To convert chains to US survey chains, multiply the value by 0.999998. To go the other way, multiply US survey chains by 1 to get chains.
| Chains (ch) | US Survey Chains (chUS) |
|---|---|
| 1 ch | 0.999998 chUS |
| 2 ch | 2 chUS |
| 3 ch | 2.99999 chUS |
| 4 ch | 3.99999 chUS |
| 5 ch | 4.99999 chUS |
| 6 ch | 5.99999 chUS |
| 7 ch | 6.99999 chUS |
| 8 ch | 7.99998 chUS |
| 9 ch | 8.99998 chUS |
| 10 ch | 9.99998 chUS |
| 12 ch | 12 chUS |
| 14 ch | 14 chUS |
| 15 ch | 15 chUS |
| 20 ch | 20 chUS |
| 21 ch | 21 chUS |
| 24 ch | 24 chUS |
| 25 ch | 25 chUS |
| 30 ch | 29.9999 chUS |
| 40 ch | 39.9999 chUS |
| 50 ch | 49.9999 chUS |
| 60 ch | 59.9999 chUS |
| 75 ch | 74.9999 chUS |
| 80 ch | 79.9998 chUS |
| 100 ch | 99.9998 chUS |
| 200 ch | 200 chUS |
| 250 ch | 250 chUS |
| 300 ch | 299.999 chUS |
| 400 ch | 399.999 chUS |
| 500 ch | 499.999 chUS |
| 750 ch | 749.999 chUS |
| 1,000 ch | 999.998 chUS |
Chain (ch). A chain is 66 feet (20.1168 m), a surveying unit; 80 chains make one mile.
US survey chain (chUS). The US survey chain is 66 US survey feet, about 20.1168 m.
There are 0.999998 US survey chains in one chain.
Multiply the number of chains by 0.999998. For example, 10 chains equal 9.99998 US survey chains.
One US survey chain equals 1 chain.
12 US survey chains. Other common values: 5 chains = 4.99999 US survey chains and 100 chains = 99.9998 US survey chains.