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Ratio Simplifier

Reduce a:b to its lowest terms.

Reduce a ratio a:b to its lowest terms by dividing both terms by their greatest common divisor, and report the equivalent decimal value (a / b).

Daniel Oh By Daniel Oh
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

Simplified ratio = (a / gcd(a, b)) : (b / gcd(a, b)).

In depth

Reduce a ratio a:b to its lowest terms by dividing both terms by their greatest common divisor, and report the equivalent decimal value (a / b).