Do I need to sign up?

No. The tool works without an account.

Are my data uploaded?

Compatible operations run locally in the browser.

The scale factor is scaled size ÷ original size. A factor of 2 means twice as large; 0.5 means half.

Yes. Useful for models, drawings, maps, or any proportional scaling.

Calculate the scale factor between an original size and a scaled size.

Result

Factor: 2

Percentage: 200%

factor = scaled / original

Original sizeScaled size

The scale factor shows how much an object has been enlarged or reduced. 1 = same size, >1 enlargement, <1 reduction.

Examples

10 → 20 = factor 2 (200%)

100 → 75 = factor 0.75 (75%)

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Recommended next step

After using Scale Factor Calculator, continue with Color Contrast Calculator.

Tools selected to complete the same task.

4 steps

Tool guide

Practical information to understand the result and use this tool correctly.

Calculate the scale factor between an original size and a scaled size.

The tool runs directly in the browser for immediate results.

Do I need to sign up?: No. The tool works without an account.
Are my data uploaded?: Compatible operations run locally in the browser.
What is a scale factor?: The scale factor is scaled size ÷ original size. A factor of 2 means twice as large; 0.5 means half.
Can I use it for maps or models?: Yes. Useful for models, drawings, maps, or any proportional scaling.