# Furlongs to Nautical Miles (fur to nmi)

Source: https://www.unitconvertercalculator.com/length/furlongs-to-nautical-miles/

**1 fur = 0.10862203023758 nmi**

One furlong equals approximately 0.1087 nautical miles. About 9.2 furlongs make one nautical mile. The furlong is a land unit (horse racing); the nautical mile is a sea unit (navigation). Both come from English measurement tradition but serve different environments.

## Formula

Convert Furlongs to Nautical Miles

## Conversion Table

| Furlongs (fur) | Nautical Miles (nmi) |
|---|---|
| 0.5 fur | 0.05431101511879 nmi |
| 1 fur | 0.10862203023758 nmi |
| 2 fur | 0.21724406047516 nmi |
| 4 fur | 0.43448812095032 nmi |
| 8 fur | 0.86897624190065 nmi |
| 10 fur | 1.0862203023758 nmi |
| 20 fur | 2.1724406047516 nmi |
| 50 fur | 5.4311015118791 nmi |
| 100 fur | 10.862203023758 nmi |
| 200 fur | 21.724406047516 nmi |
| 500 fur | 54.311015118791 nmi |
| 1000 fur | 108.62203023758 nmi |

## Units

### Furlong (fur)

Exactly 660 feet or one-eighth of a mile (201.168 m). Originally the length of a plowed furrow. Still used in horse racing.

### Nautical Mile (nmi)

Exactly 1852 meters by international agreement. Based on one minute of arc of latitude at the Earth's surface. The standard unit for maritime and air navigation.

## Background

A nautical mile is about 9.2 furlongs (1,852 m vs 201.168 m per furlong). The Kentucky Derby (10 furlongs) is about 1.087 nautical miles. A 12 NM territorial waters boundary is about 110 furlongs from shore. These units rarely meet in practice.

## Good to Know

Horse racing uses furlongs. Yacht racing uses nautical miles. Both are racing sports, but their measurement units never cross the shore line.

## FAQ

### How many nautical miles is 1 furlong?

One furlong equals approximately 0.1087 nautical miles. Since 1 furlong = 201.168 m and 1 NM = 1,852 m, divide 201.168 by 1,852.

### How many furlongs are in 1 nautical mile?

One nautical mile contains approximately 9.206 furlongs.

### Are furlongs ever used at sea?

No. Furlongs are strictly a land unit. At sea, distances use nautical miles, cable lengths, and fathoms. The two systems never mix.

## Non-Frequently Asked Questions

### Could you race a horse across the English Channel?

The Channel at its narrowest is about 18.2 NM or about 166 furlongs. At racing pace, a horse could cover that in about 33 minutes of flat-out galloping. But horses cannot gallop on water, and the Channel is wet. Swimming the Channel takes about 10-14 hours for humans. Horses are faster on land but slower in the sea.

### Is a furlong useful in navigation?

No. Nautical navigation uses nautical miles, cables (1/10 NM), and degrees. Nobody plots a course in furlongs. A furlong (0.1089 NM) is too small for ocean navigation and too agricultural for maritime charts. Keep furlongs on the racetrack.

### How many furlongs is the Atlantic Ocean?

The Atlantic is about 2,850 NM wide (New York to London). That is about 26,146 furlongs. A horse racing that distance at 12 seconds per furlong would take about 3.63 days of continuous galloping. Transatlantic horse racing: impractical but mathematically defined.

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## See Also

- [Nautical Miles to Furlongs](https://www.unitconvertercalculator.com/length/nautical-miles-to-furlongs/)