Millimeters Conversion

Tape measures can be used to measure units of length, and a calculator can be used to convert to another unit

The millimeter is a unit used to measure length. Use one of the conversion calculators below to convert to another unit of measure, or read on to learn more about millimeters.

Millimeter Conversion Calculators

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US Customary & Imperial Units
SI Units

Millimeter Definition and Usage

One millimeter is equal to one-thousandth (1/1,000) of a meter, which is defined as the distance light travels in a vacuum in a 1/299,792,458 second time interval.

The millimeter, or millimetre, is a multiple of the meter, which is the SI base unit for length. In the metric system, "milli" is the prefix for 10-3. Millimeters can be abbreviated as mm, for example 1 millimeter can be written as 1 mm.

Millimeters are often represented by the smallest ticks on most metric rulers. To get a reference point of the size, the thickness of a US dime is 1.35mm.[1]

Millimeters Measurement Conversion Table

Common millimeter values and equivalent imperial and metric length measurements
millimeters miles yards feet inches kilometers meters centimeters micrometers nanometers
1 mm 0.00000062137 mi 0.001094 yd 0.003281' 0.03937" 0.000001 km 0.001 m 0.1 cm 1,000 µm 1,000,000 nm
2 mm 0.0000012427 mi 0.002187 yd 0.006562' 0.07874" 0.000002 km 0.002 m 0.2 cm 2,000 µm 2,000,000 nm
3 mm 0.0000018641 mi 0.003281 yd 0.009843' 0.11811" 0.000003 km 0.003 m 0.3 cm 3,000 µm 3,000,000 nm
4 mm 0.0000024855 mi 0.004374 yd 0.013123' 0.15748" 0.000004 km 0.004 m 0.4 cm 4,000 µm 4,000,000 nm
5 mm 0.0000031069 mi 0.005468 yd 0.016404' 0.19685" 0.000005 km 0.005 m 0.5 cm 5,000 µm 5,000,000 nm
6 mm 0.0000037282 mi 0.006562 yd 0.019685' 0.23622" 0.000006 km 0.006 m 0.6 cm 6,000 µm 6,000,000 nm
7 mm 0.0000043496 mi 0.007655 yd 0.022966' 0.275591" 0.000007 km 0.007 m 0.7 cm 7,000 µm 7,000,000 nm
8 mm 0.000004971 mi 0.008749 yd 0.026247' 0.314961" 0.000008 km 0.008 m 0.8 cm 8,000 µm 8,000,000 nm
9 mm 0.0000055923 mi 0.009843 yd 0.029528' 0.354331" 0.000009 km 0.009 m 0.9 cm 9,000 µm 9,000,000 nm
10 mm 0.0000062137 mi 0.010936 yd 0.032808' 0.393701" 0.00001 km 0.01 m 1 cm 10,000 µm 10,000,000 nm
11 mm 0.0000068351 mi 0.01203 yd 0.036089' 0.433071" 0.000011 km 0.011 m 1.1 cm 11,000 µm 11,000,000 nm
12 mm 0.0000074565 mi 0.013123 yd 0.03937' 0.472441" 0.000012 km 0.012 m 1.2 cm 12,000 µm 12,000,000 nm
13 mm 0.0000080778 mi 0.014217 yd 0.042651' 0.511811" 0.000013 km 0.013 m 1.3 cm 13,000 µm 13,000,000 nm
14 mm 0.0000086992 mi 0.015311 yd 0.045932' 0.551181" 0.000014 km 0.014 m 1.4 cm 14,000 µm 14,000,000 nm
15 mm 0.0000093206 mi 0.016404 yd 0.049213' 0.590551" 0.000015 km 0.015 m 1.5 cm 15,000 µm 15,000,000 nm
16 mm 0.0000099419 mi 0.017498 yd 0.052493' 0.629921" 0.000016 km 0.016 m 1.6 cm 16,000 µm 16,000,000 nm
17 mm 0.000010563 mi 0.018591 yd 0.055774' 0.669291" 0.000017 km 0.017 m 1.7 cm 17,000 µm 17,000,000 nm
18 mm 0.000011185 mi 0.019685 yd 0.059055' 0.708661" 0.000018 km 0.018 m 1.8 cm 18,000 µm 18,000,000 nm
19 mm 0.000011806 mi 0.020779 yd 0.062336' 0.748031" 0.000019 km 0.019 m 1.9 cm 19,000 µm 19,000,000 nm
20 mm 0.000012427 mi 0.021872 yd 0.065617' 0.787402" 0.00002 km 0.02 m 2 cm 20,000 µm 20,000,000 nm

References

  1. United States Mint, Coin Specifications, https://www.usmint.gov/learn/coin-and-medal-programs/coin-specifications

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