Scale Conversion & Scale Factor Calculator
Scale Ratio
1 :
or
Example: For a scale of 1:100, one unit on the scale represents 100 units in real life.
Measurement
Output Settings
Result
— Enter values and click Calculate —
Reference Information
Common Scale Notations:
- 1:100 means 1 unit on drawing = 100 units in real life
- 1/4" = 1' is architectural scale (1:48)
- 1:87 is HO scale model trains
- 1:24,000 is a USGS topographic map
Scale Factor Formulas:
- Scale Factor = Real Size ÷ Model Size
- Model Size = Real Size ÷ Scale Factor
- Real Size = Model Size × Scale Factor
- Area Scale Factor = (Linear Scale Factor)²
- Volume Scale Factor = (Linear Scale Factor)³