Inches to cm
1 in = 2.54 cm. Type in either box to convert both ways, in exact decimals.
The formula
1 in = 2.54 cm
To convert inches to centimetres, multiply by 2.54.
An inch is defined as exactly 2.54 centimetres (the international inch, agreed in 1959), so this conversion is exact in both directions.
Common values
| Inches | Centimetres |
|---|---|
| 1 | 2.54 |
| 2 | 5.08 |
| 3 | 7.62 |
| 4 | 10.16 |
| 5 | 12.7 |
| 6 | 15.24 |
| 8 | 20.32 |
| 10 | 25.4 |
| 12 | 30.48 |
| 24 | 60.96 |
| 36 | 91.44 |
Worked out by Figure's own converter: every value is exact.
How to use it
Type a number in the top box and the answer appears in the bottom one as you type; type in the bottom box to go the other way. The round button swaps the units, the unit names open every other unit, and the Every unit list shows the same amount in all of them. Sums work in the boxes too. Nothing is uploaded and there is no account.
Good for:
- Screen, TV and monitor sizes, which are sold in inches
- Clothing measurements: waist, inside leg, chest and sleeve
- Photo, paper and picture-frame sizes
- Product dimensions on US and UK shopping sites
- Reading a tape measure marked in the other unit
Questions
How many centimetres is 1 inch?
1 inch is exactly 2.54 centimetres.
Is 1 inch exactly 2.54 cm?
Yes. Since 1959 the international inch has been defined as exactly 25.4 millimetres, which is 2.54 centimetres, so inches and centimetres convert exactly.