How to convert centimeters to inches
To convert a measurement in centimeters to inches, multiply the value by 0.3937007874. The conversion factor comes from the relationship between both units and the meter (the SI base unit of length).
For example, to convert 5 cm to inches: 5 × 0.3937007874 = 1.968504 in.
What is a centimeter?
A centimeter is a metric unit of length equal to one hundredth of a meter (0.01 m) or approximately 0.394 inches. Introduced as part of the metric system in 1795, the centimeter is derived from the Latin 'centum' (hundred). It remains widely used in everyday measurements despite the SI preference for meters.
Common uses of centimeters include: Human height measurement in most countries; Clothing and body measurements; Screen sizes and display dimensions; Medical measurements (wound size, tumor size).
What is a inch?
An inch is an imperial unit of length equal to 1/12 of a foot or exactly 25.4 millimeters. Originally defined as the width of a man's thumb, later standardized as three barleycorns laid end to end. Since 1959, defined internationally as exactly 25.4 mm.
Common uses of inches include: Screen and display sizes (TV, phone, monitor diagonals); Screw, bolt, and pipe sizing; Tire rim diameter specifications; Woodworking and carpentry precision.
When you need to convert centimeters to inches
Buying electronics, clothing, or furniture from international retailers often requires converting centimeters to inches. Screen sizes, waist measurements, and shelf dimensions frequently cross this boundary.
Centimeters to inches worked examples
Here are some common values converted:
1 cm = 0.3937007874 in 5 cm = 1.968504 in 10 cm = 3.937008 in 50 cm = 19.685039 in 100 cm = 39.370079 in
Frequently asked questions
How many inches are in one centimeter?
One centimeter (cm) equals 0.3937007874 inches (in). Multiply any value in centimeters by 0.3937007874 to convert to inches.
How do I convert centimeters to inches?
Multiply the value in centimeters by 0.3937007874. For example, 5 cm × 0.3937007874 = 1.968504 in.
How do I convert inches to centimeters?
Multiply the value in inches by 2.54, or divide by 0.3937007874. Use the swap button on the converter above to reverse the direction.
Is the centimeter to inch conversion exact?
Yes, the conversion is exact. Since 1959, one inch is defined as exactly 25.4 mm (the international yard and pound agreement), so all metric-imperial length conversions use exact factors.
What is the formula for centimeters to inches?
The formula is: in = cm × 0.3937007874. This is derived from the definition of both units relative to the meter (the SI base unit of length).