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CM to Inches
Convert centimeters to inches instantly.
Result
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Convert centimeters to inches instantly
Centimeters are used in most of the world for measuring height, fabric, furniture and screens. Inches are still the everyday unit in the United States and are used for many products worldwide, from TV sizes to pipe and tool dimensions. This converter turns one into the other as you type and lets you swap direction with a single tap.
How to use it
- Type a number in the left box. It is treated as centimeters by default.
- The converted value appears immediately in the right box, along with the full equation and the one-unit rate.
- Use the swap button to convert inches to centimeters instead, or change the unit menus to use other length units such as millimeters, feet or meters.
- Press Copy to copy the result to your clipboard.
The conversion formula
One inch is defined as exactly 2.54 centimeters. That definition was agreed internationally in 1959, so the conversion is exact rather than an approximation.
- Centimeters to inches: inches = centimeters ÷ 2.54
- Inches to centimeters: centimeters = inches × 2.54
Worked examples
To convert 170 cm to inches, divide by 2.54: 170 ÷ 2.54 = 66.93 inches. Since 12 inches make a foot, that is 5 feet 6.9 inches. To go the other way, a 30-inch monitor stand is 30 × 2.54 = 76.2 cm wide.
Quick reference table
| Centimeters | Inches |
|---|---|
| 10 cm | 3.94 in |
| 25 cm | 9.84 in |
| 50 cm | 19.69 in |
| 75 cm | 29.53 in |
| 100 cm | 39.37 in |
| 150 cm | 59.06 in |
| 180 cm | 70.87 in (5 ft 10.9 in) |
| 200 cm | 78.74 in |
Common uses
- Height: converting a height in centimeters to feet and inches for forms, sports or medical records.
- Shopping: checking whether furniture, luggage or a TV from an overseas listing will fit the space you have.
- Sewing and crafts: patterns are often written in one unit and fabric sold in the other.
- Workshop and DIY: matching metric drawings to inch-based tape measures and hardware.
Frequently asked questions
How many centimeters are in an inch?
Exactly 2.54 centimeters.
How do I convert centimeters to feet and inches?
Divide the centimeters by 2.54 to get total inches, then divide by 12. The whole number is the feet, and the remainder is the leftover inches.
Why does my result show so many decimals?
The calculator keeps extra precision so that small measurements are not rounded away. Round the figure to whatever your project needs, for example two decimals for most everyday measurements.