Inches to Centimeters Converter
Convert inches to centimeters instantly with our free online tool. Perfect for tailoring, screen sizes, and product dimensions.
Length ConverterThe quick answer for 1 Inches — type any value below for the exact result
Inches
Centimeters
in to cm Conversion Formula
To convert inches to centimeters, multiply the inch value by 2.54. Since 1959, one inch has been internationally defined as exactly 2.54 centimeters.
Inches and Centimeters Explained
Inches (in)
The inch is a US customary and imperial unit of length equal to exactly 2.54 centimeters — one twelfth of a foot. It is the standard unit for screens, pipes, bolts, lumber, and rainfall in the United States, and it divides naturally into the halves, quarters, and eighths that workshop measurement favors. From phone displays to pizza diameters, the inch is how America sizes the objects of daily life, and international buyers constantly translate it.
Where it is used: Dominant in US retail sizing, machining, plumbing, and display marketing; still common in UK trades alongside metric.
Origin: From the Roman "uncia" (a twelfth part); English kings variously fixed it by barleycorns and thumb widths until the 1959 international agreement set exactly 2.54 cm.
Centimeters (cm)
The centimeter is a metric unit of length equal to one hundredth of a meter — 0.393701 inches, so about 2.54 centimeters fill one inch. It is the standard unit for clothing measurements, medical charts, furniture dimensions, and school rulers across nearly the entire world. Products sold into metric markets must carry centimeter dimensions, and anything measured in inches — screen diagonals, wrench openings, photo prints — gets converted to centimeters at the border.
Where it is used: Everyday measuring unit for body size, tailoring, healthcare, and consumer products in all metric countries.
Origin: Introduced with the French metric system of 1795, from the Latin "centum" (hundred); the SI confirmed the cm symbol in 1960.
Inches to Centimeters Conversion Table
| Inches (in) | Centimeters (cm) |
|---|---|
| 0.25 in | 0.635 cm |
| 0.5 in | 1.27 cm |
| 0.75 in | 1.905 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 |
| 8 in | 20.32 cm |
| 10 in | 25.4 cm |
| 12 in | 30.48 cm |
| 16 in | 40.64 cm |
| 18 in | 45.72 cm |
| 24 in | 60.96 cm |
| 36 in | 91.44 cm |
| 48 in | 121.92 cm |
| 60 in | 152.4 cm |
Centimeters to Inches Conversion Table
| Centimeters (cm) | Inches (in) |
|---|---|
| 1 cm | 0.3937007874 in |
| 2 cm | 0.7874015748 in |
| 5 cm | 1.968503937 in |
| 10 cm | 3.937007874 in |
| 15 cm | 5.905511811 in |
| 20 cm | 7.874015748 in |
| 25 cm | 9.842519685 in |
| 30 cm | 11.811023622 in |
| 40 cm | 15.7480314961 in |
| 50 cm | 19.6850393701 in |
| 60 cm | 23.6220472441 in |
| 100 cm | 39.3700787402 in |
Inches to Centimeters in Everyday Objects
Common real-world examples that make Inches and Centimeters easy to picture at a glance.
| Inches (in) | Centimeters (cm) | |
|---|---|---|
| A US quarter diameter | 0.955 in | 2.4257 cm |
| A credit card width | 3.37 in | 8.5598 cm |
| A dollar bill length | 6.14 in | 15.5956 cm |
| A letter paper long side | 11 in | 27.94 cm |
| A subway footlong sandwich | 12 in | 30.48 cm |
| A bowling pin height | 15 in | 38.1 cm |
When You Need Inches to Centimeters Conversions
Fitting a TV in a European Cabinet
US product pages tout a 65-inch OLED, but the Italian media console lists its bay as 145 cm. Converting 65 in to 165.1 cm rules it out and points you to the 55 in set (139.7 cm) instead.
Ordering Lumber for EU Plans
An American workshop blog calls for 8-inch-wide cedar boards. Your Austrian timber yard sells 20 cm planks — converting 8 in to 20.32 cm shows the metric stock runs a hair narrow but planes down fine.
Reading US Sewing Patterns
A vintage pattern asks for 22-inch zipper tape. Converting 22 in to 55.88 cm means the German notions shop's 60 cm zip gets trimmed to length rather than coming up short.
Buying Wheels and Tires Overseas
Rim diameters stay in inches worldwide, but fitment guides in Europe quote overall tire diameter in centimeters. Converting a 32-inch tire to 81.28 cm checks clearance against the 82 cm wheel arch spec.
Related Length Conversions
How to Use
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1
Enter Your Inch Value
Type the measurement in inches — for example, enter 15.6 for a 15.6-inch laptop screen
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2
See the cm Equivalent
The result appears instantly: 15.6 in = 39.624 cm — the diagonal screen measurement in metric
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3
Copy or Reverse
Copy the result to your clipboard or click Swap to convert centimeters back to inches
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4
Use the Reference Table
Check the table for common values like 12 in = 30.48 cm or 24 in = 60.96 cm
Why Use Be Converter?
Instant Conversion
Get precise inch to centimeter results in real-time as you type — no waiting for page reloads
International Standard Accuracy
Uses the exact factor of 2.54 cm per inch, the international standard agreed upon in 1959
Handy Conversion Table
Common inch measurements at a glance — from 1/4 inch to 36 inches — for quick reference
Swap with One Click
Toggle between inches and centimeters instantly — essential when working with mixed-unit specifications
Free & No Signup
No registration, no limits. Convert as many measurements as you need for work or personal projects
Fully Private
All calculations happen locally in your browser. No data is ever sent to any server
Frequently Asked Questions
How many centimeters are in 1 inch?
How do I convert inches to cm manually?
What is 6 inches in centimeters?
Why is the inch defined as 2.54 cm exactly?
How do I convert fractional inches to centimeters?
How many centimeters is a 55-inch TV?
How many inches is 100 centimeters?
How do I convert shoe sizes from inches to cm?
About Inches to Centimeters Converter
Our free online inches to centimeters converter provides instant, accurate length conversions for any application. Whether you are shopping for electronics with screen sizes listed in inches, following a sewing or woodworking pattern from the US, measuring for furniture in a metric country, or working on engineering drawings with mixed units, this tool delivers precise results. The inch is primarily used in the United States, while centimeters are standard in most of the world, making this conversion critical for international commerce.
Expert Tips for in to cm Conversion
Since 1959, 1 inch has been defined as exactly 2.54 centimeters by international agreement among the US, UK, Canada, Australia, New Zealand, and South Africa.
For quick mental conversion, multiply inches by 2.5 for a close estimate. For example, 8 inches ≈ 20 cm (actual: 20.32 cm). This is accurate to within 1.6%.
Screen sizes are always measured diagonally in inches worldwide. A 13-inch laptop has a 33.02 cm diagonal, and a 55-inch TV has a 139.7 cm diagonal.
In woodworking, common lumber dimensions in inches convert to: 1×4 = 2.54×10.16 cm, 2×4 = 5.08×10.16 cm, and 4×8 (sheet goods) = 10.16×20.32 cm — though actual dimensions are slightly smaller.
For tire sizes, the rim diameter in inches must convert to cm for metric specifications. A 17-inch rim = 43.18 cm, and an 18-inch rim = 45.72 cm.