OhMyCalc

Scale Model Calculator

Calculate the model size in mm from a real-world measurement and scale ratio.

How to Use the Scale Model Calculator

  1. Enter the real-world size of the object in metres.
  2. Select the scale ratio from the dropdown.
  3. Click Calculate to see the model size, area ratio, and volume ratio.
  4. Use the model size to plan cuts and part dimensions.

Anwendungsfälle

Formel

Model size (mm) = Real size (m) × 1000 / Scale denominator. Area ratio = 1 : Scale². Volume ratio = 1 : Scale³.

Häufig gestellte Fragen

What does 1:72 scale mean?
At 1:72 scale, 1 mm on the model represents 72 mm (7.2 cm) in real life. It is a common scale for aircraft models.
What scale is best for cars?
1:24 and 1:43 are popular car model scales. 1:18 is used for larger, more detailed diecast models.
Is it free?
Yes, all calculators on OhMyCalc are completely free.