ManyConvert inches to cm
1 inch = 2.54 centimeters. Type a value below for an instant inches to cm conversion, or use the table for common values.
| Inches | Centimeters |
|---|---|
| 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 |
| 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 |
How inches convert to centimetres
One inch is exactly 2.54 centimetres — a definition fixed by international agreement in 1959, not a rounded measurement. So cm = inches × 2.54.
In your head: multiply by 2.5, then add a little. For 40 inches, 40 × 2.5 is 100, and the true answer is 101.6 cm.
Feet and inches to centimetres
For a height such as 5 ft 8 in, first turn it all into inches — 5 × 12 + 8 = 68 — and then multiply: 68 × 2.54 = 172.72 cm. Converting the feet and the inches separately and adding gives the same result.
Screen sizes
The size of a screen is its diagonal in inches, wherever in the world it is sold.
| Screen | Inches | Centimetres |
|---|---|---|
| Phone | 6.1 | 15.5 |
| Laptop | 13.3 | 33.8 |
| Laptop | 15.6 | 39.6 |
| Monitor | 27 | 68.6 |
| Television | 43 | 109.2 |
| Television | 55 | 139.7 |
| Television | 65 | 165.1 |
The diagonal is not the width. A 55-inch television with the usual 16:9 shape is about 122 cm wide and 68 cm tall, so measure the wall or the cabinet against those figures rather than against 140 cm.
Fractions of an inch
Tools, pipes and timber are sized in fractions: ¼ in is 0.635 cm, ½ in is 1.27 cm and ¾ in is 1.905 cm. Convert the fraction to a decimal before typing it in — ⅜ becomes 0.375.
Convert inches to cm quickly and accurately with this free tool. 1 inch = 2.54 centimeters. Need the other direction? Centimeters to Inches. For every other unit, use the full ManyHand Unit Converter.
How do I convert inches to cm?
Multiply the number of inches by 2.54. For example, 10 in = 25.4 cm. You can also type any value in the converter above.
What is 1 inch in centimeters?
1 inch equals 2.54 centimeters. Conversely, 1 centimeter equals 0.3937008 inches.
Is this inches to cm converter free?
Yes. It's free with no sign-up, works on phone and desktop, and runs entirely in your browser.