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Map & Scale Calculators

Scale Factor Calculator

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

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.

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 ×