The Chain (Gunter's chain) was fundamental in surveying the American frontier. Measuring 66 feet (4 rods), it's the length of a cricket pitch. Ten square chains make an acre. Modern surveyors still reference chains in legal descriptions, and the unit remains visible in rural road layouts across the US. The Millimeter (mm) is perfect for very small measurements like the thickness of a credit card (0.76 mm), the diameter of a pencil lead (0.5-0.7 mm), or the size of small hardware components. Commonly used in engineering, jewelry design and manufacturing.
To convert between Chain (ch) and Millimeter (mm), use the following formulas:
1 Chain (ch) = 20116.8 Millimeter (mm)
1 Millimeter (mm) = 0.000049709695378986714 Chain (ch)
1 ch = 1 * 20116.8 mm = 20116.8 mm
5 ch = 5 * 20116.8 mm = 100584 mm
10 ch = 10 * 20116.8 mm = 201168 mm
20 ch = 20 * 20116.8 mm = 402336 mm
50 ch = 50 * 20116.8 mm = 1005840 mm
100 ch = 100 * 20116.8 mm = 2011680 mm
| Chain (ch) | Millimeter (mm) |
|---|---|
| 1 ch | 20116.8 mm |
| 5 ch | 100584 mm |
| 10 ch | 201168 mm |
| 20 ch | 402336 mm |
| 50 ch | 1005840 mm |
| 100 ch | 2011680 mm |