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Inches to Centimeters
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Inches to Centimeters — quick reference

1 in = 2.54 cm
Common Inches to Centimeters conversions
in cm
1 in 2.54 cm
2 in 5.08 cm
3 in 7.62 cm
5 in 12.7 cm
10 in 25.4 cm
20 in 50.8 cm
25 in 63.5 cm
50 in 127 cm
100 in 254 cm
250 in 635 cm
500 in 1270 cm
1000 in 2540 cm
// about this tool

Inches to Centimeters Online

Updated 2026-08-19

Convert inches to centimeters online for free. Enter a length in inches and SnapTools shows the exact value in centimetres instantly, in your browser — nothing is uploaded.

One inch is exactly 2.54 centimetres, so you multiply inches by 2.54. For quick reference: 1 in = 2.54 cm, 5 in = 12.7 cm, 10 in = 25.4 cm, 12 in (a foot) = 30.48 cm, and 36 in (a yard) = 91.44 cm. Enter any value above for the precise figure, or use the full Length Converter for metres, feet, and more.

// how to use

  1. 1 Type a length in inches into the input.
  2. 2 SnapTools shows the value in centimetres instantly as you type.
  3. 3 Copy the result, or open the Length Converter for other units.

// examples

A foot in inches
Input
12
Output
30.48
Round number
Input
5
Output
12.7

// common uses

Converting inch measurements to metric for tools or parts Following US patterns or plans in centimetres Sizing furniture, screens, or fabric in cm Checking a height given in inches

// faq

Is my input uploaded to a server?
No. The conversion runs entirely in your browser, so nothing you enter leaves your machine.
How many centimetres are in an inch?
Exactly 2.54 centimetres, by the 1959 international definition of the inch. So you multiply inches by 2.54 to get centimetres.
How do I convert inches to cm quickly?
Multiply by 2.54, or estimate by multiplying by 2.5 and adding a little. 10 inches is 25.4 cm. This tool gives the exact value.
How many cm is a foot?
A foot is 12 inches, which is exactly 30.48 cm. Enter 12 above to see it.
Is the conversion exact?
Yes. Because the inch is defined as exactly 2.54 cm, the result is exact, not a rounded approximation.

// works with your data

Centimeters to Inches Feet to Meters Miles to Kilometers Length Converter PX to REM Converter

Use this via API

Get a free API key → 
curl -X POST https://thesnaptools.com/api/v1/tools/inches-to-cm \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"value":"12"}'