Fathom to Kilometer Converter
Length · unit-converter
Convert Fathom to Kilometer with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations use SI-based definitions (international yard, nautical mile, etc.).
Calculator
From: Fathom (fathom)
To: Kilometer (km)
About Fathom
The fathom is an imperial/nautical depth unit equal to 6 feet (1.8288 meters). It is common in marine contexts and charted water depths.
About Kilometer
The kilometer is an SI unit equal to 1,000 meters. It is the standard unit for longer distances in most countries that use the metric system.
How to convert fathoms to kilometers
1 fathom is equal to 0.0018288 kilometer:
1 fathom = (1.8288 m ÷ 1000 m) km = 0.0018288 km
Each fathom is defined as 1.8288 m and each kilometer as 1000 m, so one fathom equals 1.8288 ÷ 1000 km = 0.0018288 km.
Let d(fathom) be the numeric value of the same length measured in Fathom (fathom), and d(km) the value in Kilometer (km). Then:
d(km) = d(fathom) × (1.8288 / 1000)
Equivalently, divide by how many fathom fit into one km (meters per km divided by meters per fathom):
d(km) = d(fathom) ÷ 546.80664916885394
Or: kilometer = fathom ÷ 546.80664916885394
Examples
Example #1: Convert 20 fathom to kilometer
20 fathom = 20 fathom × (1.8288/1000) km = 0.036576 km
20 fathom = 20 fathom ÷ 546.80664916885394 = 0.036576 km
Example #2: Convert 50 fathom to kilometer
50 fathom = 50 fathom × (1.8288/1000) km = 0.09144 km
50 fathom = 50 fathom ÷ 546.80664916885394 = 0.09144 km
Summary
To convert Fathom to Kilometer, multiply the value in fathom by the ratio of meters per fathom divided by meters per km. Equivalently: value_km = value_fathom × (1.8288 / 1000). Numerically, 1 fathom equals 0.0018288 km.
Relationship context
You are converting between US customary / imperial (Fathoms) and metric (SI) (Kilometers). Metric units are decimal; imperial units use inches, feet, yards, and miles tied to the international yard definition. Nautical miles are defined in meters (1 nmi = 1,852 m). This tool uses SI-based factors so results stay consistent with modern standards.
Conversion tables
| Fathom (fathom) | Kilometer (km) |
|---|---|
| 0.1 | 0.00018288 |
| 1 | 0.0018288 |
| 2 | 0.0036576 |
| 3 | 0.0054864 |
| 4 | 0.0073152 |
| 5 | 0.009144 |
| 6 | 0.0109728 |
| 7 | 0.0128016 |
| 8 | 0.0146304 |
| 9 | 0.0164592 |
| Fathom (fathom) | Kilometer (km) |
|---|---|
| 10 | 0.018288 |
| 20 | 0.036576 |
| 30 | 0.054864 |
| 40 | 0.073152 |
| 50 | 0.09144 |
| 60 | 0.109728 |
| 70 | 0.128016 |
| 80 | 0.146304 |
| 90 | 0.164592 |
| 100 | 0.18288 |