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Math

Scale Factor Calculator

Find the scale factor between two lengths.

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How it works

Fill in the 2 fields above and Scale Factor Calculator calculates the result instantly, recalculating as you change any value. The math runs locally in your browser — nothing is sent to a server.

Examples

  • Original 5, Scaled 15 → Scale factor: 3×

Frequently asked questions

How do I use the Scale Factor Calculator?

Enter your values in the 2 input fields and the result is calculated automatically as you type. Change any value to see the numbers update instantly.

Is my data private?

Yes. The Scale Factor Calculator runs entirely in your browser. Nothing you enter is uploaded, saved to a server, or shared — it never leaves your device.

Is the Scale Factor Calculator free?

Yes, it is completely free with no sign-up, no limits and no watermarks. Like every tool on math and the rest of the platform, you can use it as often as you like.

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