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Meters to millimeters

1 meter = 1,000 millimeters

Type a value in meters (m) to get millimeters (mm) straight away. A meter is larger than a millimeter, so the number goes up. Both units belong to length, measured here against the meter.

1 m = 1,000 mm

Formula

mm = m × 1,000

One meter is 1,000 millimeters, so multiply the meter value by that factor. Here m is the value in meters and mm is the result in millimeters.

Worked example: 25 meters × 1,000 = 25,000 millimeters.

Meters to millimeters table

meters (m)millimeters (mm)
1 m1,000 mm
2 m2,000 mm
3 m3,000 mm
4 m4,000 mm
5 m5,000 mm
6 m6,000 mm
7 m7,000 mm
8 m8,000 mm
9 m9,000 mm
10 m10,000 mm
15 m15,000 mm
20 m20,000 mm
25 m25,000 mm
30 m30,000 mm
40 m40,000 mm
50 m50,000 mm
60 m60,000 mm
75 m75,000 mm
100 m100,000 mm

Everyday meters in millimeters

What it ismmm
a long stride1 m1,000 mm
a standard door height (about)2 m2,000 mm
a short-course swimming pool25 m25,000 mm
a sprint race100 m100,000 mm
one lap of an athletics track400 m400,000 mm

Quick estimate in your head

Multiply by 10^3: move the decimal point 3 places right (add 3 zeros).

About the units

Meter (m). The SI base unit of length, defined by the distance light travels in 1/299,792,458 of a second.

Millimeter (mm). One thousandth of a meter. Used for engineering drawings, rainfall and screen sizes in some countries.

Going the other way, 1 millimeter is 0.001 meters.

Questions

How many millimeters are in 1 meter?

1 meter is 1,000 millimeters, and 1 millimeter is 0.001 meters.

How do I convert meters to millimeters?

Use mm = m × 1,000. For example, 25 meters × 1,000 = 25,000 millimeters.

Is the meter to millimeter factor exact?

Yes, the definitions are exact, so the factor is exact. Results here are rounded to 6 significant digits for display.

How much is one lap of an athletics track in millimeters?

400 m is 400,000 mm.

Source for the conversion factor: NIST SP 811, Appendix B (conversion factors).

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