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Meters to Millimeters Converter

1 meter is exactly 1,000 millimeters. To convert meters to millimeters, multiply by 1,000.

Sources: BIPM SI Brochure Updated

Result

1 m = 1,000 mm

How to convert meters to millimeters

millimeters = meters × 1,000

The meter is the SI base unit of length. 1 millimeter is one thousandth of a meter (SI prefix milli, 10⁻³).

The factor is exact in both directions: 1 m = 1,000 mm and 1 mm = 0.001 m. Nothing is rounded until you choose how many decimals to show.

Worked example: 1.5 m

  1. Start with the value in meters: 1.5 m.
  2. Multiply by 1,000, because 1 meter = 1,000 millimeters: 1.5 × 1,000 = 1,500 mm.

Meters to millimeters chart

Meters from 1 to 100 converted to millimeters with the exact factor, shown to five significant digits.

Meters to millimeters, part 1 of 4
mmm
11,000
22,000
33,000
44,000
55,000
66,000
77,000
88,000
99,000
1010,000
1111,000
1212,000
1313,000
1414,000
1515,000
1616,000
1717,000
1818,000
1919,000
2020,000
2121,000
2222,000
2323,000
2424,000
2525,000
Meters to millimeters, part 2 of 4
mmm
2626,000
2727,000
2828,000
2929,000
3030,000
3131,000
3232,000
3333,000
3434,000
3535,000
3636,000
3737,000
3838,000
3939,000
4040,000
4141,000
4242,000
4343,000
4444,000
4545,000
4646,000
4747,000
4848,000
4949,000
5050,000
Meters to millimeters, part 3 of 4
mmm
5151,000
5252,000
5353,000
5454,000
5555,000
5656,000
5757,000
5858,000
5959,000
6060,000
6161,000
6262,000
6363,000
6464,000
6565,000
6666,000
6767,000
6868,000
6969,000
7070,000
7171,000
7272,000
7373,000
7474,000
7575,000
Meters to millimeters, part 4 of 4
mmm
7676,000
7777,000
7878,000
7979,000
8080,000
8181,000
8282,000
8383,000
8484,000
8585,000
8686,000
8787,000
8888,000
8989,000
9090,000
9191,000
9292,000
9393,000
9494,000
9595,000
9696,000
9797,000
9898,000
9999,000
100100,000

millimeters = meters × 1,000. Factors: BIPM SI Brochure. unitcheck.net/length/meters-to-millimeters/

Going the other way? Use the Millimeters to Meters converter.

Frequently asked questions

How many millimeters are in 1 meter?

1 meter is exactly 1,000 millimeters. 1 millimeter is one thousandth of a meter (SI prefix milli, 10⁻³).

How do I convert meters to millimeters?

Multiply by 1,000: millimeters = meters × 1,000. For example, 1.5 m = 1,500 mm.

How many meters are in 1 millimeter?

1 millimeter is exactly 0.001 meters. To go the other way, use the millimeters to meters converter.

Is the m to mm conversion exact?

Yes. 1 millimeter is one thousandth of a meter (SI prefix milli, 10⁻³). The factor 1,000 follows from the definitions, so the only rounding is in the number of decimals you display.

Sources