Convert Millimeters to Meters
1 millimeter is 0.001 m. One millimeter is exactly 0.001 meters.
One millimeter is 0.001 meters. To convert millimeters to meters, multiply by 0.001; to go the other way, divide by 0.001 or multiply by 1000. The factor is exact rather than rounded: it follows from NIST. One thousandth of a meter.
Factor checked against the defining standard · How we check
- Millimeters × 0.001
1 * 0.0010.001 m
1 millimeter in every length unit
| Unit | Value | Exact factor |
|---|---|---|
| inches | 0.03937007874 in | × 0.0393700787402 |
| feet | 0.003280839895 ft | × 0.00328083989501 |
| yards | 0.001093613298 yd | × 0.00109361329834 |
| miles | 0.0000006213711922 mi | × 0.000000621371192237 |
| millimeters (as entered) | 1 mm | — |
| decimetres | 0.01 dm | × 0.01 |
| centimeters | 0.1 cm | × 0.1 |
| meters | 0.001 m | × 0.001 |
| kilometers | 0.000001 km | × 0.000001 |
| nautical miles | 0.0000005399568035 nmi | × 0.000000539956803456 |
| micrometers | 1,000 µm | × 1,000 |
| nanometers | 1,000,000 nm | × 1,000,000 |
| thou | 39.37007874 thou | × 39.3700787402 |
Factors are entered by hand from NIST rather than derived from a units library, so the ones that terminate are exact rather than rounded.
The same converter answers this pair however it is written: millimetres to metres is the British spelling of the same units — the metre and the litre are spelled that way outside the United States and the quantity does not change.
How do you convert millimeters to meters? The converter and the working
- 1.Take the measurement in millimeters.
- 2.Multiply by 0.001 — that is how many meters fit in one millimeter.
- 3.To go back the other way, divide by 0.001, or multiply by 1000.
Worked example: 25 millimeters to meters
- Formula
- mm × 0.001 = m
- Arithmetic
- 25 × 0.001 = 0.03 m
- Answer
- 25 mm = 0.03 m
The factor is exact, so this figure is exact too — only the display is rounded.
Millimeters to meters conversion table
| Millimeters | Meters |
|---|---|
| 1 mm | 0.001 m |
| 2 mm | 0.002 m |
| 3 mm | 0.003 m |
| 4 mm | 0.004 m |
| 5 mm | 0.01 m |
| 6 mm | 0.01 m |
| 7 mm | 0.01 m |
| 8 mm | 0.01 m |
| 9 mm | 0.01 m |
| 10 mm | 0.01 m |
| 12 mm | 0.01 m |
| 15 mm | 0.02 m |
| 20 mm | 0.02 m |
| 25 mm | 0.03 m |
| 50 mm | 0.05 m |
| 100 mm | 0.1 m |
| 200 mm | 0.2 m |
| 300 mm | 0.3 m |
| 500 mm | 0.5 m |
| 1000 mm | 1 m |
| 2000 mm | 2 m |
| 5000 mm | 5 m |
| 10000 mm | 10 m |
What is a millimeter?
One thousandth of a meter. The working unit of metric engineering drawings, which avoid decimals by using it throughout.
What is a meter?
The SI base unit, defined since 1983 by the distance light travels in 1/299,792,458 of a second.
How many meters are in a millimeter?
One millimeter is 0.001 meters, exactly. Going the other way, one meter is 1000 millimeters. Both figures come from the same defined relation rather than from a measurement, which is why they are the same today as they were in 1959.
Every length unit here
The whole group — 13 units with their symbols and the size of each one in meters — is on the conversion index, along with every pair it makes. The table above already gives each of them relative to a millimeter.
Source: NIST — international yard and pound agreement (inch = 25.4 mm exactly)
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- Chicago
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Questions people actually ask
- How many meters are in a millimeter?
- 0.001. The SI base unit, defined since 1983 by the distance light travels in 1/299,792,458 of a second.
- How do I convert meters back to millimeters?
- Divide by 0.001, or multiply by 1000 — they are the same operation.
Other length conversions
Meters to millimeters — the same conversion the other way.