Millimeter to Chain Converter
Length · unit-converter
Convert Millimeter to Chain with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations use SI-based definitions (international yard, nautical mile, etc.).
Calculator
From: Millimeter (mm)
To: Chain (chain)
About Millimeter
The millimeter is a metric unit equal to one thousandth of a meter (0.001 m). It is used for precision engineering, 3D printing, and small tolerances.
About Chain
The chain is a surveying unit equal to 66 feet (20.1168 meters) exactly. It appears in land measurement and legacy civil engineering records.
How to convert millimeters to chains
1 millimeter is equal to 0.00004970969538 chain:
1 mm = (0.001 m ÷ 20.1168 m) chain = 0.00004970969538 chain
Each millimeter is defined as 0.001 m and each chain as 20.1168 m, so one mm equals 0.001 ÷ 20.1168 chain = 0.00004970969538 chain.
Let d(mm) be the numeric value of the same length measured in Millimeter (mm), and d(chain) the value in Chain (chain). Then:
d(chain) = d(mm) × (0.001 / 20.1168)
Equivalently, divide by how many mm fit into one chain (meters per chain divided by meters per mm):
d(chain) = d(mm) ÷ 20116.79999999999927
Or: chain = millimeter ÷ 20116.79999999999927
Examples
Example #1: Convert 20 mm to chain
20 mm = 20 mm × (0.001/20.1168) chain = 0.0009941939 chain
20 mm = 20 mm ÷ 20116.79999999999927 = 0.0009941939 chain
Example #2: Convert 50 mm to chain
50 mm = 50 mm × (0.001/20.1168) chain = 0.0024854848 chain
50 mm = 50 mm ÷ 20116.79999999999927 = 0.0024854848 chain
Summary
To convert Millimeter to Chain, multiply the value in mm by the ratio of meters per mm divided by meters per chain. Equivalently: value_chain = value_mm × (0.001 / 20.1168). Numerically, 1 mm equals 0.000049709695378986714 chain.
Relationship context
You are converting between metric (SI) (Millimeters) and US customary / imperial (Chains). Metric units are decimal; imperial units use inches, feet, yards, and miles tied to the international yard definition. Nautical miles are defined in meters (1 nmi = 1,852 m). This tool uses SI-based factors so results stay consistent with modern standards.
Conversion tables
| Millimeter (mm) | Chain (chain) |
|---|---|
| 0.1 | 0.000004971 |
| 1 | 0.0000497097 |
| 2 | 0.0000994194 |
| 3 | 0.0001491291 |
| 4 | 0.0001988388 |
| 5 | 0.0002485485 |
| 6 | 0.0002982582 |
| 7 | 0.0003479679 |
| 8 | 0.0003976776 |
| 9 | 0.0004473873 |
| Millimeter (mm) | Chain (chain) |
|---|---|
| 10 | 0.000497097 |
| 20 | 0.0009941939 |
| 30 | 0.0014912909 |
| 40 | 0.0019883878 |
| 50 | 0.0024854848 |
| 60 | 0.0029825817 |
| 70 | 0.0034796787 |
| 80 | 0.0039767756 |
| 90 | 0.0044738726 |
| 100 | 0.0049709695 |