Inches to CM
Convert inches to centimetres instantly — fast, free and private.
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Inches to Centimetres Conversion Table
1 in = 2.54 cm · 1 cm = 0.3937 in
An inch is defined as exactly 2.54 centimetres, so inches × 2.54 gives you centimetres. The reverse direction uses the rounded factor 0.393701. Rounding matches the converter above: 4 decimal places.
cm = in × 2.54 · in = cm × 0.393701
| Inches (in) | Centimetres (cm) |
|---|---|
| 0.5 | 1.27 |
| 1 | 2.54 |
| 2 | 5.08 |
| 3 | 7.62 |
| 4 | 10.16 |
| 6 | 15.24 |
| 8 | 20.32 |
| 10 | 25.4 |
| 12 | 30.48 |
| 20 | 50.8 |
| 24 | 60.96 |
| 30 | 76.2 |
| 40 | 101.6 |
| 50 | 127 |
| 60 | 152.4 |
| Centimetres (cm) | Inches (in) |
|---|---|
| 0.1 | 0.0394 |
| 1 | 0.3937 |
| 2 | 0.7874 |
| 3 | 1.1811 |
| 5 | 1.9685 |
| 10 | 3.937 |
| 15 | 5.9055 |
| 20 | 7.874 |
| 21 | 8.2677 |
| 29.7 | 11.6929 |
| 30 | 11.811 |
| 40 | 15.748 |
| 50 | 19.6851 |
| 60 | 23.6221 |
| 80 | 31.4961 |
| 100 | 39.3701 |
| 120 | 47.2441 |
| 150 | 59.0552 |
| 180 | 70.8662 |
| 200 | 78.7402 |
Typical uses: monitor and TV diagonals, wheel rim sizes, photo prints, and screw thread diameters.
How to Use
- 1
Type a value in the Inches field.
- 2
The equivalent in centimetres appears instantly — no button needed.
- 3
Clear the field and type a new value to convert again.
Examples
Convert 12 inches
Input
12Output
30.48 cmConvert 70 inches
Input
70Output
177.8 cmFAQ
How many centimetres is 1 inch?
1 inch = 2.54 cm exactly.
How is the result rounded?
To 4 decimal places.
Do you store the values I type?
No — the conversion runs locally and nothing is sent to a server.