How many meters are in 1 millimeter?

1 mm equals 0.001 m. This is an exact conversion factor defined by NIST.

How do I convert millimeters to meters?

Multiply the value in mm by the conversion factor. For example, 10 mm = 0.01 m. Use our calculator above for instant results.

Is the millimeters to meters conversion exact?

Yes, this conversion is mathematically exact based on the international definition of these units (NIST SP 811).

Can I convert millimeters to meters offline?

Yes! OmniConvert runs entirely in your browser — no internet connection needed after the page loads. Your data never leaves your device, ensuring complete privacy.

What is the difference between millimeters and meters?

Millimeters (mm) and Meters (m) are both units of length but belong to different measurement systems. 1 mm = 0.001 m. Use the converter above to switch between them instantly.

Millimeters to Meters (mm → m) — Free Online Converter

mm → m Reference Table

mm	m
0.001 mm	0.000001 m
0.002 mm	0.000002 m
0.003 mm	0.000003 m
0.004 mm	0.000004 m
0.005 mm	0.000005 m
0.006 mm	0.000006 m
0.007 mm	0.000007 m
0.008 mm	0.000008 m
0.009 mm	0.000009 m
0.01 mm	0.00001 m
0.02 mm	0.00002 m
0.03 mm	0.00003 m
0.04 mm	0.00004 m
0.05 mm	0.00005 m
0.06 mm	0.00006 m
0.07 mm	0.00007 m
0.08 mm	0.00008 m
0.09 mm	0.00009 m
0.1 mm	0.0001 m
0.2 mm	0.0002 m
0.3 mm	0.0003 m
0.4 mm	0.0004 m
0.5 mm	0.0005 m
0.6 mm	0.0006 m
0.7 mm	0.0007 m
0.8 mm	0.0008 m
0.9 mm	0.0009 m
1 mm	0.001 m
1.5 mm	0.0015 m
2 mm	0.002 m
2.5 mm	0.0025 m
3 mm	0.003 m
3.5 mm	0.0035 m
4 mm	0.004 m
4.5 mm	0.0045 m
5 mm	0.005 m
5.5 mm	0.0055 m
6 mm	0.006 m
6.5 mm	0.0065 m
7 mm	0.007 m
7.5 mm	0.0075 m
8 mm	0.008 m
8.5 mm	0.0085 m
9 mm	0.009 m
9.5 mm	0.0095 m
10 mm	0.01 m
11 mm	0.011 m
12 mm	0.012 m
13 mm	0.013 m
14 mm	0.014 m
15 mm	0.015 m
16 mm	0.016 m
17 mm	0.017 m
18 mm	0.018 m
19 mm	0.019 m
20 mm	0.02 m
25 mm	0.025 m
30 mm	0.03 m
35 mm	0.035 m
40 mm	0.04 m
45 mm	0.045 m
50 mm	0.05 m
55 mm	0.055 m
60 mm	0.06 m
65 mm	0.065 m
70 mm	0.07 m
75 mm	0.075 m
80 mm	0.08 m
85 mm	0.085 m
90 mm	0.09 m
95 mm	0.095 m
100 mm	0.1 m
120 mm	0.12 m
125 mm	0.125 m
130 mm	0.13 m
140 mm	0.14 m
150 mm	0.15 m
160 mm	0.16 m
175 mm	0.175 m
180 mm	0.18 m
200 mm	0.2 m
225 mm	0.225 m
250 mm	0.25 m
275 mm	0.275 m
300 mm	0.3 m
350 mm	0.35 m
400 mm	0.4 m
450 mm	0.45 m
500 mm	0.5 m
600 mm	0.6 m
700 mm	0.7 m
750 mm	0.75 m
800 mm	0.8 m
900 mm	0.9 m
1000 mm	1 m
1200 mm	1.2 m
1250 mm	1.25 m
1500 mm	1.5 m
1750 mm	1.75 m
2000 mm	2 m
2500 mm	2.5 m
3000 mm	3 m
4000 mm	4 m
4500 mm	4.5 m
5000 mm	5 m
6000 mm	6 m
7000 mm	7 m
7500 mm	7.5 m
8000 mm	8 m
9000 mm	9 m
10000 mm	10 m
15000 mm	15 m
20000 mm	20 m
25000 mm	25 m
50000 mm	50 m
75000 mm	75 m
100000 mm	100 m

Values based on NIST SP 811 conversion factors

Why Convert Millimeters to Meters?

Converting between millimeters (mm) and meters (m) is one of the most common length conversions. Whether for engineering, cooking, travel, or science, knowing how to quickly convert mm to m saves time and prevents errors.

Length conversions between mm and m are fundamental in construction, manufacturing, and international trade. Architects rely on precise conversions when adapting building plans between metric and imperial standards — a 1% error on a 30-meter wall translates to 30 cm of misalignment. Travelers frequently convert between kilometers and miles for road trips, while online shoppers need length conversions to verify clothing sizes, furniture dimensions, and screen diagonals across international retailers. In athletics, track distances (100m, 1500m, marathon) must be precisely converted for record comparisons across different measurement traditions.

How to Convert Millimeters to Meters

To convert millimeters to meters, use the following formula:

m = mm × 0.001

Example: 1 mm = 0.001 m

For example, 5 mm = 0.005 m, 10 mm = 0.01 m, and 100 mm = 0.1 m. For larger values, 1000 mm = 1 m. Conversely, 1 m = 1000 mm. Our calculator above performs this conversion instantly with full precision — no rounding errors.

Common Mistakes to Avoid

Confusing similar units: confusing nautical miles with regular miles, or yards with meters.
Decimal errors: moving the decimal point the wrong way (e.g., 100 cm = 1 m, not 10 m).
Approximation: assuming an inch is exactly 2.5 cm (it's 2.54 cm).

Pro Tips

Use 'approx' for mental math: 1 km is roughly 0.6 miles (or 2/3 for quick estimates).
Visualize: A meter is about a guitar length; an inch is a thumb width.
Ruler check: Most rulers show cm and inches together—great for quick checks.

What is a Millimeter?

The millimeter (mm) is a metric unit of length equal to one-thousandth of a meter (0.001 m). It is a standard unit in the International System of Units (SI).

Millimeters are used for precision engineering, manufacturing dimensions, rainfall measurement, and paper sizes (ISO 216). It represents small scale accuracy.

What is a Meter?

The meter (m) is the base unit of length in the International System of Units (SI). Originally defined in 1793 as one ten-millionth of the distance from the equator to the North Pole, its definition has evolved with precision. Since 1983, it is defined as the distance light travels in a vacuum in 1/299,792,458 of a second.

Meters are the global standard for measuring length in science, engineering, construction, and daily life. It is the primary unit of length in almost every country worldwide, with the notable exceptions of the United States, Liberia, and Myanmar.

Millimeters → Meters

Millimeters to Meters Formula