A fathom is six feet.
Fathoms to Leagues Converter — ftm to lea
Convert Fathom (ftm) to League (lea) using the exact conversion factor (1 fathom = 0.0003787879 league). See the formula, worked examples, and conversion table.
Fathoms 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 1.8288 / 4828.032.
Length uses the meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Fathoms to Leagues
Fathom and League both measure length. Specifically: A fathom is six feet, and a league is commonly treated as three statute miles.
Formula
leagues = fathoms × 0.000378787878788
This factor comes from each unit's defined relationship to the category's base unit: 1 fathom equals 1.8288 base units, and 1 league equals 4828.032 base units, so dividing one by the other gives the direct fathom-to-league factor of 0.000378787878788.
Simple example
1 ftm × 0.0003787878788 = 0.0003787879 lea
1 fathom = 0.0003787879 leagues.
Real-world example
10 ftm × 0.0003787878788 = 0.0037878788 lea
10 fathoms = 0.0037878788 leagues.
Conversion table
| Fathom (ftm) | League (lea) |
|---|---|
| 1 ftm | 0.0003787879 lea |
| 5 ftm | 0.0018939394 lea |
| 10 ftm | 0.0037878788 lea |
| 21.0975 ftm | 0.0079914773 lea |
| 42.195 ftm | 0.0159829546 lea |
| 100 ftm | 0.0378787879 lea |
Reverse conversion: League to Fathom
0.0003787879 lea × 2640 = 1.000000056 ftm
0.0003787879 leagues = 1.000000056 fathoms.
fathoms = leagues × 2640
For a page dedicated to this direction, see League to Fathom.
Understanding the Fathom (ftm)
A fathom is six 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 fathom?
1 fathom equals 0.0003787879 leagues, using the exact defined conversion factor rather than an estimate.
How do I convert fathom to league?
Multiply the fathom value by 0.0003787878788. The converter above does this instantly to whatever precision you set.
How do I convert league back to fathom?
Use the reverse factor: 1 league equals 2,640 fathoms. You can also use the swap control in the converter above to flip the direction instantly.
What is a fathom?
Fathom (ftm) is a unit of length.
What is a league?
League (lea) is a unit of length.
Is the fathom to league conversion exact?
Yes. Both fathom and league are defined by fixed standards rather than physical artifacts, so the factor of 0.0003787878788 used above is exact to as many digits as you choose to display.