in to cm Converter
Convert between inches and centimeters with instant bidirectional conversion
Length Conversion Calculator
Imperial unit of length
Metric unit of length
Conversion Results
Conversion Formula:
• inches to cm: cm = in × 2.54
• cm to inches: in = cm × 0.3937
Quick Examples
• 1 in = 2.54 cm
• 6 in = 15.24 cm
• 12 in = 30.48 cm (1 ft)
• 1 cm = 0.3937 in
• 10 cm = 3.937 in
• 30.48 cm = 12 in
Common Conversions
Inches to Centimeters
1 in = 2.54 cm
2 in = 5.08 cm
3 in = 7.62 cm
4 in = 10.16 cm
6 in = 15.24 cm
8 in = 20.32 cm
10 in = 25.40 cm
12 in = 30.48 cm
Centimeters to Inches
1 cm = 0.3937 in
2.54 cm = 1 in
5 cm = 1.9685 in
10 cm = 3.937 in
15 cm = 5.906 in
20 cm = 7.874 in
25 cm = 9.843 in
30 cm = 11.811 in
Measurement Systems
Imperial System
Inches (in)
Used in US, UK, and other countries
Metric System
Centimeters (cm)
Used worldwide, based on powers of 10
Practical Uses
Screen and display measurements
Construction and blueprints
Technical drawings and CAD
Clothing and fashion design
Scientific and laboratory work
Understanding in to cm Conversion
What are Inches?
An inch (in) is an imperial unit of length used primarily in the United States and United Kingdom. It's defined as exactly 2.54 centimeters and is commonly used for measuring smaller distances.
What are Centimeters?
A centimeter (cm) is a metric unit of length equal to one hundredth of a meter. It's used worldwide and is part of the International System of Units (SI).
Key Relationships
- •1 inch = exactly 2.54 centimeters
- •1 foot = 12 inches = 30.48 centimeters
- •1 yard = 36 inches = 91.44 centimeters
Conversion Formulas
centimeters = inches × 2.54
inches = centimeters ÷ 2.54
Conversion Tips
- •Multiply inches by 2.5 for quick approximation
- •For exact conversions, use the factor 2.54
- •Remember: inches are larger units than centimeters
Historical Note: The inch was officially defined as exactly 2.54 cm in 1959 by international agreement, making conversions precise and standardized.