Inches to Centimetres Converter
1 inch = 2.54 centimetres.
Enter a value
Result
1 inch =
2.54 cm
1 in × 2.54 = 2.54 cm
1 inch = 2.54 cm exactly · 1 mile = 1.609344 km exactly
The working
- 1. Convert 1 in to metres: 1 × 0.0254 = 0.0254.
- 2. Convert to cm: 0.0254 ÷ 0.01 = 2.54.
1 in in every unit
Handy reference lengths
- A4 sheet (long side)
- 29.7 cm
- Standard door height
- 2.03 m
- Football pitch
- 105 m
- Marathon
- 42.195 km
Conversion table
Inches to Centimetres
| Inches | Centimetres |
|---|---|
| 1 | 2.54 |
| 2 | 5.08 |
| 3 | 7.62 |
| 4 | 10.16 |
| 5 | 12.7 |
| 6 | 15.24 |
| 7 | 17.78 |
| 8 | 20.32 |
| 9 | 22.86 |
| 10 | 25.4 |
| 15 | 38.1 |
| 20 | 50.8 |
| 25 | 63.5 |
| 50 | 127 |
| 100 | 254 |
Centimetres to Inches
| Centimetres | Inches |
|---|---|
| 1 | 0.3937 |
| 2 | 0.7874 |
| 3 | 1.1811 |
| 4 | 1.5748 |
| 5 | 1.9685 |
| 6 | 2.3622 |
| 7 | 2.7559 |
| 8 | 3.1496 |
| 9 | 3.5433 |
| 10 | 3.937 |
| 15 | 5.9055 |
| 20 | 7.874 |
| 25 | 9.8425 |
| 50 | 19.685 |
| 100 | 39.37 |
Formula and worked example
centimetres = inches × 2.54 (1 inch is exactly 2.54 cm).
Convert 12 inches to centimetres: 12 × 2.54 = 30.48 cm.
When you need this
Screens, TVs, phones and laptop sizes are sold in inches almost everywhere, while sewing patterns, furniture listings and school rulers outside the US use centimetres. Converting a 55-inch TV or a 32-inch waist is the most common reason people look this up.
Questions people ask
How many centimetres are in a inch?
One inch is 2.54 centimetres. 1 inch is exactly 2.54 cm.
How do I convert inches to centimetres?
Multiply the number of inches by 2.54.
What is 10 in in cm?
10 inches is 25.4 centimetres.
How do I convert centimetres back to inches?
Multiply by 0.39370079: one centimetre is 0.39370079 inches.
Related conversions
How we calculate this
We use the standard published formula or definition for this calculation, and we show the working so you can check it. Source: NIST Special Publication 811, Guide for the Use of the International System of Units.
Spotted a mistake? Tell us and we'll check it. How we check our calculators