MM to Meters Converter

Convert millimeters to meters as you type. Type in either box, or switch to any other length unit.

LiveLengthm = mm ÷ 1,000URL: /mm-to-meters

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About millimeters and meters

Length units appear on building plans, maps, product dimensions, height and distance. The US uses inches, feet, yards and miles day to day; most other countries and all science use metres.

This converter changes millimeters (mm) into meters (m) instantly. You can also type in the second box to convert backwards, or pick any other length unit from the menus.

Formula

m = mm ÷ 1,000 1 mm = 0.001 m 1 m = 1,000 mm

Both units are defined in metres: 1 millimeter = 0.001 metre, and 1 meter = 1 metre. Dividing one by the other gives the factor above.

Worked example

To convert 12 mm: 12 × 0.001 = 0.012 m.

Notes and assumptions

Results use exact defined factors and are rounded only for display (up to 6 significant digits, or the decimals you choose).

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millimeters to meters

Millimeters to meters conversion table

mmm
1 mm0.001 m
2 mm0.002 m
3 mm0.003 m
4 mm0.004 m
5 mm0.005 m
6 mm0.006 m
7 mm0.007 m
8 mm0.008 m
9 mm0.009 m
10 mm0.01 m
12 mm0.012 m
15 mm0.015 m
20 mm0.02 m
mmm
25 mm0.025 m
30 mm0.03 m
40 mm0.04 m
50 mm0.05 m
60 mm0.06 m
70 mm0.07 m
75 mm0.075 m
80 mm0.08 m
90 mm0.09 m
100 mm0.1 m
250 mm0.25 m
500 mm0.5 m
1,000 mm1 m

How to convert by hand

  1. Take the value in millimeters.
  2. Multiply it by 0.001.
  3. Round only at the end.

Common mistakes

  • Rounding the factor too early. 2.54 cm per inch is exact; don’t use 2.5.
  • Writing 5.5 feet as 5 ft 5 in. It’s 5 ft 6 in.

Sources

Frequently asked questions

How many meters are in one millimeter?

1 mm = 0.001 m.

How do I convert millimeters to meters?

Multiply by 0.001 (or divide by 1,000). Example: 10 mm = 0.01 m.

How do I convert meters back to millimeters?

Divide by 0.001. Press the swap button in the converter.

About this tool

Written by
[Author: to be assigned]
Reviewed by
Formula tests passed · human review pending
Last updated
31 Oct 2026

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