# Fathoms to Leagues (ftm to lea)

Source: https://www.unitconvertercalculator.com/length/fathoms-to-leagues/

**1 ftm = 0.00037878787878788 lea**

One fathom equals approximately 0.000379 leagues (English league of 3 miles). A league contains about 2,640 fathoms. Jules Verne's 'twenty thousand leagues' of horizontal submarine travel would equal about 52.8 million fathoms of depth if measured vertically. Fathoms measure depth; leagues measure literary distance.

## Formula

Convert Fathoms to Leagues

## Conversion Table

| Fathoms (ftm) | Leagues (lea) |
|---|---|
| 1 ftm | 0.00037878787878788 lea |
| 10 ftm | 0.0037878787878788 lea |
| 50 ftm | 0.018939393939394 lea |
| 100 ftm | 0.037878787878788 lea |
| 500 ftm | 0.18939393939394 lea |
| 1000 ftm | 0.37878787878788 lea |
| 5000 ftm | 1.8939393939394 lea |
| 6000 ftm | 2.2727272727273 lea |
| 10000 ftm | 3.7878787878788 lea |
| 50000 ftm | 18.939393939394 lea |

## Units

### Fathom (ftm)

Exactly 6 feet (1.8288 m). Traditionally used to measure water depth in nautical contexts. Originally based on the span of outstretched arms.

### League (lea)

Exactly 3 statute miles (4828.032 m). A historical unit of distance, often associated with the distance a person could walk in one hour.

## Background

Verne's twenty thousand leagues (60,000 miles) equals about 52.8 million fathoms. The entire ocean at its deepest point (6,011 fathoms) is only about 2.28 leagues deep. The league is a horizontal distance unit; the fathom is primarily a vertical one. Pairing them requires imagining depth as distance.

## Good to Know

Verne's title is often misunderstood as referring to depth. But 20,000 leagues (60,000 miles) of depth would extend well past the center of the Earth. Verne meant distance traveled horizontally beneath the waves, at depths of only a few hundred fathoms.

## FAQ

### How many leagues is 1 fathom?

One fathom equals approximately 0.000379 leagues (1/2,640 of an English league). A league contains about 2,640 fathoms.

### How many fathoms are in 1 league?

One English league (3 statute miles / 15,840 feet) contains approximately 2,640 fathoms (15,840 / 6 = 2,640).

### Did Verne measure in fathoms or leagues?

Verne used leagues for horizontal submarine travel distance, not depth. The title refers to 20,000 leagues of distance traveled, not depth. The submarine in the novel operated at a few hundred fathoms depth.

## Non-Frequently Asked Questions

### Did Verne's Nautilus ever measure depth in leagues?

No. Verne used leagues for horizontal travel distance and meters for depth. If the Nautilus had dived to 4 leagues of depth (19.3 km), it would be nearly twice the depth of the Mariana Trench. Even Verne knew that was too deep for fiction.

### How many leagues deep is the Mariana Trench?

About 2.27 leagues (6,011 fathoms / 2,640 fathoms per league). The entire ocean at its deepest is barely 2 leagues. Verne's 20,000 leagues was horizontal distance. Vertically, 20,000 leagues would punch through the Earth's core multiple times.

### Is 'leagues under the sea' a depth or a distance?

A distance. Verne's '20,000 Leagues Under the Seas' describes the total distance the Nautilus traveled while submerged, not its depth. The subtitle in French ('Vingt mille lieues sous les mers') means 'under the seas,' not 'below sea level.' It is the world's most famous unit conversion misunderstanding.

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## See Also

- [Leagues to Fathoms](https://www.unitconvertercalculator.com/length/leagues-to-fathoms/)