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Ratio calculator

Simplify a whole-number ratio and see each share.

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Ratio calculator processes your input in this browser. Inputs and results are excluded from analytics. Recent tools save tool names, visit counts and last-visit times. Saved tools store only their names. Draft saving is optional and stays on this device; delete saved text with the draft controls. Loading text from a URL is optional and contacts that server; its URL and your IP address are visible to the server. An optional “Use in” action keeps a handoff in this tab. The next tool removes it on arrival and ignores it if more than a minute has passed.

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Answer

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Divide both quantities by their greatest common factor to simplify a ratio. Each share divides a quantity by the combined total.

More results
Precision and calculation record
Rounding changes displayed numbers, not the calculation. Text, fractions, matrices and CSV schedules keep their own formatting. Automatic keeps up to 12 significant digits, with money shown to cents where applicable.
Saved scenario
Save the current answer, then change an input to compare. This clears when you leave.
Formula and assumptions
Enter nonnegative whole-number quantities. A ratio describes relative parts; it is not a conversion between different units.
Automatic precision shows numbers to 12 significant digits. Thousands separators such as 1,000 are accepted; use a dot for decimals.
Scratch calculator
Use +, −, ×, ÷, parentheses and %. A percentage is divided by 100. This does not change the main tool.
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Links include your inputs and settings. Anyone with the link can see them, so leave out private text. Files and generated results are left out; random draws run again.
Keyboard shortcuts
Updated 
Using Ratio calculator
Divide both quantities by their greatest common factor to simplify a ratio. Each share divides a quantity by the combined total.
Enter nonnegative whole-number quantities. A ratio describes relative parts; it is not a conversion between different units.
Next: Modulo calculator
A worked example
With first whole-number quantity = 24, second whole-number quantity = 36, the simplified ratio is 2:3.
Next: Proportion calculator
Next: Coffee to water ratio calculator
Before you use the result
Enter nonnegative whole-number quantities. A ratio describes relative parts; it is not a conversion between different units.
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ToolOctopus. “Ratio calculator.” Updated 2026-09-26. https://tooloctopus.com/ratio-calculator.
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