Inches → Centimetres
inches to cm converter
Convert any length in inches to centimetres. Based on the exact factor 1 in = 2.54 cm.
Convert Inches → Centimetres
1 in=2.54 cm·1 cm=0.393701 in
Quick lookup
| Inches (in) | Centimetres (cm) |
|---|---|
| 1 | 2.54 |
| 2 | 5.08 |
| 5 | 12.7 |
| 6 | 15.24 |
| 10 | 25.4 |
| 12 | 30.48 |
| 18 | 45.72 |
| 24 | 60.96 |
| 36 | 91.44 |
| 48 | 121.92 |
| 60 | 152.4 |
| 72 | 182.88 |
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Frequently asked questions
How many cm is 1 inch?+
1 inch equals exactly 2.54 centimetres. This has been the internationally agreed definition since 1959.
How many cm is 12 inches?+
12 inches (1 foot) equals exactly 30.48 cm.
What's the formula?+
Multiply inches by 2.54 to get centimetres. For rough mental maths, multiply by 2.5 and add 2%.
Why is 2.54 exact?+
Because the inch was redefined in 1959 as exactly 0.0254 metres. Before that, the UK and US used slightly different inches.