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Calculator Tools
Ratio & Proportion Calculators

Scale Ratio Calculator

Convert between real and scaled sizes using a scale ratio like 1:50 or 1:24, or find the scale from two lengths.

Enter values

Results update as you type.

Result

Scaled size

24

Step-by-stepShow
  1. 1,200 ÷ 50

About the Scale Ratio Calculator

Convert between real and scaled sizes using a scale ratio like 1:50 or 1:24, or find the scale from two lengths.

Also known as: scale factor ratio, scale conversion, model scale ratio, 1:100 scale.

How to use this calculator

  1. Enter find.
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Open “Step-by-step” to see how the answer was worked out.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Formula

Scaled = Real ÷ k (for a 1:k scale)

Worked example

Using the values pre-filled in the calculator above:

  • Find: Scaled size from real size
  • Scale 1 : = 50
  • Real size = 1,200

the calculator returns:

  • Scaled size: 24

Working

  1. 1,200 ÷ 50