Tools / Scale calculator (maps & models)
Scale calculator: maps, plans & models
Enter the scale 1:x and one length. To find the scale, enter both lengths and leave the scale empty.
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🔒 Runs entirely in your browser – nothing you enter is uploaded or stored.
How to use it
- Enter the scale (e.g. 25000).
- Enter the length on the map or the real length.
- Read the other value.
Your inputs live only in the link, not on our server.
Last checked: October 2026. Found a mistake? Use the form below – we fix confirmed errors and update the date.
Frequently asked questions
What does 1:25,000 mean?
1 cm on the map equals 25,000 cm = 250 m in reality.
How do I find the scale?
Divide the real length by the map length in the same unit.