Productive ToolboxInch to Centimeter Converter
Convert inches to centimeters and back, including fractions like 5 3/8 and heights like 5' 10", with charts for common lengths, screens and paper.
Inches to Centimeters
10 in
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Inches to Centimeters: the Formula
Since 1959 the inch has been defined as exactly 25.4 millimeters, so the conversion never needs rounding:
cm = inches × 2.54
inches = cm ÷ 2.54
feet and inches → inches: feet × 12 + inches
Example: a person 5′ 10″ tall is 5 × 12 + 10 = 70 inches, and 70 × 2.54 = 177.8 cm.
Inches to cm Chart
| Inches | cm |
|---|---|
| 1 in | 2.54 |
| 2 in | 5.08 |
| 3 in | 7.62 |
| 4 in | 10.16 |
| 5 in | 12.7 |
| 6 in | 15.24 |
| 7 in | 17.78 |
| 8 in | 20.32 |
| 9 in | 22.86 |
| 10 in | 25.4 |
| 11 in | 27.94 |
| 12 in | 30.48 |
| 15 in | 38.1 |
| 18 in | 45.72 |
| 20 in | 50.8 |
| 24 in | 60.96 |
| 30 in | 76.2 |
| 36 in | 91.44 |
| 48 in | 121.92 |
| 60 in | 152.4 |
| Fraction | cm |
|---|---|
| 1/16 in | 0.159 |
| 1/8 in | 0.318 |
| 1/4 in | 0.635 |
| 3/8 in | 0.953 |
| 1/2 in | 1.27 |
| 5/8 in | 1.588 |
| 3/4 in | 1.905 |
| 7/8 in | 2.223 |
| Height | cm |
|---|---|
| 5′ 0″ | 152.4 |
| 5′ 3″ | 160.02 |
| 5′ 6″ | 167.64 |
| 5′ 8″ | 172.72 |
| 5′ 10″ | 177.8 |
| 6′ 0″ | 182.88 |
| 6′ 2″ | 187.96 |
| 6′ 4″ | 193.04 |
Everyday Sizes in Inches and cm
| Item | Inches | Centimeters |
|---|---|---|
| 24″ monitor (diagonal) | 24 in | 60.96 cm |
| 55″ TV (diagonal) | 55 in | 139.7 cm |
| 65″ TV (diagonal) | 65 in | 165.1 cm |
| US Letter paper | 8.5 × 11 in | 21.59 × 27.94 cm |
| A4 paper | 8.27 × 11.69 in | 21 × 29.7 cm |
| Standard door height (US) | 80 in | 203.2 cm |
Screen sizes are measured corner to corner, not across the width.
How to Convert Inches to cm
- 1Enter inches: Type a length in inches: a decimal (5.375), a fraction as on a tape measure (5 3/8) or a height in feet and inches (5' 10" or 5 ft 10 in).
- 2Read the centimeters: The result appears as you type, multiplied by exactly 2.54, with feet and inches shown for lengths of a foot or more.
- 3Convert the other way: Click the swap button to turn centimeters into inches; the result is also shown to the nearest 1/16 inch and in feet and inches.
- 4Copy or save: Copy the conversion as text or save it to the history on this device.
Frequently Asked Questions
How many centimeters are in an inch?
Exactly 2.54. The international inch was defined in 1959 as 25.4 millimeters, so the conversion is exact rather than rounded. To convert inches to centimeters, multiply by 2.54; to convert centimeters to inches, divide by 2.54.
How do I convert a height like 5 feet 10 inches to cm?
Turn it into inches first (5 × 12 + 10 = 70 inches), then multiply by 2.54: 70 × 2.54 = 177.8 cm. You can type 5' 10" or 5 ft 10 in directly into the converter.
How do I convert fractions of an inch to cm?
Convert the fraction to a decimal and multiply by 2.54: 5 3/8 inches is 5.375 × 2.54 = 13.6525 cm. Type 5 3/8 into the converter and it does both steps.
How many inches is 10 cm?
10 ÷ 2.54 = 3.937 inches, which is just under 3 15/16 inches on a tape measure. The converter shows cm results both as decimals and to the nearest 1/16 inch.
How big is a 55-inch TV in cm?
TV and monitor sizes are measured diagonally, so a 55-inch TV is 139.7 cm across the diagonal. A 65-inch screen is 165.1 cm and a 24-inch monitor is 60.96 cm.
Is an inch the same everywhere?
Yes. The US, UK, Canada, Australia and every other country use the same international inch of 2.54 cm. Only the old US survey foot and inch differed, by about two parts per million, and they were retired from 1 January 2023.
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