Ratio Simplifier: The Complete Guide
Reduce any ratio to its simplest form. Enter two numbers to get the ratio in lowest terms, the greatest common divisor used, and the decimal equivalent.
Who the Ratio Simplifier is for
Anyone who needs a ratio in its simplest form — aspect ratios, gear ratios, scale models.
How to use the Ratio Simplifier
- Type your values into the fields above — pick your currency or units where the calculator offers them.
- Results update automatically as you type; there's no submit button and nothing is sent to a server.
- Adjust any input to compare scenarios, then copy the result with a single click.
How it works
A ratio is reduced by dividing both terms by their greatest common divisor (GCD). The result is the same ratio expressed with the smallest whole numbers.
Features
- Lowest-terms ratio
- Greatest common divisor
- Decimal value
- Instant result
Why simplify a ratio?
A simplified ratio uses the smallest whole numbers that preserve the proportion, making it far easier to read and compare. Screen resolutions, gear ratios, and map scales are almost always quoted in simplified form. Dividing both numbers by their greatest common divisor does the job in one step.