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Q: A: ### Quick Answer

**Since there are 25.4 millimeters in an inch, 10 millimeters is equal to 0.3937 inches, or a little over one-third of an inch.** Another common equivalent of an inch in the metric system is 2.54 centimeters.

Since one millimeter is 0.1 centimeters, 10 millimeters is equal to 1 centimeter. Figuring out what 1 centimeter is in terms of inches requires simply dividing one by 2.54. Converting within the metric system is typically easy and is often accomplished by moving a decimal point. For instance, 10 millimeters is equal to 0.1 decimeters and 0.01 meters. Converting between the metric system and the system used in the United States is more difficult and frequently requires mixed numbers.

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- Q:
## How big is 5 millimeters?

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Full Answer >**A length of 5 millimeters is equivalent to 0.1969 inches, or slightly less than 1/5 of an inch.**A millimeter is a unit equal to 1/1000 of a meter, so 5 millimeters make up 1/200 of a meter.Filed Under: - Q:
## How big is 12 millimeters?

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Full Answer >**A length of 12 millimeters is equivalent to about 0.47 inches, or slightly less than half an inch.**The diameter of a dime is about 18 millimeters, so 12 millimeters is about two-thirds of the distance across the face of a dime.Filed Under: - Q:
## How long is 3 centimeters?

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Full Answer >**A centimeter is the equivalent of 25/64 inch, and 3 centimeters is the equivalent of 1 3/16 inches.**Centimeters are the smallest unit of the metric system, which is a widely used measurement system that has been adopted around the globe. The United States is the only industrialized nation in the world that has yet to adopt the metric system as its own, although it was officially sanctioned for use in 1866.Filed Under: - Q:
## How wide is 3 millimeters?

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Full Answer >**Three millimeters in width is approximately one-tenth of an inch.**A penny is just over 1.5 millimeters, making 3 millimeters about the width of two pennies.Filed Under: