Calculator

Scale Conversion Calculator & Scale Factor Calculator

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
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