Calculadora de Escala
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
real_m = mapa_cm × escala / 100
About this calculator
The Scale Calculator is a practical tool for converting measurements between a map, plan, or technical drawing and the corresponding real-world size. It solves the common problem of interpreting graphic or numeric scales, such as 1:100 or 1:50. Simply enter the measurement on the map (in centimeters) and the indicated scale, and the calculator returns the real distance in meters. The calculation multiplies the map measurement by the scale and divides by 100, according to the formula: real_m = mapa_cm × scale / 100.
When to use this calculator? It is useful for architects, engineers, cartographers, students, and anyone working with floor plans, road maps, scale models, or projects. For example, when measuring a wall on a property plan with a scale of 1:50, you can quickly find its actual length. It is also helpful for calculating distances on trail maps or rural areas, avoiding manual errors.
Important precautions: ensure the scale is correct (e.g., 1:100 means 1 cm on the map equals 100 cm in reality). Remember that the measurement on the map must be in centimeters; if in millimeters, convert first. The calculator assumes the scale is a whole number, without decimals. Additionally, for very large or small scales, the result may be approximate; always verify with the graphic scale on the document.
Frequently asked questions
What does scale 1:100 mean?
It means that 1 centimeter on the map equals 100 centimeters (1 meter) in the real world.
Can I use millimeters for the map measurement?
The calculator expects centimeters. If you have millimeters, divide by 10 before entering.
Does the calculator work for scales like 1:25000?
Yes, it accepts any whole number scale. Just enter the number after the colon (e.g., 25000).
What if I want to convert from real to map?
This calculator only converts from map to real. For the reverse, divide the real measurement (in cm) by the scale and multiply by 100.
Is the result always in meters?
Yes, the result is displayed in meters, which is the most common unit for real distances.