The Mile (mi) is commonly used in the United States and the UK for road distances (e.g., 10 mi to the next town), marathon running (26.2 mi), and aviation. It's also used in athletics (e.g., 4-minute mile) and car speed limits (mph). 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.
To convert between Mile (mi) and Chain (ch), use the following formulas:
1 Mile (mi) = 80 Chain (ch)
1 Chain (ch) = 0.0125 Mile (mi)
0.5 mi = 0.5 * 80 ch = 40 ch
3 mi = 3 * 80 ch = 240 ch
10 mi = 10 * 80 ch = 800 ch
26.2 mi = 26.2 * 80 ch = 2096 ch
100 mi = 100 * 80 ch = 8000 ch
| Mile (mi) | Chain (ch) |
|---|---|
| 0.1 mi | 8 ch |
| 1 mi | 80 ch |
| 5 mi | 400 ch |
| 10 mi | 800 ch |
| 20 mi | 1600 ch |
| 50 mi | 4000 ch |
| 100 mi | 8000 ch |
| 200 mi | 16000 ch |
| 500 mi | 40000 ch |