Convert cm to Inches
Convert centimeters to inches instantly — exact factors, common-value table, nothing uploaded.
Common conversions
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Centimeters to inches, without the guesswork
The inch is defined as exactly 2.54 centimeters, so every cm-to-inch conversion is a single division by 2.54 — no approximations involved. 10 cm is 3.937 inches, 50 cm is 19.685 inches, 100 cm is 39.3701 inches, always the same ratio.
This page has the converter preset to centimeters on the left and inches on the right, so you can type a value and read the answer immediately. The table below lists the values people look up most often: clothing sizes, screen diagonals, small hardware lengths.
Nothing is uploaded and nothing is computed on a server — the conversion happens in your browser as you type, so it even keeps working if your connection drops.
Quick conversion table
Common values at a glance — computed locally with exact standard factors.
| Value (cm) | Converted (in) |
|---|---|
| 1 | 0.393701 |
| 2 | 0.787402 |
| 5 | 1.9685 |
| 10 | 3.93701 |
| 25 | 9.84252 |
| 50 | 19.685 |
| 100 | 39.3701 |
How to convert cm to inches
Type the value in cm
Decimals are fine. The result appears as you type — no convert button needed.
Read the result in inches
Results are shown to six significant digits, and the 1:1 formula line beneath shows the exact ratio.
Reverse direction anytime
The round arrow button flips to inches-to-cm without losing your value.
FAQs about this conversion
How many inches is 1 cm exactly?
1 cm = 0.393700787… in, because 1 inch is exactly 2.54 cm. The converter shows 0.393701, rounded to six significant digits.
What is 30 cm in inches?
30 cm = 11.811 in. A quick way to sanity-check: 30 cm is just under a foot (30.48 cm), so the answer should be just under 12 inches.
Is a US inch the same as a UK inch?
Yes. Since 1959 the inch has been standardized internationally at exactly 2.54 cm, so US and UK inches are identical.
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