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 Fathom remains vital in maritime navigation, measuring water depth and anchor chains. One fathom equals 6 feet. For reference, recreational scuba divers typically explore depths of 10-20 fathoms (60-120 feet), while the Titanic rests at about 1,200 fathoms (7,200 feet) below sea level.
To convert between Chain (ch) and Fathom (ftm), use the following formulas:
1 Chain (ch) = 11 Fathom (ftm)
1 Fathom (ftm) = 0.0909090909090909 Chain (ch)
1 ch = 1 * 11 ftm = 11 ftm
5 ch = 5 * 11 ftm = 55 ftm
10 ch = 10 * 11 ftm = 110 ftm
20 ch = 20 * 11 ftm = 220 ftm
50 ch = 50 * 11 ftm = 550 ftm
100 ch = 100 * 11 ftm = 1100 ftm
| Chain (ch) | Fathom (ftm) |
|---|---|
| 1 ch | 11 ftm |
| 5 ch | 55 ftm |
| 10 ch | 110 ftm |
| 20 ch | 220 ftm |
| 50 ch | 550 ftm |
| 100 ch | 1100 ftm |