sensible example values are already filled in for you.
Calculate Ratio
Press the button. The answer is worked out instantly on your device.
Read or copy the result
See the big answer and the extra details, then press Copy to keep them.
Pro tips
Small things that make the result better.
Quick facts
Frequently Asked Questions
Can I use decimals?+
Yes. They are converted to a whole-number ratio before simplifying.
What does D mean?+
D is the missing number that keeps the same ratio: A : B = C : D.
Is my data safe?+
Yes. Everything runs inside your own browser. Your text, files and images are never uploaded to any server.