Enter any value in inches and instantly see the result in centimeters. This converter is useful wherever you need to understand imperial measurements in metric: checking a TV screen size, reading European product dimensions, ordering from international stores, or comparing height with metric standards.
The inch is the standard unit of length in the United States and is still widely used in the United Kingdom. Most of the rest of the world uses centimeters, so you need to convert whenever you are dealing with products or information from a metric context: a European store listing product dimensions in centimeters, a foreign contact stating their measurements in metric, or a technical specification that uses SI units.
The most common situations: you want to know how big a 55-inch TV actually is in centimeters, you are comparing your height with a European sizing chart, you are buying shoes from a UK store and want to double-check the fit, or you are reading a furniture catalog that lists dimensions in centimeters.
The formula is simple: one inch is exactly 2.54 cm. To convert inches to centimeters, multiply the number of inches by 2.54. The converter does this the moment you type a value.
On this page you will find an inches-to-cm conversion table, a screen size table for popular TV and monitor diagonals, and a height table converting feet-and-inches to centimeters.
The conversion between inches and centimeters is based on one fixed constant: one inch is exactly 2.54 cm. To convert inches to centimeters, multiply the number of inches by 2.54.
Full formula: centimeters = inches × 2.54. The reverse: inches = centimeters ÷ 2.54.
Example: you want to know how many centimeters a 55-inch TV screen is. Calculation: 55 × 2.54 = 139.70 cm. That is the diagonal, not the width. The width of a 16:9 screen at 55 inches is about 122 cm.
Another example: a contact gives their height as 6 ft 2 in. Convert to inches first: 6 × 12 + 2 = 74 inches. Then multiply: 74 × 2.54 = 187.96 cm, which is approximately 188 cm.
The table below shows popular inch values converted to centimeters, rounded to two decimal places. For exact conversions, use the converter above.
| Inches | Centimeters |
|---|---|
| 0.5 in | 1.27 cm |
| 1 in | 2.54 cm |
| 2 in | 5.08 cm |
| 3 in | 7.62 cm |
| 4 in | 10.16 cm |
| 5 in | 12.70 cm |
| 6 in | 15.24 cm |
| 7 in | 17.78 cm |
| 8 in | 20.32 cm |
| 9 in | 22.86 cm |
| 10 in | 25.40 cm |
| 11 in | 27.94 cm |
| 12 in | 30.48 cm |
| 15 in | 38.10 cm |
| 18 in | 45.72 cm |
| 20 in | 50.80 cm |
| 21 in | 53.34 cm |
| 23 in | 58.42 cm |
| 24 in | 60.96 cm |
| 30 in | 76.20 cm |
| 36 in | 91.44 cm |
| 42 in | 106.68 cm |
| 45 in | 114.30 cm |
| 48 in | 121.92 cm |
| 54 in | 137.16 cm |
| 60 in | 152.40 cm |
| 72 in | 182.88 cm |
| 90 in | 228.60 cm |
Need to convert the other way? Use our <a href="/en/tools/cm-to-inches-converter">cm to inches converter</a>, which has its own table and content dedicated to that direction.
Electronics manufacturers always list screen diagonal in inches. The table below shows how many centimeters each popular size measures. The value refers to the diagonal, not the width.
| Diagonal (inches) | Diagonal (cm) |
|---|---|
| 24 in (desktop monitor) | 60.96 cm |
| 27 in (desktop monitor) | 68.58 cm |
| 32 in (TV / large monitor) | 81.28 cm |
| 40 in (TV) | 101.60 cm |
| 43 in (TV) | 109.22 cm |
| 50 in (TV) | 127.00 cm |
| 55 in (TV) | 139.70 cm |
| 65 in (TV) | 165.10 cm |
| 75 in (TV) | 190.50 cm |
| 85 in (TV) | 215.90 cm |
This table converts common heights from feet and inches (ft in) to centimeters. One foot equals 12 inches, and one inch equals 2.54 cm.
