Q:

# How many inches are in 12 millimeters?

A:

Twelve millimeters is equal to 0.472 inch. An inch is defined as exactly 25.4 millimeters by the system of imperial units as well as the system of U.S. customary units.

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The word "inch" comes from the Latin word "uncia," which means one-twelfth part. The word "ounce" also originated from the same word. An inch is abbreviated as "in.", and is denoted by either "in." or a double prime. A double prime is approximated by a double quotation mark, which means that 5 inches can be written as 5".

There are 12 inches in a foot, and feet are denoted by a single prime, approximated by an apostrophe. So if a person is 5 feet 6 inches tall, it's written as 5'6". The inch was first defined by the British Weights and Measures Act of 1824, and it was used as a part of a system of units that are known as the imperial system. The imperial system originated from the pre-1824 system known as "English units."

Although the British Weights and Measures Act of 1824 was scheduled to go into effect May 1, 1825, it was not implemented until Jan. 1, 1826. Since 1824, it has been refined and reduced several times.

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## Related Questions

• A:

Eighteen millimeters is equal to approximately 0.70866 inches. Each millimeter is equal to 0.039370 inches. To convert between millimeters to inches, simply multiply the value in millimeters by 0.039370 to obtain the value in inches.

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• A:

One foot is equal to 12 inches; 36 inches is equivalent to 3 feet in length because 36 divided by 12 is three. Converting measurements from feet to inches (and vice versa) is a simple process using multiplication and division.

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A length of 24 centimeters is equal to 9.45 inches. This is roughly equal to the diameter of a basketball or the height of a tiny toy poodle.