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 Thou (also called Mil) is essential in precision engineering and manufacturing. For context, a standard sheet of paper is about 100 thou thick, while human hair measures approximately 20-30 thou in diameter. This unit is critical in machining tolerances, PCB design, and automotive engineering where exact measurements are crucial.
To convert between Chain (ch) and Thou (Mil) (mil), use the following formulas:
1 Chain (ch) = 792000 Thou (Mil) (mil)
1 Thou (Mil) (mil) = 0.0000012626262626262627 Chain (ch)
1 ch = 1 * 792000 mil = 792000 mil
5 ch = 5 * 792000 mil = 3960000 mil
10 ch = 10 * 792000 mil = 7920000 mil
20 ch = 20 * 792000 mil = 15840000 mil
50 ch = 50 * 792000 mil = 39600000 mil
100 ch = 100 * 792000 mil = 79200000 mil
| Chain (ch) | Thou (Mil) (mil) |
|---|---|
| 1 ch | 792000 mil |
| 5 ch | 3960000 mil |
| 10 ch | 7920000 mil |
| 20 ch | 15840000 mil |
| 50 ch | 39600000 mil |
| 100 ch | 79200000 mil |