A surveyor's chain is 66 feet.
Chains to US survey feet Converter — ch to ftUS
Convert Chain (ch) to US survey foot (ftUS) using the exact conversion factor (1 chain = 65.999868 us survey foot). See the formula, worked examples, and conversion table.
Chains to US survey feet 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.
The US survey foot is 1200/3937 meters and is retained for legacy land records.
Result = input x 20.1168 / 0.3048006096.
Length uses the meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Chains to US survey feet
Chain and US survey foot both measure length. Specifically: A surveyor's chain is 66 feet, and the US survey foot is 1200/3937 meters and is retained for legacy land records.
Formula
us survey feet = chains × 65.999868
This factor comes from each unit's defined relationship to the category's base unit: 1 chain equals 20.1168 base units, and 1 us survey foot equals 0.304800609601 base units, so dividing one by the other gives the direct chain-to-us survey foot factor of 65.999868.
Simple example
1 ch × 65.999868 = 65.999868 ftUS
1 chain = 65.999868 us survey feet.
Real-world example
10 ch × 65.999868 = 659.99868 ftUS
10 chains = 659.99868 us survey feet.
Conversion table
| Chain (ch) | US survey foot (ftUS) |
|---|---|
| 1 ch | 65.999868 ftUS |
| 5 ch | 329.99934 ftUS |
| 10 ch | 659.99868 ftUS |
| 21.0975 ch | 1,392.432215 ftUS |
| 42.195 ch | 2,784.86443 ftUS |
| 100 ch | 6,599.9868 ftUS |
Reverse conversion: US survey foot to Chain
65.999868 ftUS × 0.01515154545 = 1 ch
65.999868 us survey feet = 1 chain.
chains = us survey feet × 0.0151515454546
For a page dedicated to this direction, see US survey foot to Chain.
Understanding the Chain (ch)
A surveyor's chain is 66 feet.
Understanding the US survey foot (ftUS)
The US survey foot is 1200/3937 meters and is retained for legacy land records.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many us survey feet are in 1 chain?
1 chain equals 65.999868 us survey feet, using the exact defined conversion factor rather than an estimate.
How do I convert chain to us survey foot?
Multiply the chain value by 65.999868. The converter above does this instantly to whatever precision you set.
How do I convert us survey foot back to chain?
Use the reverse factor: 1 us survey foot equals 0.0151515455 chains. You can also use the swap control in the converter above to flip the direction instantly.
What is a chain?
Chain (ch) is a unit of length.
What is a us survey foot?
US survey foot (ftUS) is a unit of length.
Is the chain to us survey foot conversion exact?
Yes. Both chain and us survey foot are defined by fixed standards rather than physical artifacts, so the factor of 65.999868 used above is exact to as many digits as you choose to display.