The US survey foot is 1200/3937 meters and is retained for legacy land records.
US survey feet to Chains Converter — ftUS to ch
Convert US survey foot (ftUS) to Chain (ch) using the exact conversion factor (1 us survey foot = 0.0151515455 chain). See the formula, worked examples, and conversion table.
US survey feet to Chains converter
Converter
Length Converter
Convert SI, imperial, US customary, astronomical, scientific, and historical length units.
Context values
Some unit families need one extra value for a physically accurate result.
A surveyor's chain is 66 feet.
Result = input x 0.3048006096 / 20.1168.
Length uses the meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting US survey feet to Chains
US survey foot and Chain both measure length. Specifically: The US survey foot is 1200/3937 meters and is retained for legacy land records, and a surveyor's chain is 66 feet.
Formula
chains = us survey feet × 0.0151515454546
This factor comes from each unit's defined relationship to the category's base unit: 1 us survey foot equals 0.304800609601 base units, and 1 chain equals 20.1168 base units, so dividing one by the other gives the direct us survey foot-to-chain factor of 0.0151515454546.
Simple example
1 ftUS × 0.01515154545 = 0.0151515455 ch
1 us survey foot = 0.0151515455 chains.
Real-world example
10 ftUS × 0.01515154545 = 0.1515154545 ch
10 us survey feet = 0.1515154545 chains.
Conversion table
| US survey foot (ftUS) | Chain (ch) |
|---|---|
| 1 ftUS | 0.0151515455 ch |
| 5 ftUS | 0.0757577273 ch |
| 10 ftUS | 0.1515154545 ch |
| 21.0975 ftUS | 0.3196597302 ch |
| 42.195 ftUS | 0.6393194605 ch |
| 100 ftUS | 1.515154545 ch |
Reverse conversion: Chain to US survey foot
0.0151515455 ch × 65.999868 = 1.000000003 ftUS
0.0151515455 chains = 1.000000003 us survey feet.
us survey feet = chains × 65.999868
For a page dedicated to this direction, see Chain to US survey foot.
Understanding the US survey foot (ftUS)
The US survey foot is 1200/3937 meters and is retained for legacy land records.
Understanding the Chain (ch)
A surveyor's chain is 66 feet.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many chains are in 1 us survey foot?
1 us survey foot equals 0.0151515455 chains, using the exact defined conversion factor rather than an estimate.
How do I convert us survey foot to chain?
Multiply the us survey foot value by 0.01515154545. The converter above does this instantly to whatever precision you set.
How do I convert chain back to us survey foot?
Use the reverse factor: 1 chain equals 65.999868 us survey feet. You can also use the swap control in the converter above to flip the direction instantly.
What is a us survey foot?
US survey foot (ftUS) is a unit of length.
What is a chain?
Chain (ch) is a unit of length.
Is the us survey foot to chain conversion exact?
Yes. Both us survey foot and chain are defined by fixed standards rather than physical artifacts, so the factor of 0.01515154545 used above is exact to as many digits as you choose to display.