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Convert inches to cm and cm to inches: 1 inch is exactly 2.54 cm. The calculator also understands inch fractions like 3/4, converts feet and inches and screen sizes, and shows you the calculation for every result.
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Result
3.937 Inches
10 cm is 3.937 inches.
Calculation steps
Example result
This is what the results look like. Enter your own values above to see the result instantly.
cm to inches
3.937 Inches
10 cm is 3.937 inches.
As an inch fraction: 3 15/16 inches
Inches to cm
2.54 cm
1 inches is 2.54 cm.
Feet and inches to cm
175.26 cm
5 ft 9 in is 175.26 cm.
Screen size
59.773 × 33.622 cm
A 27-inch screen with a 16:9 aspect ratio measures 59.773 × 33.622 cm (diagonal 68.58 cm).
Why use this inch converter?
How this converter differs from a single input field
Two fields, both directions
Type in the cm or inch field: the other updates instantly, without pressing a button or switching direction.
Enter fractional inches and fractions
Enter 3/4, 3 7/16, or ½ and read inch fractions as you would on a ruler. The result is also available as an inch fraction rounded to 1/8, 1/16, 1/32, or 1/64.
Feet and inches
Convert heights and US measurements such as 5 ft 9 in directly to cm, or convert cm to feet and inches. Twelve inches are correctly converted to one foot.
Screen size in cm
Enter your TV or monitor's diagonal size in inches and select the aspect ratio to get its width and height in cm.
Eight units of length
Millimeters, centimeters, meters, kilometers, inches, feet, yards and miles: convert a length to every unit and swap with one click.
Calculation steps and link
For each result, the calculator shows the formula with your numbers. Copy the result as a sentence or share a link with your values.
How it works
Three steps from length to result.
Step 1
Choose what you want to convert above: centimeters and inches, feet and inches, a screen size, or any length to another unit.
Step 2
Enter a length in either field. Both commas and periods work, inch fractions such as 3/4 or 3 7/16 are recognized, and the other field updates instantly.
Step 3
View the result and calculation, set the decimal places, and copy the result or a link containing your values.
Tables
The most common values at a glance: centimeters, inches, fractional inches, heights, and screen diagonals.
| cm | Inches | Fractional inch |
|---|---|---|
| 1 | 0.39 | 3/8 |
| 2 | 0.79 | 13/16 |
| 3 | 1.18 | 1 3/16 |
| 5 | 1.97 | 1 15/16 |
| 10 | 3.94 | 3 15/16 |
| 15 | 5.91 | 5 7/8 |
| 20 | 7.87 | 7 7/8 |
| 25 | 9.84 | 9 13/16 |
| 30 | 11.81 | 11 13/16 |
| 40 | 15.75 | 15 3/4 |
| 50 | 19.69 | 19 11/16 |
| 60 | 23.62 | 23 5/8 |
| 70 | 27.56 | 27 9/16 |
| 80 | 31.5 | 31 1/2 |
| 90 | 35.43 | 35 7/16 |
| 100 | 39.37 | 39 3/8 |
| Inches | cm | mm |
|---|---|---|
| 1 | 2.54 | 25.4 |
| 2 | 5.08 | 50.8 |
| 3 | 7.62 | 76.2 |
| 4 | 10.16 | 101.6 |
| 5 | 12.7 | 127 |
| 6 | 15.24 | 152.4 |
| 8 | 20.32 | 203.2 |
| 10 | 25.4 | 254 |
| 12 | 30.48 | 304.8 |
| 18 | 45.72 | 457.2 |
| 24 | 60.96 | 609.6 |
| 36 | 91.44 | 914.4 |
| Inches | Decimal | mm |
|---|---|---|
| 1/16 | 0.0625 | 1.59 |
| 1/8 | 0.125 | 3.18 |
| 1/4 | 0.25 | 6.35 |
| 3/8 | 0.375 | 9.53 |
| 1/2 | 0.5 | 12.7 |
| 5/8 | 0.625 | 15.88 |
| 3/4 | 0.75 | 19.05 |
| 7/8 | 0.875 | 22.23 |
| 1 | 1 | 25.4 |
| cm | Feet and inches | Inches |
|---|---|---|
| 150 | 4 ft 11.1 in | 59.06 |
| 160 | 5 ft 3 in | 62.99 |
| 165 | 5 ft 5 in | 64.96 |
| 170 | 5 ft 6.9 in | 66.93 |
| 175 | 5 ft 8.9 in | 68.9 |
| 180 | 5 ft 10.9 in | 70.87 |
| 185 | 6 ft 0.8 in | 72.83 |
| 190 | 6 ft 2.8 in | 74.8 |
| 195 | 6 ft 4.8 in | 76.77 |
| 200 | 6 ft 6.7 in | 78.74 |
| Inches | Diagonal (cm) | Width (cm) | Height (cm) |
|---|---|---|---|
| 24 | 60.96 | 53.13 | 29.89 |
| 27 | 68.58 | 59.77 | 33.62 |
| 32 | 81.28 | 70.84 | 39.85 |
| 43 | 109.22 | 95.19 | 53.55 |
| 50 | 127 | 110.69 | 62.26 |
| 55 | 139.7 | 121.76 | 68.49 |
| 65 | 165.1 | 143.9 | 80.94 |
| 75 | 190.5 | 166.04 | 93.39 |
| 85 | 215.9 | 188.17 | 105.85 |
Conversion
An inch is exactly 2.54 centimeters long. That makes conversion in either direction a single calculation.
