Millimeter to Chain Converter
Convert Millimeter (mm) to Chain (ch) instantly. 1 mm = 4.970970e-5 ch.
Length Converter
31 units available
1 mm = 4.970970e-5 ch
Formula:
ch = mm × 0.0000497097With your value: 1 mm = 4.970970e-5 ch
How big is that?
Everyday references on a logarithmic scale, all expressed in millimeter so you can sanity-check the result.
Other Millimeter to Chain conversions
Millimeter to Chain Conversion Table
| Millimeter (mm) | Chain (ch) |
|---|---|
| 0.5 | 2.485485e-5 |
| 1 | 4.970970e-5 |
| 2 | 9.941939e-5 |
| 5 | 0.000249 |
| 10 | 0.000497 |
| 15 | 0.000746 |
| 20 | 0.000994 |
| 25 | 0.001243 |
| 50 | 0.002485 |
| 100 | 0.004971 |
| 250 | 0.012427 |
| 500 | 0.024855 |
| 1000 | 0.04971 |
Chain to Millimeter Conversion Table
| Chain (ch) | Millimeter (mm) |
|---|---|
| 0.5 | 10,058.4 |
| 1 | 20,116.8 |
| 2 | 40,233.6 |
| 5 | 100,584 |
| 10 | 201,168 |
| 15 | 301,752 |
| 20 | 402,336 |
| 25 | 502,920 |
| 50 | 1,005,840 |
| 100 | 2,011,680 |
| 250 | 5,029,200 |
| 500 | 10,058,400 |
| 1000 | 20,116,800 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Millimeter (mm)
Length
Traceable to the metre, defined by fixing the speed of light in vacuum at 299 792 458 m/s. Imperial lengths derive from the 1959 international yard (0.9144 m exactly).
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
Chain (ch)
Length
Traceable to the metre, defined by fixing the speed of light in vacuum at 299 792 458 m/s. Imperial lengths derive from the 1959 international yard (0.9144 m exactly).
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
How to Convert Millimeter to Chain
To convert from Millimeter (mm) to Chain (ch), multiply the value by 4.970970e-5.
Formula: ch = mm × 0.0000497097
Reverse: mm = ch × 20,116.8
Step-by-Step Example
- Start with your value in Millimeter. For example: 5 mm
- Multiply by the conversion factor: 5 x 4.970970e-5
- The result is: 0.000249 ch
About Millimeter
The millimeter equals one thousandth of a meter and is used for precise measurements in engineering and manufacturing.
Common uses: engineering, rainfall measurement, manufacturing.
About Chain
Gunter's chain equals 66 feet (20.1168 m) and underpins the US Public Land Survey System: 10 square chains make one acre.
Common uses: land surveying, cadastral records, cricket pitch length.
Frequently Asked Questions
How many Chain are in 1 Millimeter?
There are exactly 4.970970e-5 Chain in 1 Millimeter. This means the conversion factor from Millimeter to Chain is 4.970970e-5.
What is the formula to convert Millimeter to Chain?
The formula to convert Millimeter to Chain is: ch = mm × 0.0000497097. For example, to convert 10 Millimeter to Chain, you would multiply 10 by 4.970970e-5.
What is a Millimeter?
The millimeter equals one thousandth of a meter and is used for precise measurements in engineering and manufacturing.
What is a Chain?
Gunter's chain equals 66 feet (20.1168 m) and underpins the US Public Land Survey System: 10 square chains make one acre.
What are the common uses of Millimeter?
The Millimeter is commonly used in engineering, rainfall measurement, manufacturing.
Related Length Conversions
Cite this page
UnitConvertLab. (2026). Millimeter to Chain converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/millimeter-to-chain