| Height (ft in) | Centimeters |
|---|---|
| 4 ft 11 in (59 in) | 149.86 cm |
| 5 ft 0 in (60 in) | 152.40 cm |
| 5 ft 1 in (61 in) | 154.94 cm |
| 5 ft 2 in (62 in) | 157.48 cm |
| 5 ft 3 in (63 in) | 160.02 cm |
| 5 ft 4 in (64 in) | 162.56 cm |
| 5 ft 5 in (65 in) | 165.10 cm |
| 5 ft 6 in (66 in) | 167.64 cm |
| 5 ft 7 in (67 in) | 170.18 cm |
| 5 ft 8 in (68 in) | 172.72 cm |
| 5 ft 9 in (69 in) | 175.26 cm |
| 5 ft 10 in (70 in) | 177.80 cm |
| 5 ft 11 in (71 in) | 180.34 cm |
| 6 ft 0 in (72 in) | 182.88 cm |
| 6 ft 1 in (73 in) | 185.42 cm |
| 6 ft 2 in (74 in) | 187.96 cm |
| 6 ft 3 in (75 in) | 190.50 cm |
| 6 ft 4 in (76 in) | 193.04 cm |
| 6 ft 5 in (77 in) | 195.58 cm |
| 6 ft 7 in (79 in) | 200.66 cm |
Converting inches to cm comes up in a few typical everyday situations.
One inch is exactly 2.54 cm. This is a defined constant established in 1959 as the international inch standard, so the conversion is always exact.
The formula is: centimeters = inches × 2.54. For example, 10 inches × 2.54 = 25.40 cm. The reverse is: inches = centimeters ÷ 2.54.
15 inches is 15 × 2.54 = 38.10 cm. This value is checked most often for laptops: the popular 15.6-inch diagonal equals 39.6 cm.
6 inches is 6 × 2.54 = 15.24 cm, which is exactly half a foot. This is a typical screen size for large smartphones.
21 inches is 21 × 2.54 = 53.34 cm. Values in this range come up for monitors and cabin suitcases described as 21-inch.
10 inches is 10 × 2.54 = 25.40 cm. It is an easy reference value to remember (one inch times ten) and also a typical tablet screen diagonal.
A 65-inch TV has a screen diagonal of 65 × 2.54 = 165.10 cm. The width of a 16:9 screen at 65 inches is about 144 cm, and the height is about 81 cm. This is one of the most popular sizes for large living room TVs.
5 feet 7 inches converts to inches first: 5 × 12 + 7 = 67 inches. Then 67 × 2.54 = 170.18 cm. So 5 ft 7 in is approximately 170 cm.
5 feet 10 inches is 5 × 12 + 10 = 70 inches, and 70 × 2.54 = 177.80 cm. So a height of 5 ft 10 in is just under 178 cm.
3 inches is 3 × 2.54 = 7.62 cm. The reverse check: 7.62 ÷ 2.54 = 3, so the result is easy to verify.
Quick approximation: multiply inches by 2.5 instead of 2.54. The error is about 1.6%, which is fine for rough estimates. For example, 10 inches × 2.5 = 25 cm (exact value is 25.40 cm). For precise conversions, use the converter.
A standard carry-on at 22 × 14 × 9 inches converts to: 22 × 2.54 = 55.88 cm, 14 × 2.54 = 35.56 cm, 9 × 2.54 = 22.86 cm — approximately 56 × 36 × 23 cm. The linear sum is 22 + 14 + 9 = 45 inches, which is about 114.3 cm.
In everyday use and commerce, 1 inch = 2.54 cm always applies (the international inch established in 1959). The only exception was the US survey inch (2.5400050800 cm), used in geodetic surveys. It was officially retired by the United States in 2023, so today only the value of 2.54 is in use.
Shoe sizes do not have a simple inch-to-cm conversion — each brand and country uses its own scale. In the US, women's sizes run from 4 (about 21.6 cm insole) to 12 (about 28.6 cm), and men's from 6 (about 24.1 cm) to 16 (about 32 cm). The insole length in inches is not the same as the size number. Always check the specific manufacturer's size chart.
A 12-inch ruler is 30.48 cm long — exactly one foot. This is almost the same length as the standard 30 cm ruler used in Europe, with a difference of just 0.48 cm.
Convert feet and inches to centimeters in two steps: first convert everything to inches (feet × 12 + remaining inches), then multiply by 2.54. Example: 5 ft 9 in = 5 × 12 + 9 = 69 inches; 69 × 2.54 = 175.26 cm. The height table on this page shows ready conversions from 4 ft 11 in to 6 ft 7 in.
If you spot an error in the tables or have an idea for improving the converter, get in touch. We reply to every message.
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