Map scale calculator
Convert map centimetres to real-world metres or the other way round.
How do I use this page?
- Enter values or use the example in the form.
- Choose a mode or units where available.
- Read the result and check the calculation steps below.
What this page does not do: The scale applies at the original map size. Resizing a printout or screen changes ruler measurements.
Further reading
Theory — how does map scale work?
A map scale, for example 1:25000, tells you how many real-world units correspond to one unit on the map. At that scale, a 2 cm segment on the map represents 500 m on the ground. The calculator converts in both directions: from centimetres on the map to real-world metres and back, for example 500 m times 100 divided by 25000 gives 2 cm again. Knowing any two of the three values — the scale, the map distance or the real-world distance — is enough to calculate the third.
Frequently asked questions
How is the result calculated?
What are the limitations?
See also
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