Inches to cm
cm = inches × 2.54
Example: 65 inches × 2.54 = 165.1 cm
cm to inches
Inches = cm ÷ 2.54
Example: 10 cm ÷ 2.54 = 3.937 inches
Since the 1959 international yard and pound agreement, the inch has been defined as exactly 25.4 millimeters. The factor 2.54 is therefore a definition, not an approximation like 0.3937 in the other direction.
The inch measurement of a TV or monitor refers to its screen diagonal. A 55-inch TV has a diagonal of 139.7 cm and a screen area of approximately 122 × 68 cm at a 16:9 aspect ratio.
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FAQ
Quick answers for converting inches to cm or cm to inches.
Multiply the measurement in inches by 2.54. So 65 inches is 65 × 2.54 = 165.1 cm. In the calculator, just enter the number in the inches field; the cm field updates instantly, and the calculation appears below.
Divide centimeters by 2.54. 10 cm is 10 ÷ 2.54 = 3.937 inches. If you prefer multiplication, use cm × 0.3937, but that's only an approximation.
One inch is exactly 2.54 cm or 25.4 mm. This has been the international definition since 1959, not a rounded figure. Using 2.5 is only a rough rule of thumb: at 10 inches, you're already off by 0.4 cm (25 instead of 25.4 cm).
Yes. Zoll is the German word for the unit of length called an inch in English. Both mean 2.54 cm, written as in or with the symbol ″, for example 27″ for a 27-inch monitor.
Convert the fraction to a decimal and multiply by 2.54: 3/4 inch is 0.75 × 2.54 = 1.905 cm or 19.05 mm. Enter 3/4 or even 3 7/16 directly into the calculator. It also shows the result as an inch fraction, rounded to the nearest 1/8, 1/16, 1/32 or 1/64.
As a length, 1/2 inch is exactly 12.7 mm, and that's the length this calculator converts. For pipes and threads, however, the inch measurement is a nominal size, not the measured outside diameter: a 1/2-inch pipe thread is considerably thicker than 12.7 mm. Check a thread size chart for threads and fittings.
The inch measurement is the screen diagonal: 55 inches is 55 × 2.54 = 139.7 cm. At 16:9, that's about 122 cm wide and 68 cm high. In the Screen Size tab, you can convert any diagonal in inches for 16:9, 16:10, 21:9, 32:9 and 4:3. If you only know the diagonal in cm, divide it by 2.54 in the cm ⇄ inches tab: 90 cm is 35.43 inches.
One foot equals 12 inches. So 5 feet 9 inches is 5 × 12 + 9 = 69 inches, or 69 × 2.54 = 175.26 cm. The Feet and Inches tab converts both ways and works for heights from the US and UK: for example, 180 cm is 5 ft 10.87 in.
Yes. The All Lengths tab converts between millimeters, centimeters, meters, kilometers, inches, feet, yards and miles, and shows the length in all eight units at once. For example, 1 inch is 25.4 mm.
The calculator uses the exact factor of 2.54; only the displayed result is rounded. Choose between 0 and 4 decimal places, or let the calculator round automatically. You can enter decimals with a comma or period, and it also recognizes inch fractions such as 3/4 or 3 7/16.
No. The conversion runs entirely in your browser; the calculator doesn't send your inputs to a server. To let you share a link, it puts your values in your browser's address bar. “Share link” copies that exact address.
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