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Map & Scale Calculators

Scale Factor Calculator

Scale factor between two sizes, and how it affects length, area and volume.

Also known as enlargement factor, reduction ratio, scaling calculator.

Enter values

Results update as you type.

Result

Scale factor

2.5 ×

Double the length and you quadruple the area but multiply the volume by eight.

As a ratio
2.5 : 1
Area factor
6.25 ×
Volume factor
15.625 ×
Type
Enlargement
New area
312.5 m²
New volume
468.75 m³

About the Scale Factor Calculator

Scale factor between two sizes, and how it affects length, area and volume.

Also known as: enlargement factor, reduction ratio, scaling calculator, similar figures scale.

How to use this calculator

  1. Enter i know, original area, original volume and the other fields.
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Review the breakdown shown under the main result.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Scale Factor formula

k = new ÷ original · area scales by k², volume by k³

Worked example

Using the values pre-filled in the calculator above:

  • I know: Two sizes
  • Original size = 10
  • New size = 25
  • Original area = 50 m²
  • Original volume = 30 m³

the calculator returns:

  • Scale factor: 2.5 ×
  • As a ratio: 2.5 : 1
  • Area factor: 6.25 ×
  • Volume factor: 15.625 ×