Centimeters to Inches (cm to in) Converter
A fast, bidirectional converter for centimeters, inches, and feet. Enter a value in any of the first three fields to see all values update instantly.
How to Convert Centimeters to Inches
Converting from centimeters (cm) to inches (in) is simple once you know the exact conversion factor. For height, it's also useful to convert the total inches into feet and inches.
The Exact Formula: CM to Inches
The international standard for the inch is exactly **2.54 centimeters**.
To convert from cm to inches, you divide your centimeter value by 2.54. Alternatively, you can multiply by the reciprocal (1 / 2.54), which is 0.3937007874.
- Formula:
Inches = Centimeters / 2.54 - Example:
10 cm / 2.54 = 3.937... inches
How to Convert CM to Feet and Inches
This is the most common reason for this conversion, usually for height. The process has two steps:
- Convert CM to Total Inches: First, get the total inches by dividing by 2.54.
Example:180 cm / 2.54 = 70.866 inches - Convert Total Inches to Feet and Inches: There are 12 inches in one foot.
- Divide the total inches by 12. The whole number is your **feet** (
70.866 / 12 = 5.9..., so **5 feet**). - The decimal remainder (0.9055...) multiplied by 12 gives the remaining **inches** (
0.9055... × 12 = 10.866 inches).
- Divide the total inches by 12. The whole number is your **feet** (
Therefore, 180 cm is equal to **5' 10.87"** (or 5 feet, 10 7/8 inches).
CM to Inches Quick Conversion Chart
| Centimeters (cm) | Inches (Decimal) | Feet & Inches (approx.) |
|---|---|---|
| 1 cm | 0.39 in | 0' 0 25/64" |
| 5 cm | 1.97 in | 0' 1 31/32" |
| 10 cm | 3.94 in | 0' 3 15/16" |
| 30 cm | 11.81 in | 0' 11 13/16" |
| 50 cm | 19.69 in | 1' 7 11/16" |
| 100 cm | 39.37 in | 3' 3 3/8" |
| 150 cm | 59.06 in | 4' 11 1/16" |
| 180 cm | 70.87 in | 5' 10 7/8" |
Frequently Asked Questions (FAQ)
Is 1 inch 2.5 or 2.54 cm?
The official, internationally defined conversion is **1 inch = 2.54 cm** exactly. Using 2.5 cm is only a rough approximation and should not be used for accurate measurements.
What is 1 cm in inches (fraction)?
1 cm is equal to 0.3937 inches. As a fraction, this is approximately **25/64"** (twenty-five sixty-fourths of an inch).
What is 5cm in inches?
5 cm is equal to 1.9685 inches. As a fraction, this is just under 2 inches, or approximately **1 31/32"**.
Formula (LaTeX) + variables + units
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- NIST — Weights and measures — nist.gov · Accessed 2026-01-19
https://www.nist.gov/pml/weights-and-measures - NIST — SI units — nist.gov · Accessed 2026-01-19
https://www.nist.gov/pml/owm/metric-si/si-units
Last code update: 2026-01-19
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