Convert Inches to Centimeters
Instantly convert Inches (in) to Centimeters (cm) with our free online calculator.
Formula: in to cm — multiply by 2.54
Reference Table
| Inches (in) | Centimeters (cm) |
|---|---|
| 1 | 2.54 |
| 5 | 12.7 |
| 10 | 25.4 |
| 25 | 63.5 |
| 50 | 127 |
| 100 | 254 |
The inches-to-centimeters conversion is one of the most-searched measurements online — it arises whenever someone buys an imported appliance, sizes an international TV, picks a US-sized outfit online, or measures a child's height for medical records. Exactly 1 inch = 2.54 cm since the 1959 international agreement. TV sizes quoted in inches (55-inch TV = 139.7 cm diagonal) and US paper sizes (US Letter 8.5 × 11 in ≈ 21.59 × 27.94 cm) dominate this traffic. Web developers also convert inches to CSS-relative units like px and cm for print stylesheets.
How to Convert Inches to Centimeters
Formula
To convert Inches (in) to Centimeters (cm): multiply by 2.54
Step-by-Step
- Start with your value in Inches (in).
- Multiply by 2.54 to perform the conversion.
- The result is your value expressed in Centimeters (cm).
Conversion Factor
1 in = 2.54 cm
Reverse Factor
1 cm = 0.393701 in
Worked Example
Convert 25 Inches to Centimeters: 25 in = 63.5 cm
About Inch (in)
An imperial unit of length equal to exactly 1/12 of a foot = 25.4 mm exactly per the 1959 International Yard and Pound Agreement (and equally per NIST SP 811). Inches are the dominant US working unit for: body height ('5 foot 10' = 70 inches; US adult male mean 175 cm = 69 in per CDC NHANES data); screen and TV diagonal sizes (the ubiquitous '55-inch TV', '24-inch monitor', '15.6-inch laptop' product specs are universal globally even in metric markets); paper margins (US Letter 8.5 × 11 inches; Legal 8.5 × 14 inches per ANSI/NISO Z39.18); plumbing pipe diameters in US construction per ASME B36.10M (1/2-inch, 3/4-inch, 1-inch, 1½-inch nominal pipe sizes); thread sizing per ASME B1.1 / ANSI Unified Inch Screw Thread system (1/4-20 UNC, 1/2-13 UNC, 3/8-16 UNC fasteners by inch diameter × threads-per-inch); woodworking + cabinetry (typical lumber 'nominal 2x4' actually 1.5 × 3.5 inches finished); jewelry chain length (16, 18, 20, 24 inches standard necklace lengths); rifle barrel length (typical 16-22 inches rifle, 26-32 inches shotgun); and tire wheel diameter (US-spec 14-22 inch rim). Despite most industries adopting millimeters, inches remain dominant in US manufacturing, woodworking, plumbing, and most consumer electronics. Convert inches to mm by multiplying by 25.4; to cm by multiplying by 2.54.
About Centimeter (cm)
A CGS-system metric unit of length equal to exactly 0.01 m = 10 mm (roughly the width of a standard pencil). The centimeter is the everyday metric-world working unit for human-scale objects: body measurements per WHO + IPMS (adult height 150-200 cm; waist 70-110 cm; shoulder width 35-50 cm; foot length 22-30 cm), clothing sizes per ISO 8559-1 + 8559-2 (chest 80-130 cm; bust 75-120 cm; hip 80-130 cm), household items and furniture (kitchen counter standard 85-90 cm height; dining table 75 cm; standard A4 paper 21.0 × 29.7 cm; ISO B5 17.6 × 25.0 cm), school rulers and stationery (typical 30 cm ruler), bicycle frame sizing (road bike 48-62 cm), and rainfall measurement (1 cm of rain = 10 mm = 10 L/m² volume per unit area). Centimeters bridge the gap between millimeters (too small for human-scale) and meters (too large for body/furniture). Used universally in Europe, Asia, Australia, and Latin America for everyday body + product measurements, with the United States as the major exception. Convert cm to inches by dividing by 2.54; to mm by multiplying by 10.
