Centimeters to Inches Converter
Convert centimeters (cm) to inches (in) instantly. Fast, accurate cm to inches converter with conversion table and formula. Essential for international measurements.
100 cm = 1 meter
12 inches = 1 foot
Quick Conversion Formulas
Common Length Reference Points
Credit Card Width
3.375 inches / 8.57 cm
Average Human Height
5.5-6 feet / 167-183 cm
Football Field
100 yards / 300 feet / 91.4 m
Marathon Distance
26.2 miles / 42.195 km
Conversion History
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Cm to Inches Formula
inches = centimeters ÷ 2.54
How to convert centimeters to inches:
- Take the number of centimeters you want to convert
- Divide by 2.54 (since 1 inch = 2.54 cm exactly)
- The result is the length in inches
Example:
Convert 10 cm to inches:
inches = 10 ÷ 2.54 = 3.94 inches
⚠️ Important Disclaimer
This tool provides estimates for informational purposes only. Results should not be relied upon for important decisions. Always consult with a qualified professional for advice specific to your situation.
Centimeters to Inches Conversion Table
| Centimeters (cm) | Inches (in) | Common Use |
|---|---|---|
| 1 cm | 0.39 in | Small object |
| 2.54 cm | 1 in | Exact conversion |
| 5 cm | 1.97 in | Smartphone width |
| 10 cm | 3.94 in | Notebook width |
| 15 cm | 5.91 in | Ruler |
| 20 cm | 7.87 in | Paper width |
| 30 cm | 11.81 in | Standard ruler |
| 50 cm | 19.69 in | Half meter |
| 100 cm | 39.37 in | 1 meter |
| 150 cm | 59.06 in | Average height (child) |
| 180 cm | 70.87 in | Average height (adult) |
Note: 1 inch = exactly 2.54 centimeters by definition (international standard since 1959).
Understanding Centimeters and Inches
Centimeters (cm)
A centimeter is a metric unit of length equal to one-hundredth of a meter. It's widely used globally for measuring smaller objects, body height, and dimensions.
The centimeter is part of the International System of Units (SI) and is the standard unit for length measurements in most countries worldwide. It provides a convenient scale for everyday measurements.
Common uses:
- Body measurements (height, waist)
- Product dimensions (packaging, electronics)
- School supplies and stationery
- Clothing and fabric measurements
- Scientific and engineering applications
Inches (in)
An inch is an imperial unit of length primarily used in the United States, United Kingdom, and Canada. One inch equals exactly 2.54 centimeters.
Despite being a non-metric unit, inches are still widely used for many commercial and technical applications, especially in countries that use the imperial system.
Common uses:
- Screen sizes (TV, phone, monitor)
- Construction and carpentry
- Automotive parts and specifications
- Plumbing pipe diameters
- US clothing and shoe sizes
Why Convert cm to inches?
Converting between centimeters and inches is essential for:
- International Shopping: Product dimensions often listed in cm outside the US
- Travel: Understanding measurements when visiting different countries
- DIY Projects: Following plans that use different measurement systems
- Education: Science and math problems requiring unit conversions
- Professional Work: Engineering, design, and manufacturing specifications
Frequently Asked Questions
How many inches are in a centimeter?
1 centimeter equals approximately 0.3937 inches. To convert cm to inches, divide the cm value by 2.54 (or multiply by 0.3937).
How do I convert 5 cm to inches?
To convert 5 cm to inches: 5 ÷ 2.54 = 1.97 inches. You can also use our converter above for instant, accurate results.
Is 1 inch exactly 2.54 cm?
Yes! Since 1959, the international inch has been defined as exactly 2.54 centimeters. This is an exact conversion, not an approximation.
How many cm in 12 inches?
12 inches equals exactly 30.48 cm (12 × 2.54). This is a common measurement for rulers and standard paper height in the US.
What's the easiest way to estimate cm to inches?
A quick mental estimate: divide cm by 2.5 (instead of 2.54) for an approximate conversion. For example, 10 cm ÷ 2.5 ≈ 4 inches (actual: 3.94 inches).