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Meter to Millimeter Converter

Instant, two-way conversion across common engineering units.

Free

1 m = 1,000 mm(Metre → Millimetre)

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Converting meters to millimeters

To convert meters to millimeters, multiply the value by 1,000. Length values feed directly into setting out, spans and drawing dimensions, so the converter keeps full decimal precision in both directions.

Visual scale

To scale
1 meter = 1,000 millimeters.= 1K millimeters
1 millimeter = 0.001 meters.

Meter (m)

The meter (m) is the SI base unit of length and the international standard used worldwide.

Origin
Originally defined as one ten-millionth of the distance from the equator to the North Pole, it is now defined by the distance light travels in vacuum in 1/299,792,458 of a second.
Where it is used
Used for building grids, floor levels, spans, site dimensions and virtually all scientific and engineering work.
Relation to SI
The meter is the SI base unit; every other length unit here is defined from it.

Millimeter (mm)

The millimeter (mm) is one thousandth of a meter and the working unit of technical drawing in most of the world.

Origin
A decimal subdivision of the meter, introduced with the metric system and retained unchanged in SI.
Where it is used
The default dimension unit on architectural and structural drawings, shop drawings, joinery details and product data sheets.
Relation to SI
1 mm = 0.001 m exactly.

Frequently asked questions

How many millimeters are in one meter?

1 m equals 1,000 mm.

How do I convert meters to millimeters?

Multiply the value by 1,000. For example, 10 m equals 10,000 mm.

How do I convert back from millimeters to meters?

1 mm equals 0.001 m. The converter above works in both directions, so you can type into either field.

Should I work in millimeters or meters on drawings?

Most architectural and structural drawings outside the US are dimensioned in millimeters to avoid decimal points, while site levels, grids and areas are stated in meters.

Are the imperial values here exact?

Yes. The inch has been defined as exactly 25.4 mm since 1959, so foot, yard and mile conversions are exact rather than rounded.

Is this length converter free to use?

Yes. Every unit conversion runs in your browser, needs no account and is free for professional use.

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