Scale Calculator

Your details

Pick what you want to calculate. The two other inputs become the knowns.
The denominator N of the ratio 1:N. A 1:50,000 map means 1 unit on the map equals 50,000 units in reality.
The length as it appears on the map or model.
Real-world distance
1.5

The actual physical size from the scaled measurement

Unitkm
Scaled measurement3
Scaled unitcm
Scale ratio1:50,000
Scale factor0.00002
Scale factor (decimal)0.00002

Scale 1:50,000

  • 3 cm on the map equals 1.5000 km in the real world.
  • At 1:50,000, 1 unit on the map equals 50,000 of the same units in reality.
  • This is a very small scale (large N) used for world or continental maps where a lot of detail is compressed into a small space.

Next stepTo reverse the calculation, switch the mode selector above and reuse the same scale ratio.

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