Ratio Calculator

Simplify a ratio or find the missing value in A:B = C:D.

Runs in your browser — nothing is uploaded
Leave one of C or D empty to solve for it.

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How to use Ratio Calculator

  1. Enter A and B.
  2. Enter C or D to solve for the other.
  3. Read the simplified ratio and result.

Questions

How do I scale a recipe or map with ratios?

Enter the original ratio as A:B and the new amount as C; D is the matching scaled amount.