Free length conversion tools
CM to IN – Unit Conversion Made Easy
Instantly convert centimeters to inches, inches to centimeters, and more.
Centimeters to Inches Converter
Centimeters to inches, calculated exactly and shown to four decimal places.
Decimals and zero are supported. Results use four decimal places.
Common values (cm)
Result
3.937in
10 centimeters equals 3.937 inches.
Inches · shown to 4 decimal places, trailing zeros removed
Formula: inches = centimeters ÷ 2.54
Popular conversions
The conversions people need most
Start with a dedicated converter, each with a formula, worked examples, a reference chart, and answers to common questions.
CM to Inches
Convert centimeters to inches with the exact 2.54 factor. Includes a chart, formula, and examples.
Inches to CM
Go the other way. Turn inches into centimeters for dimensions, plans, and everyday projects.
CM to Feet
Express a centimeter measurement in decimal feet for height, rooms, and construction notes.
CM to Feet and Inches
Get height in whole feet plus remaining inches — for example, 180 cm is 5 ft 10.87 in.
MM to Inches
Convert small metric measurements to inches for parts, materials, and precise dimensions.
Meters to Feet
Convert meters to feet for room sizes, land measurements, and longer distances.
Conversion chart
Centimeters to inches at a glance
Use this quick reference for common centimeter values, from a single centimeter up to two hundred.
- 1 centimeter
- 0.3937 inches
- 1 inch
- 2.54 centimeters
- 100 centimeters
- 39.3701 inches
Chart preview
Rounded to 4 decimals| Centimeters (cm) | Inches (in) |
|---|---|
| 1 | 0.3937 |
| 5 | 1.9685 |
| 10 | 3.937 |
| 20 | 7.874 |
| 50 | 19.685 |
| 100 | 39.3701 |
| 150 | 59.0551 |
| 170 | 66.9291 |
| 180 | 70.8661 |
| 190 | 74.8031 |
| 200 | 78.7402 |
Why use CMtoIN
A converter that stays out of your way
No account, no pop-ups, and no distracting detours. Just the measurement you need, converted correctly.
Instant Results
The result updates as you type. There is no submit button, no reload, and no waiting.
Accurate Conversions
Every result uses the exact international factor of 2.54 centimeters per inch — never a rounded shortcut.
Easy to Use
Preset values, a copy button, a clear button, and a swap control keep the tool simple on any screen.
The formula
The math behind every result
The inch is defined against the centimeter, so the conversion is a single, reliable division — not an approximation.
One inch is exactly 2.54 centimeters. To go from centimeters to inches, divide by 2.54. To go from inches to centimeters, multiply by 2.54. Read the full cm-to-inches guide for worked examples and a mental-math shortcut.
Centimeters to inches
in = cm ÷ 2.54
Divide the centimeter value by 2.54 to get inches.
20 cm ÷ 2.54 = 7.8740 in
Inches to centimeters
cm = in × 2.54
Multiply the inch value by 2.54 to get centimeters.
12 in × 2.54 = 30.48 cm
Worked example
180 ÷ 2.54 = 70.8661
So 180 centimeters equals 70.8661 inches.
In height form: 5 ft 10.87 in
Guides
Understand the numbers, not just the result
Short, practical explanations of the units and formulas behind the calculators.
Answers
CM to inches, answered
The essentials of converting between centimeters and inches, including the exact factor and a common height example.
Have another question? Contact CMtoIN.
How many inches are in 1 centimeter?
One centimeter equals about 0.3937 inches. The exact factor is 1 ÷ 2.54, because one inch is defined as exactly 2.54 centimeters.
How do you convert centimeters to inches?
Divide the number of centimeters by 2.54. For example, 10 cm ÷ 2.54 = 3.9370 inches. Our calculator does this calculation for you and displays the result to four decimal places.
What is 180 cm in inches?
180 centimeters equals 70.8661 inches. In feet and inches, that is approximately 5 feet 10.87 inches.
How many centimeters are in an inch?
There are exactly 2.54 centimeters in one inch. This fixed relationship is used for every centimeter-to-inch conversion on CMtoIN.
Need a conversion right now?
Jump back to the calculator or open the full reference chart.