This page provides conversion factors and formulas for conversion of length expressed in millimeters to other units - centimeter, decimeter, meter, kilometer, inch, foot, yard, mile, nautical mile, and more...
How to convert units:
In order to covert a measurement in millimeters to one of the units listed in the table below, simply multiply the length
value in millimeters by the conversion factor value listed in the corresponding row. Alternatively, use the formula provided
in the rightmost column.
In a situation where a direct conversion factor is not available, the following general unit conversion approach can be used.
Let's say, we have a value Lu1 expressed in one unit and would like to convert it to another unit -
Lu2. We also know the basic correlation between the units: Bu1 is equal to Bu2.
Then Lu2 can be calculated as:
Lu2 = Lu1 × Bu2 ÷ Bu1
For example:
We have Lmm = 500 mm and would like to find an equivalent in feet - Lft.
The correlation between the units is: 1 foot is equal to 304.8 millimeters, which means: Bmm = 304.8 mm and
Bft = 1 ft
Using the formula listed above, we can find the length in feet:
Lft = 500 mm × 1 ft ÷ 304.8 mm = 1.64041995 ft (approximately)
Millimeter conversion factors and formulas:
| To convert millimeter to: | Multiply by*: | Formula: |
|---|---|---|
| centimeter (cm) | 0.1 | Lcm = Lmm × 0.1 |
| decimeter (dm) | 0.01 | Ldm = Lmm × 0.01 |
| foot (ft) | 0.00328083989501312 | Lft = Lmm ÷ 304.8 |
| inch (in) | 0.0393700787401575 | Lin = Lmm ÷ 25.4 |
| kilometer (km) | 10-6 | Lkm = Lmm × 10-6 |
| meter (m) | 0.001 | Lm = Lmm × 0.001 |
| micrometer (µm) | 1000 | Lµm = Lmm × 1000 |
| micron | 1000 | Lµm = Lmm × 1000 |
| mil | 39.3700787401575 | Lmil = Lmm ÷ 0.0254 |
| mile (mi) | 6.21371192237333×10-7 | Lmi = Lmm ÷ 1609344 |
| nanometer (nm) | 106 | Lnm = Lmm × 106 |
| nautical mile (NM) | 5.39956803455723×10-7 | Lnmi = Lmm ÷ 1852000 |
| thou | 39.3700787401575 | Lthou = Lmm ÷ 0.0254 |
| yard (yd) | 0.00109361329833771 | Lyd = Lmm ÷ 914.4 |
*Note: Conversion factors shown in bold are exact conversion values.
See also:
Inch Fraction Conversion Table
Inch Conversion Table
Foot Conversion Table
Yard Conversion Table
Mile Conversion Table
Centimeter Conversion Table
Meter Conversion Table
Kilometer Conversion Table
Nautical Mile Conversion Table
Length Unit Converter
Area Unit Converter
Unit Converters and Calculators - extended list