Ratio Calculator

1. Know Ratios: Enter the values for A and B.
2. Target: Enter the known value for C.
3. Calculate: The tool solves for X to keep the ratio constant.

The Ratio Calculator solves "Three Rule" proportions. If you know that A is to B as C is to X, this tool finds X.

It is perfect for scaling recipes (cooking), resizing images (aspect ratio), or creating map scales.