How many millimeters are in 1 meter?

1 m equals 1000 mm. This is an exact conversion factor defined by NIST.

How do I convert meters to millimeters?

Multiply the value in m by the conversion factor. For example, 10 m = 10000 mm. Use our calculator above for instant results.

Is the meters to millimeters conversion exact?

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

Can I convert meters to millimeters 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 meters and millimeters?

Meters (m) and Millimeters (mm) are both units of length but belong to different measurement systems. 1 m = 1000 mm. Use the converter above to switch between them instantly.

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

m → mm Reference Table

m	mm
0.001 m	1 mm
0.002 m	2 mm
0.003 m	3 mm
0.004 m	4 mm
0.005 m	5 mm
0.006 m	6 mm
0.007 m	7 mm
0.008 m	8 mm
0.009 m	9 mm
0.01 m	10 mm
0.02 m	20 mm
0.03 m	30 mm
0.04 m	40 mm
0.05 m	50 mm
0.06 m	60 mm
0.07 m	70 mm
0.08 m	80 mm
0.09 m	90 mm
0.1 m	100 mm
0.2 m	200 mm
0.3 m	300 mm
0.4 m	400 mm
0.5 m	500 mm
0.6 m	600 mm
0.7 m	700 mm
0.8 m	800 mm
0.9 m	900 mm
1 m	1000 mm
1.5 m	1500 mm
2 m	2000 mm
2.5 m	2500 mm
3 m	3000 mm
3.5 m	3500 mm
4 m	4000 mm
4.5 m	4500 mm
5 m	5000 mm
5.5 m	5500 mm
6 m	6000 mm
6.5 m	6500 mm
7 m	7000 mm
7.5 m	7500 mm
8 m	8000 mm
8.5 m	8500 mm
9 m	9000 mm
9.5 m	9500 mm
10 m	10000 mm
11 m	11000 mm
12 m	12000 mm
13 m	13000 mm
14 m	14000 mm
15 m	15000 mm
16 m	16000 mm
17 m	17000 mm
18 m	18000 mm
19 m	19000 mm
20 m	20000 mm
25 m	25000 mm
30 m	30000 mm
35 m	35000 mm
40 m	40000 mm
45 m	45000 mm
50 m	50000 mm
55 m	55000 mm
60 m	60000 mm
65 m	65000 mm
70 m	70000 mm
75 m	75000 mm
80 m	80000 mm
85 m	85000 mm
90 m	90000 mm
95 m	95000 mm
100 m	100000 mm
120 m	120000 mm
125 m	125000 mm
130 m	130000 mm
140 m	140000 mm
150 m	150000 mm
160 m	160000 mm
175 m	175000 mm
180 m	180000 mm
200 m	200000 mm
225 m	225000 mm
250 m	250000 mm
275 m	275000 mm
300 m	300000 mm
350 m	350000 mm
400 m	400000 mm
450 m	450000 mm
500 m	500000 mm
600 m	600000 mm
700 m	700000 mm
750 m	750000 mm
800 m	800000 mm
900 m	900000 mm
1000 m	1000000 mm
1200 m	1200000 mm
1250 m	1250000 mm
1500 m	1500000 mm
1750 m	1750000 mm
2000 m	2000000 mm
2500 m	2500000 mm
3000 m	3000000 mm
4000 m	4000000 mm
4500 m	4500000 mm
5000 m	5000000 mm
6000 m	6000000 mm
7000 m	7000000 mm
7500 m	7500000 mm
8000 m	8000000 mm
9000 m	9000000 mm
10000 m	10000000 mm
15000 m	15000000 mm
20000 m	20000000 mm
25000 m	25000000 mm
50000 m	50000000 mm
75000 m	75000000 mm
100000 m	100000000 mm

Values based on NIST SP 811 conversion factors

Why Convert Meters to Millimeters?

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

Length conversions between m and mm 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 Meters to Millimeters

To convert meters to millimeters, use the following formula:

mm = m × 1000

Example: 1 m = 1000 mm

For example, 5 m = 5000 mm, 10 m = 10000 mm, and 100 m = 100000 mm. For larger values, 1000 m = 1000000 mm. Conversely, 1 mm = 0.001 m. 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 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.

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.

Meters → Millimeters

Meters to Millimeters Formula