Gezidao

Ratio Calculator

Solve A:B = C:X for the missing value.

Fill any three values — X is solved automatically.

: = : —

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AHow to use

  1. 01 Enter any three values in A : B = C : X.
  2. 02 X is solved automatically (X = C × B ÷ A).
  3. 03 Change any number and the answer follows.

QFAQ

How is X calculated? ＋

Cross-multiplication: X = C × B ÷ A. A must be non-zero, otherwise the proportion cannot be solved.

Can I scale an image with this? ＋

Yes — put the original dimensions in A and B, the new width in C, and X is the matching height that keeps the aspect ratio.

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