Convert Inches to Centimeters

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Inches
Centimeters

Inches

Definition

An inch (symbol: in) is a unit of length in the imperial and US customary systems of measurement. It is defined as exactly 2.54 centimeters.

History/Origin

The inch has its origins in various ancient measurements, including the Roman uncia (meaning 'twelfth part'). The modern standardization of the inch occurred in 1959 when it was internationally defined as exactly 2.54 centimeters.

Current Use

The inch remains the primary unit of length in the United States and is still commonly used in the United Kingdom alongside metric units. It is particularly prevalent in technical drawings, electronics (screen sizes), and construction materials.

Centimeters

Definition

A centimeter (symbol: cm) is a unit of length in the International System of Units (SI), the current form of the metric system. It is defined as 1/100 meters.

History/Origin

A centimeter is based on the SI unit meter, and as the prefix 'centi' indicates, is equal to one hundredth of a meter. Metric prefixes range from factors of 10-18 to 1018 based on a decimal system, with the base (in this case the meter) having no prefix and having a factor of 1.

Current Use

The centimeter, like the meter, is used in all sorts of applications worldwide (in countries that have undergone metrication) in instances where a smaller denomination of the meter is required. Height is commonly measured in centimeters outside of countries like the United States.