Scale Calculator
Convert between a model and the real thing it copies. A scale says how many times smaller the model is. A scale of 1 to 24 means each unit on the model stands for 24 units in real life.
- Free
- Works offline after your first visit
- Saves on this device
- No sign-up
- Updated
How it works
To find the real size, multiply the model size by the scale number. To find the model size, divide the real size by the scale number.
Both directions use the same scale number, so the two answers always agree with each other.
Worked example
A model 6 in long at a scale of 1 to 24 is 12 ft in real life. A real length of 12 ft is 6 in on the model.
Questions
What number do I type for 1 to 24?
Type 24. The scale is one unit on the model to that many units of the real thing.
Does this work for areas or volumes?
No. It handles one length at a time. Areas change with the square of the scale and volumes with its cube, so work those out separately.
Which units can I use?
Use any length. Each size is shown in the units you pick, and the other unit system is shown as well.
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