inches to cm Converter
Unit Converter
Instant · Precise · Universal
32 units available
6 categories total
How to Convert Inch to Centimeter
To convert inches to cm: multiply by 2.54. To convert cm to inches: divide by 2.54.
1 in = 25.4 mm = 2.54 cm = 1/12 ft = 1/36 yd.
For example, 1 Inch (in) = 2.54 Centimeter (cm).
Inch to Centimeter — Common Values
| Inch (in) | Centimeter (cm) |
|---|---|
| 0.1 | 0.254 |
| 0.5 | 1.27 |
| 1 | 2.54 |
| 2 | 5.08 |
| 5 | 12.7 |
| 10 | 25.4 |
| 25 | 63.5 |
| 50 | 127 |
| 100 | 254 |
| 500 | 1270 |
| 1000 | 2540 |
About Inch (in)
Definition
The inch is a unit of length in the imperial and US customary systems, defined as exactly 25.4 millimeters.
Mathematical Relationship
1 in = 25.4 mm = 2.54 cm = 1/12 ft = 1/36 yd.
Conversion Formula
To convert inches to cm: multiply by 2.54. To convert cm to inches: divide by 2.54.
Practical Applications
Screen sizes (TVs, monitors), drill bit sizes, pipe diameters, screw dimensions, and rainfall measurement in the US.
Interesting Facts
King Edward II of England defined the inch as 'three grains of barley, dry and round, placed end to end' in 1324.
Common Mistakes
Forgetting that fractions of an inch use powers of 2 (1/2, 1/4, 1/8, 1/16), not decimal subdivisions like metric.
Educational Tips
Your thumb from tip to first knuckle is roughly 1 inch — a handy (literal) reference.
About Centimeter (cm)
Definition
The centimeter is a unit of length equal to one hundredth of a meter (10⁻² m), or 10 millimeters.
Mathematical Relationship
1 cm = 0.01 m = 10 mm = 0.3937 inches. There are 2.54 cm in one inch.
Conversion Formula
To convert cm to inches: divide by 2.54. To convert inches to cm: multiply by 2.54.
Practical Applications
Measuring height, waist circumference, screen sizes, furniture dimensions, and map scales.
Interesting Facts
The CGS system was the primary scientific system for over a century. 1 cm is roughly the width of an adult fingernail.
Common Mistakes
Confusing cm and inches — a common error in international contexts. Always verify which system a measurement uses.
Educational Tips
Your fingernail width is roughly 1 cm — a handy mental reference that's always available.