Quick Facts
- 1 Inch equals 2.54 Centimeters
- 1 Centimeter equals 0.393701 Inches
- Inch is a unit of length & distance
- Centimeter is a unit of length & distance
- This conversion is commonly used in construction, navigation, athletics, and everyday measurement
- The Inch belongs to the imperial system
- The Centimeter belongs to the metric system
Common Inch to Centimeter Conversions
| Inches (in) | Centimeters (cm) |
|---|---|
| 0.1 | 0.254 |
| 0.5 | 1.27 |
| 1 | 2.54 |
| 2 | 5.08 |
| 3 | 7.62 |
| 4 | 10.16 |
| 5 | 12.7 |
| 10 | 25.4 |
| 15 | 38.1 |
| 20 | 50.8 |
| 25 | 63.5 |
| 30 | 76.2 |
| 40 | 101.6 |
| 50 | 127 |
| 75 | 190.5 |
| 100 | 254 |
| 150 | 381 |
| 200 | 508 |
| 250 | 635 |
| 500 | 1270 |
| 1000 | 2540 |
Understanding Inches
The Inch (symbol: in) is a unit of length & distance. An imperial unit of length equal to exactly 1/12 of a foot = 25.4 mm exactly per the 1959 International Yard and Pound Agreement (and equally per NIST SP 811). Inches are the dominant US working unit for: body height ('5 foot 10' = 70 inches; US adult male mean 175 cm = 69 in per CDC NHANES data); screen and TV diagonal sizes (the ubiquitous '55-inch TV', '24-inch monitor', '15.6-inch laptop' product specs are universal globally even in metric markets); paper margins (US Letter 8.5 × 11 inches; Legal 8.5 × 14 inches per ANSI/NISO Z39.18); plumbing pipe diameters in US construction per ASME B36.10M (1/2-inch, 3/4-inch, 1-inch, 1½-inch nominal pipe sizes); thread sizing per ASME B1.1 / ANSI Unified Inch Screw Thread system (1/4-20 UNC, 1/2-13 UNC, 3/8-16 UNC fasteners by inch diameter × threads-per-inch); woodworking + cabinetry (typical lumber 'nominal 2x4' actually 1.5 × 3.5 inches finished); jewelry chain length (16, 18, 20, 24 inches standard necklace lengths); rifle barrel length (typical 16-22 inches rifle, 26-32 inches shotgun); and tire wheel diameter (US-spec 14-22 inch rim). Despite most industries adopting millimeters, inches remain dominant in US manufacturing, woodworking, plumbing, and most consumer electronics. Convert inches to mm by multiplying by 25.4; to cm by multiplying by 2.54.
It belongs to the imperial measurement system.
Inches are commonly used in construction, navigation, athletics, and everyday measurement.
Understanding Centimeters
The Centimeter (symbol: cm) is a unit of length & distance. A CGS-system metric unit of length equal to exactly 0.01 m = 10 mm (roughly the width of a standard pencil). The centimeter is the everyday metric-world working unit for human-scale objects: body measurements per WHO + IPMS (adult height 150-200 cm; waist 70-110 cm; shoulder width 35-50 cm; foot length 22-30 cm), clothing sizes per ISO 8559-1 + 8559-2 (chest 80-130 cm; bust 75-120 cm; hip 80-130 cm), household items and furniture (kitchen counter standard 85-90 cm height; dining table 75 cm; standard A4 paper 21.0 × 29.7 cm; ISO B5 17.6 × 25.0 cm), school rulers and stationery (typical 30 cm ruler), bicycle frame sizing (road bike 48-62 cm), and rainfall measurement (1 cm of rain = 10 mm = 10 L/m² volume per unit area). Centimeters bridge the gap between millimeters (too small for human-scale) and meters (too large for body/furniture). Used universally in Europe, Asia, Australia, and Latin America for everyday body + product measurements, with the United States as the major exception. Convert cm to inches by dividing by 2.54; to mm by multiplying by 10.
It belongs to the metric measurement system.
Centimeters are commonly used in construction, navigation, athletics, and everyday measurement.
Why Convert Inches to Centimeters?
Whether you are travelling internationally, working on a construction project, or studying science, converting between Inches and Centimeters is a task you will encounter regularly. Builders and architects often work with specifications that mix metric and imperial units, while athletes and coaches may need to compare race distances reported in different systems. Having an accurate, instant conversion tool removes guesswork and reduces measurement errors that can be costly in professional settings.
Frequently Asked Questions
How do I convert Inches to Centimeters?
An imperial unit of length equal to exactly 1/12 of a foot = 25. To convert Inches to Centimeters, multiply by 2.54. For example, 25 in equals 63.5 cm.
How many Centimeters are in 1 Inch?
There are 2.54 Centimeters in 1 Inch.
How many Inches are in 1 Centimeter?
There are 0.393701 Inches in 1 Centimeter.
What is the formula for Inch to Centimeter conversion?
The formula is: multiply by 2.54. This means 1 in = 2.54 cm.
Is a Inch bigger than a Centimeter?
No. One Inch is smaller than one Centimeter because 1 in equals 2.54 cm, which is greater than 1.
When do you need to convert between Inches and Centimeters?
A CGS-system metric unit of length equal to exactly 0. Inch and Centimeter are both length units, so conversion comes up whenever one source of information uses one unit and another uses the other — a classic cross-reference challenge in engineering, trade, travel, and everyday life.