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Instant result
The result is updated directly from the data entered.
Online Calculator
Scale Calculator
Use a scale to convert between measurements on a plan, model, or drawing and their real-world size.
Actual measure
500
Use the same unit in both values.
Information
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Local processing
The calculations are done in your browser without sending the values to a server.
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Free
No registration, subscription, or paid API required.
Frequently asked questions
What does a 1: 100 scale mean?
It means one unit on the drawing represents 100 units in real life.
Can I convert a real-world measurement to a drawing measurement?
Yes.
Can I convert a drawing measurement to its real-world size?
Yes.
What units should I use?
The same unit for all measures.