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Scale Factor Calculator

Free scale factor calculator to calculate scale factor. Instant results in your browser — no signup.

Also known as: Calculate scale factor, scale factor calculator, scaling ratio, enlargement factor, reduction factor, calculate scale factor calculator, calculate scale factor, ratios math

Direct calculator

Inputs

Results update when you click Calculate.

Scale factor

2.5000

Enlargement

k = scaled / original = 25.00 / 10.00

Percent change

150.00%

Ratio

25.00 : 10.00

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What this result means

Free scale factor calculator to calculate scale factor. Instant results in your browser — no signup. Scale factor k = scaled length ÷ original length.

Assumptions

  • Rule dependency: Universal formula.

How is it calculated?

Scale factor k = scaled length ÷ original length.

Example

10 → 25 gives scale factor 2.5 (150% increase).

Frequently asked questions

Area scale?+

Multiply area by k² when lengths scale by k.