A surveyor's chain is 66 feet.
Chains to Leagues Converter — ch to lea
Convert Chain (ch) to League (lea) using the exact conversion factor (1 chain = 0.0041666667 league). See the formula, worked examples, and conversion table.
Chains to Leagues 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 league is commonly treated as three statute miles.
Result = input x 20.1168 / 4828.032.
Length uses the meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Chains to Leagues
Chain and League both measure length. Specifically: A surveyor's chain is 66 feet, and a league is commonly treated as three statute miles.
Formula
leagues = chains × 0.00416666666667
This factor comes from each unit's defined relationship to the category's base unit: 1 chain equals 20.1168 base units, and 1 league equals 4828.032 base units, so dividing one by the other gives the direct chain-to-league factor of 0.00416666666667.
Simple example
1 ch × 0.004166666667 = 0.0041666667 lea
1 chain = 0.0041666667 leagues.
Real-world example
10 ch × 0.004166666667 = 0.0416666667 lea
10 chains = 0.0416666667 leagues.
Conversion table
| Chain (ch) | League (lea) |
|---|---|
| 1 ch | 0.0041666667 lea |
| 5 ch | 0.0208333333 lea |
| 10 ch | 0.0416666667 lea |
| 21.0975 ch | 0.08790625 lea |
| 42.195 ch | 0.1758125 lea |
| 100 ch | 0.4166666667 lea |
Reverse conversion: League to Chain
0.0041666667 lea × 240 = 1.000000008 ch
0.0041666667 leagues = 1.000000008 chains.
chains = leagues × 240
For a page dedicated to this direction, see League to Chain.
Understanding the Chain (ch)
A surveyor's chain is 66 feet.
Understanding the League (lea)
A league is commonly treated as three statute miles.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many leagues are in 1 chain?
1 chain equals 0.0041666667 leagues, using the exact defined conversion factor rather than an estimate.
How do I convert chain to league?
Multiply the chain value by 0.004166666667. The converter above does this instantly to whatever precision you set.
How do I convert league back to chain?
Use the reverse factor: 1 league equals 240 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 league?
League (lea) is a unit of length.
Is the chain to league conversion exact?
Yes. Both chain and league are defined by fixed standards rather than physical artifacts, so the factor of 0.004166666667 used above is exact to as many digits as you choose to display.