Calculate the scale: It's easy

Online tools for calculating scales

The fastest way to calculate or convert scales online.

Enter the measure in scale calculation and you will receive the result immediately. This tool also calculates floor plans or technical drawings.
With Rechenonline you can calculate scales and distances on maps.

Scales can of course also be calculated yourself. First of all, you should understand what exactly the numbers are.

If you see a 1:40 scale, it means that your model or drawing is 40 times smaller than the original. If your model is larger, the high number is at the front. In this example, 1 cm of the model represents 40 cm of the original.
Measure the required dimensions and then convert them to the same unit. For example: Your model is 200 cm long and the original is 50 m. The conversion factor from meter to centimeter is 100. Multiply 50 m by 100 cm. The result is 5, 000 cm.
Now divide the value of the original by the value of the model: 5, 000 cm: 200 cm = 25. So 1 cm of your drawing corresponds to 25 cm of the original. The scale is 1:25.

On your drawing you have the 1:25 scale.

Measure the important dimensions on the drawing and write them down. As an example we take height 20 cm, width 25 cm and depth 15 cm.
Now that you know that 1 cm on your drawing corresponds to 25 cm in reality, you can easily convert the noted values.
All you have to do is multiply the measured value by the scale: height 20 cm x 25 = 500 cm, width 25 cm x 25 = 625 cm, depth 15 cm x 25 = 375 cm.
The results of this calculation reflect the original dimensions. The object, which was 20x25x15 cm in size on your drawing and was given a scale of 1:25, is therefore 500x625x375 cm in size in the original.
If you now want to make a drawing, make sure when calculating that your scale is now based on the original.
If the drawing is to be 1:10, your conversion scale is 10: 1. The original height is 500 cm. The conversion would be 500 cm: 10 = 50 cm. The height on the drawing in 1:10 scale is therefore 50 cm.