CM to Inches Converter
Convert centimeters to inches instantly in your browser. Divide by 2.54 — or just type a value and read the exact inch equivalent below.
How to convert cm to inches
- Type the number of centimeters into the box above.
- The inch value updates live — no button to press.
- Switch either unit with the dropdowns to convert between any metric and imperial length.
The formula
Inches are found by dividing centimeters by 2.54:
inches = centimeters ÷ 2.54
Because an inch is defined as exactly 2.54 cm, the reverse also holds: centimeters = inches × 2.54.
Common cm to inches values
| Centimeters | Inches |
|---|---|
| 1 cm | 0.3937 in |
| 5 cm | 1.9685 in |
| 10 cm | 3.937 in |
| 20 cm | 7.874 in |
| 30 cm | 11.811 in |
| 100 cm | 39.37 in |
Related tools
- Inches to CM converter — go the other way.
- MM to Inches converter — for smaller measurements.
Frequently asked questions
- How do I convert centimeters to inches?
- Divide the number of centimeters by 2.54. For example, 10 cm ÷ 2.54 = 3.937 inches. The converter above does this instantly as you type.
- How many inches are in a centimeter?
- One centimeter equals about 0.3937 inches. Put another way, it takes 2.54 centimeters to make a single inch.
- Is the centimeter-to-inch relationship exact?
- Yes. Since 1959 an inch has been defined as exactly 2.54 centimeters, so the conversion is exact rather than an approximation — no rounding is baked into the factor itself.
- What is 10 cm in inches?
- 10 cm is 3.937 inches (10 ÷ 2.54). A quick mental estimate is "just under 4 inches".
- How do I convert a height like 170 cm to feet and inches?
- First convert to inches: 170 ÷ 2.54 ≈ 66.93 in. Then divide by 12 for feet — 66.93 in is about 5 feet 6.9 inches.
- Are my numbers sent anywhere?
- No. The conversion runs entirely in your browser with JavaScript. Nothing you type is uploaded, logged or stored on a server.