Convert inches to centimeters
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.
When do you need to convert inches to centimeters?
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.
How does inches to cm conversion work? Formula and example
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 inch has a fixed value in digital graphics too: the CSS standard assigns it 96 pixels, and photographic printing 300. The inches to pixels converter turns a measurement in inches into pixels at any density you choose.
Inches to centimeters conversion table
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 cm to inches converter, which has its own table and content dedicated to that direction.
TV and monitor screen size – inches to centimeters
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 |
Height in feet and inches converted to centimeters
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 |
When do you need to convert inches to centimeters?
Converting inches to cm comes up in a few typical everyday situations.
TVs, monitors, and screens
Screen diagonals are always listed in inches, regardless of where you buy. A 55-inch TV has a diagonal of 139.70 cm, and a 65-inch model comes to 165.10 cm. Knowing the centimeter value helps you plan the space and estimate the ideal viewing distance when the room measurements are in metric.Height and international comparisons
When comparing height data from US or UK sources with metric-based charts — for example, reading a health study, looking at sports stats, or checking a fitness app — it helps to know the centimeter equivalent. 5 ft 7 in is 170.18 cm, 6 ft 0 in is 182.88 cm, and 6 ft 3 in is 190.50 cm.Clothing and shoe sizes from international stores
European clothing and shoe stores list measurements in centimeters. A shirt collar listed as 40 cm is about 15.7 inches. Shoe size length in Europe is often given in millimeters, but any centimeter value converts directly. Multiply by 2.54 for shoes, shirts, and other garment dimensions.Furniture and building materials
IKEA US catalogs, tools, and building supplies imported from North America list dimensions in inches. A standard 2×4 lumber piece has actual dimensions of 1.5 × 3.5 inches, which is about 3.8 × 8.9 cm. Converting helps you plan projects accurately and avoid measurement errors.
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Content last reviewed: · written and checked by the Arteon team
Frequently asked questions about converting inches to centimeters
How many centimeters is one inch?
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.
What is the formula to convert inches to cm?
The formula is: centimeters = inches × 2.54. For example, 10 inches × 2.54 = 25.40 cm. The reverse is: inches = centimeters ÷ 2.54.
How many cm is 15 inches?
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.
How many cm is 6 inches?
6 inches is 6 × 2.54 = 15.24 cm, which is exactly half a foot. This is a typical screen size for large smartphones.
How many cm is 21 inches?
21 inches is 21 × 2.54 = 53.34 cm. Values in this range come up for monitors and cabin suitcases described as 21-inch.
How many cm is 10 inches?
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.
How many cm is a 65-inch TV?
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.
How many cm is 5 ft 7 in?
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.
How many cm is 5 ft 10 in?
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.
How many cm is 3 inches?
3 inches is 3 × 2.54 = 7.62 cm. The reverse check: 7.62 ÷ 2.54 = 3, so the result is easy to verify.
How do I convert inches to cm without a calculator?
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.
How many cm is a 22 × 14 × 9-inch carry-on bag?
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.
Is 1 inch always 2.54 cm, or are there exceptions?
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.
How do I convert shoe sizes from inches to cm?
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.
How many cm is a 12-inch ruler?
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.
How do I convert feet and inches to centimeters?
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.
Have a question or suggestion?
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