The decameter (dam) is used to measure medium-scale distances like the length of a tennis court (~2.3 dam) or a cricket pitch (~2.0 dam). It’s also practical for land surveying and agricultural plots (e.g., a small field might be 10 dam × 20 dam). 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 Decameter (dam) and Chain (ch), use the following formulas:
1 Decameter (dam) = 0.4970969537898671 Chain (ch)
1 Chain (ch) = 2.01168 Decameter (dam)
1 dam = 1 * 0.4970969537898671 ch = 0.4970969537898671 ch
2 dam = 2 * 0.4970969537898671 ch = 0.9941939075797342 ch
5 dam = 5 * 0.4970969537898671 ch = 2.485484768949336 ch
10 dam = 10 * 0.4970969537898671 ch = 4.970969537898672 ch
20 dam = 20 * 0.4970969537898671 ch = 9.941939075797343 ch
| Decameter (dam) | Chain (ch) |
|---|---|
| 1 dam | 0.4970969537898671 ch |
| 5 dam | 2.485484768949336 ch |
| 10 dam | 4.970969537898672 ch |
| 20 dam | 9.941939075797343 ch |
| 50 dam | 24.854847689493358 ch |
| 100 dam | 49.709695378986716 ch |