Millimeter is 0.001 meter units.
Millimeters to Links Converter — mm to li
Convert Millimeter (mm) to Link (li) using the exact conversion factor (1 millimeter = 0.0049709695 link). See the formula, worked examples, conversion table, history, and common uses.
Millimeters to Links converter
Converter
Length Converter
Convert SI, imperial, US customary, astronomical, scientific, and historical length units.
Context values
Some unit families need one extra value for a physically accurate result.
A surveyor's link is 1/100 of a chain.
Result = input x 0.001 / 0.201168.
Length uses the meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Millimeters to Links
Millimeter and Link both measure length. Millimeter is most often used for engineering drawings and manufacturing tolerances worldwide (including in the us).
Formula
links = millimeters × 0.0049709695379
This factor comes from each unit's defined relationship to the category's base unit: 1 millimeter equals 0.001 base units, and 1 link equals 0.201168 base units, so dividing one by the other gives the direct millimeter-to-link factor of 0.0049709695379.
Simple example
1 mm × 0.004970969538 = 0.0049709695 li
1 millimeter = 0.0049709695 links.
Real-world example
10 mm × 0.004970969538 = 0.0497096954 li
10 millimeters = 0.0497096954 links.
Conversion table
| Millimeter (mm) | Link (li) |
|---|---|
| 1 mm | 0.0049709695 li |
| 5 mm | 0.0248548477 li |
| 10 mm | 0.0497096954 li |
| 21.0975 mm | 0.1048750298 li |
| 42.195 mm | 0.2097500597 li |
| 100 mm | 0.4970969538 li |
Reverse conversion: Link to Millimeter
0.0049709695 li × 201.168 = 0.9999999924 mm
0.0049709695 links = 0.9999999924 millimeters.
millimeters = links × 201.168
For a page dedicated to this direction, see Link to Millimeter.
Understanding the Millimeter
Millimeter (mm) measures distance. A millimeter is one-thousandth of a meter. It is classified as a SI derived (metric prefix) unit.
Where it's used: Standard small/precision length unit worldwide, including in US engineering and manufacturing
Uses of the Millimeter today
- Engineering drawings and manufacturing tolerances worldwide (including in the US)
- Rainfall measurement in most countries
- Small-scale everyday measurement (screen sizes, hardware)
History of the Millimeter
The millimeter follows from the meter via the 'milli-' SI prefix (10⁻³). It is notable as one of the few metric units in routine US technical/engineering use, since precision manufacturing and electronics are often specified in millimeters even in the US.
Historical origin. Millimeter was not the invention of a single named person; it developed through the process described above.
Understanding the Link (li)
A surveyor's link is 1/100 of a chain.
Millimeter — sources
- BIPM SI Brochure — SI prefixes — Defines 'milli-' as the prefix for 10⁻³.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many links are in 1 millimeter?
1 millimeter equals 0.0049709695 links, using the exact defined conversion factor rather than an estimate.
How do I convert millimeter to link?
Multiply the millimeter value by 0.004970969538. The converter above does this instantly to whatever precision you set.
How do I convert link back to millimeter?
Use the reverse factor: 1 link equals 201.168 millimeters. You can also use the swap control in the converter above to flip the direction instantly.
What is a millimeter?
Millimeter (mm) measures distance. A millimeter is one-thousandth of a meter. It is classified as a SI derived (metric prefix) unit.
What is a link?
Link (li) is a unit of length.
Is the millimeter to link conversion exact?
Yes. Both millimeter and link are defined by fixed standards rather than physical artifacts, so the factor of 0.004970969538 used above is exact to as many digits as you choose to display.
Where is the millimeter still used today?
Standard small/precision length unit worldwide, including in US engineering and manufacturing