cm to inches
Convert centimetres to inches, for screens, clothing and DIY.
30 cm is
11.811 in
In every unit
- Millimetres300 mm
- Metres0.3 m
- Kilometres0.0003 km
- Inches11.811 in
- Feet0.984252 ft
- Yards0.328084 yd
- Miles0.000186411 mi
- Nautical miles0.000161987 nmi
Show workings
- Conversion factor1 cm = 0.39370079 in
- Result30 × 0.39370079 = 11.811 in
How to convert centimetres to inches
For clothing sizes, picture frames, DIY measurements and anything sold with measurements in inches.
An inch is exactly 2.54 cm, so divide the centimetres by 2.54.
Quick estimate: Multiply by 0.4 for a rough figure: 30 cm ≈ 12 inches (exactly 11.8).
Worked example
10 centimetres is 3.93701 in (10 × 0.39370079).
Centimetres to inches chart
| cm | in |
|---|---|
| 1 | 0.393701 in |
| 2 | 0.787402 in |
| 5 | 1.9685 in |
| 10 | 3.93701 in |
| 15 | 5.90551 in |
| 20 | 7.87402 in |
| 25 | 9.84252 in |
| 30 | 11.811 in |
| 40 | 15.748 in |
| 50 | 19.685 in |
| 60 | 23.622 in |
| 75 | 29.5276 in |
| 100 | 39.3701 in |
More conversions
Questions
How many inches is 10 cm?
10 centimetres is 3.93701 in.
How many inches is 50 cm?
50 centimetres is 19.685 in.
How many inches is 81 cm?
81 centimetres is 31.8898 in.
How are TV and monitor sizes measured?
Screens are measured diagonally, corner to corner, in inches. An 81 cm screen is a 32-inch screen.