Inches to Centimetres
Convert inches to centimetres instantly.
Inches to Centimetres (in to cm) Converter
1 inch = 2.54 centimetres
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- 1 in = 2.54 cm
- 5 in = 12.7 cm
- 10 in = 25.4 cm
- 25 in = 63.5 cm
- Centimetrescm
- Inchesin
- Centimetrescm
- Inchesin
How it’s calculated
cm = in × 2.54
- Multiply the value in inches by 2.54.
- To go back, divide by 2.54 (or multiply by 0.3937007874).
- 1 in = 2.54 cm · 1 cm = 0.3937007874 in
Quick examples
1 inch = 2.54 centimetres · 1 cm = 0.3937 in
- 1 inch = 2.54 centimetres
- 5 inches = 12.7 centimetres
- 10 inches = 25.4 centimetres
- 25 inches = 63.5 centimetres
- 100 inches = 254 centimetres
Inches to centimetres conversion table
| Inches (in) | Centimetres (cm) |
|---|---|
| 0.1 in | 0.254 cm |
| 0.5 in | 1.27 cm |
| 1 in | 2.54 cm |
| 2 in | 5.08 cm |
| 3 in | 7.62 cm |
| 4 in | 10.16 cm |
| 5 in | 12.7 cm |
| 6 in | 15.24 cm |
| 7 in | 17.78 cm |
| 8 in | 20.32 cm |
| 9 in | 22.86 cm |
| 10 in | 25.4 cm |
| 15 in | 38.1 cm |
| 20 in | 50.8 cm |
| 25 in | 63.5 cm |
| 30 in | 76.2 cm |
| 40 in | 101.6 cm |
| 50 in | 127 cm |
| 75 in | 190.5 cm |
| 100 in | 254 cm |
| 250 in | 635 cm |
| 500 in | 1,270 cm |
| 1,000 in | 2,540 cm |
About these units
Inch (in)
US & imperial (identical)
1 in = 0.0254 m (exact)
The international inch, defined as exactly 2.54 cm since 1959.
Source: NIST SP 811 / Handbook 44
Centimetre (cm)
SI (metric)
1 cm = 0.01 m (exact)
Defined as exactly 1/100 of a metre.
Source: BIPM SI Brochure (9th ed.)
Frequently asked questions
How do I convert inches to centimetres?
Use cm = in × 2.54. Multiply the value in inches by 2.54.
How many centimetres are in 1 inch?
1 inch (in) equals 2.54 centimetres (cm).
How many inches are in 1 centimetre?
1 centimetre (cm) equals 0.3937 inches (in); more precisely 0.3937007874.
What is 10 in in cm?
10 inches = 25.4 centimetres.
What is a inch?
The international inch, defined as exactly 2.54 cm since 1959.
What is a centimetre?
Defined as exactly 1/100 of a metre.
Related conversions
Formula: cm = in × 2.54. Factors last reviewed 2026-10-27.