Length converter
Inches to Centimeters
Inches and Centimeters measure the same quantity in different unit systems. The relationship is 1 in = 2.54 cm, which gives 2.54 cm per in. Below you can convert any value, check a worked example and read the full chart.
Formula 1 in = 2.54 cm
Need the other direction? Centimeters to Inches.
How to convert Inches to Centimeters
The inch is defined as exactly 2.54 centimetres, which anchors the whole imperial length system. The centimetre is one hundredth of a metre and is common in clothing and furniture sizes.
To convert Inches to Centimeters, multiply the value in in by 2.54. For example, 10 in × 2.54 = 25.4 cm. This works because the ratio between the two units is constant for every value in length.
Worked examples
| in | cm |
|---|---|
| 1 in | 2.54 cm |
| 2.5 in | 6.35 cm |
| 5 in | 12.7 cm |
| 10 in | 25.4 cm |
| 25 in | 63.5 cm |
| 50 in | 127 cm |
| 100 in | 254 cm |
Reverse conversion
| cm | in |
|---|---|
| 1 cm | 0.39370079 in |
| 5 cm | 1.968504 in |
| 10 cm | 3.937008 in |
| 25 cm | 9.84252 in |
| 50 cm | 19.685039 in |
| 100 cm | 39.370079 in |
When this conversion is useful
This is the calculation you need when you are working across metric and imperial measurements, shopping abroad or reading a spec sheet. Because the factor is fixed, you can use the same number for a single measurement or for a batch: 1,000 in is 2,540 cm.
Is the conversion exact?
Yes for practical use: the factors come from international definitions, with rounding applied only for display.
Reference: BIPM SI Brochure and NIST SP 811. Last reviewed: 2026-11-01.
in to cm conversion chart
The chart lists the most requested values. For a value that is not here, use the converter at the top of the page.
| Inches (in) | Centimeters (cm) |
|---|---|
| 1 in | 2.54 cm |
| 2 in | 5.08 cm |
| 3 in | 7.62 cm |
| 4 in | 10.16 cm |
| 5 in | 12.7 cm |
| 6 in | 15.24 cm |
| 7 in | 17.78 cm |
| 8 in | 20.32 cm |
| 9 in | 22.86 cm |
| 10 in | 25.4 cm |
| 11 in | 27.94 cm |
| 12 in | 30.48 cm |
| 13 in | 33.02 cm |
| 14 in | 35.56 cm |
| 15 in | 38.1 cm |
| 16 in | 40.64 cm |
| 17 in | 43.18 cm |
| 18 in | 45.72 cm |
| 19 in | 48.26 cm |
| 20 in | 50.8 cm |
| 21 in | 53.34 cm |
| 22 in | 55.88 cm |
| 23 in | 58.42 cm |
| 24 in | 60.96 cm |
| 25 in | 63.5 cm |
| 26 in | 66.04 cm |
| 27 in | 68.58 cm |
| 28 in | 71.12 cm |
| 29 in | 73.66 cm |
| 30 in | 76.2 cm |
| 31 in | 78.74 cm |
| 32 in | 81.28 cm |
| 33 in | 83.82 cm |
| 34 in | 86.36 cm |
| 35 in | 88.9 cm |
| 36 in | 91.44 cm |
| 37 in | 93.98 cm |
| 38 in | 96.52 cm |
| 39 in | 99.06 cm |
| 40 in | 101.6 cm |
| 41 in | 104.14 cm |
| 42 in | 106.68 cm |
| 43 in | 109.22 cm |
| 44 in | 111.76 cm |
| 45 in | 114.3 cm |
| 46 in | 116.84 cm |
| 47 in | 119.38 cm |
| 48 in | 121.92 cm |
| 49 in | 124.46 cm |
| 50 in | 127 cm |
| 60 in | 152.4 cm |
| 70 in | 177.8 cm |
| 80 in | 203.2 cm |
| 90 in | 228.6 cm |
| 100 in | 254 cm |
Frequently asked questions
How many Centimeters are in 1 Inches?
1 in equals 2.54 cm.
How do I convert Inches to Centimeters?
Multiply the in value by 2.54. Example: 25 in = 63.5 cm.
What is 2.5 in in cm?
2.5 in = 6.35 cm.
Is the in to cm conversion exact?
Yes for practical use: the factors come from international definitions, with rounding applied only for display.
Does the calculator work offline?
Yes. The conversion runs in your browser with JavaScript, so it works after the page has loaded, even without a connection.