Convert Millimeter to Link
Convert millimeters to links instantly. 1 millimeter = 0.0049709695 link — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Link to Millimeter converter for the reverse conversion.
Units explained
Millimeter
A millimeter is a metric unit of length equal to one thousandth of a meter (1/1000 m). It is the standard small-scale unit in the SI system and is widely used wherever sub-centimeter precision matters.
The millimeter was defined alongside the meter when France adopted the metric system in 1795, using the standard SI prefix milli- (from Latin mille, "thousand") to denote one-thousandth.
Millimeters are used in engineering drawings, machining, manufacturing, paper sizes, rainfall measurement, and any context where dimensions below one centimeter need to be specified clearly. Most rulers worldwide are marked in millimeters.
Adopted in 1795 in France as part of the original metric system; standardized internationally by the Metre Convention in 1875 and confirmed in the SI in 1960.
Link
A link is an Imperial unit of length equal to 7.92 inches (201.168 mm) — exactly 1/100 of a surveyor's chain. It is the smallest unit in the chain-based survey measurement system.
The link was defined by Edmund Gunter in 1620 as part of his 22-yard surveying chain. He divided the chain into 100 links specifically to enable easy decimal arithmetic when computing parcel areas.
Links appear in historical US and UK land survey documents (especially pre-1900). Modern surveyors generally use feet or meters but legacy deed records and government land surveys still cite acreage in chains and links.
Defined by Edmund Gunter in 1620; standardised as 7.92 inches via the chain definition; became exact via the 1959 International Yard and Pound Agreement.
Millimeter to Link conversion formula
The relationship between millimeters and links:
To convert millimeters to links, multiply the value in millimeters by 0.0049709695. To reverse, multiply links by 201.168.
How to use this converter
Type a value into the calculator. The result in links updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Link to Millimeter converter for the reverse direction.
Step-by-step: convert millimeters to links
- Write down the value in millimeters (mm).
- Multiply that value by the factor 0.0049709695.
- The product is the equivalent value in links (lk).
- To reverse, multiply the link value by 201.168.
Worked examples
Example 1 — Convert 1 mm to lk:
1 × 0.0049709695 = 0.0049709695 lk
Example 2 — Convert 100 mm to lk:
100 × 0.0049709695 = 0.4970969538 lk
Real-world example — Furniture and large objects
A 72-millimeter piece of furniture converts to a value in links that's easier to mentally compare with room dimensions. This is the typical workflow when shopping internationally and product specs use a different unit than your room measurements.
72 mm × 0.0049709695 = 0.3579098067 lk
Real-world example — Children's height milestones
A 150-millimeter-tall child measures a value in links that's commonly used for theme-park ride height requirements when travelling between countries that use different measurement units.
150 mm × 0.0049709695 = 0.7456454307 lk
Real-world example — Body height conversion
You enter your height as 180 millimeters into an international job or visa application. The form then asks for the same value in links — converting between these adjacent units is one of the most-used length conversions globally.
180 mm × 0.0049709695 = 0.8947745168 lk
Millimeter to Link conversion table
Standard reference values for converting millimeters to links:
| Millimeter [mm] | Link [lk] |
|---|---|
| 0.01 | 4.97097e-5 |
| 0.1 | 0.000497097 |
| 1 | 0.0049709695 |
| 2 | 0.0099419391 |
| 3 | 0.0149129086 |
| 4 | 0.0198838782 |
| 5 | 0.0248548477 |
| 10 | 0.0497096954 |
| 20 | 0.0994193908 |
| 30 | 0.1491290861 |
| 40 | 0.1988387815 |
| 50 | 0.2485484769 |
| 100 | 0.4970969538 |
| 500 | 2.4854847689 |
| 1000 | 4.9709695379 |
Frequently asked questions
How many links is 1 millimeter?
How do I convert millimeters to links?
How do I convert links back to millimeters?
How many links is 100 millimeters?
Popular length unit conversions
Convert Millimeter to other length units
Show all Millimeter conversions
Metric / SI (17 units)
Imperial / US Customary (27 units)
Nautical (1 units)
Astronomical (9 units)
Atomic / Physics (6 units)
Typographic (3 units)
Sources & references
Conversion factor (1 mm = 0.0049709695 lk) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.