⚖️ Ratio Calculator

:=:X
X = 15
Simplest ratio (A:B)2 : 3

Enter a proportion in the form "A:B = C:X" and this tool automatically calculates the value of X. If A and B are whole numbers, it also shows the simplest form of that ratio. Handy for adjusting recipe quantities or calculating map scales.

How to use

  1. Enter the values for A, B, and C.
  2. The value of X is calculated automatically.
  3. If A and B are whole numbers, the simplest form of the ratio is also shown.

FAQ

How is X calculated?

From the proportion A:B = C:X, X is found using X = (B × C) ÷ A.

Can I enter decimal values?

Yes, A, B, and C can all be decimals. The simplest-ratio display only appears when A and B are whole numbers.

What happens if A is 0?

If A is 0 the calculation can't be performed, so no result is shown.