Geography & Mapping / Map Scale Calculator
Map Scale Calculator
Calculate real-world distance from a measured map distance and scale.
How to use this calculator
What to enter
Enter or select the following as requested: Map distance; Map unit; Scale denominator (1 : N). Follow the units, valid ranges, examples, and options displayed beside each field.
What the result means
The surveying or mapping result is derived from the coordinates, bearings, distances, elevations, or scale entered. Check the coordinate reference system, units, datum, bearing convention, and whether the calculation assumes a flat plane or the Earth’s curvature.
When to use it
Use this for educational or preliminary mapping and survey calculations. Confirm the datum and field measurements, and use qualified survey data for legal boundaries, construction set-out, or other precision work.