Convert length and distance units — meters, feet, inches, kilometers, miles, light years and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 ftm | 1.8288e-06 km | |
| 0.01 ftm | 1.8288e-05 km | |
| 0.1 ftm | 0.00018288 km | |
| 1 ftm | 0.0018288 km | |
| 5 ftm | 0.009144 km | |
| 10 ftm | 0.018288 km | |
| 50 ftm | 0.09144 km | |
| 100 ftm | 0.18288 km | |
| 1000 ftm | 1.8288 km |
Multiply the number of Fathoms by 0.0018288 to get Kilometers. Formula: km = ftm × 0.0018288. Example: 10 ftm × 0.0018288 = 0.018288 km. To reverse, divide Kilometers by 0.0018288 to get Fathoms.
| Fathom (ftm) | Kilometer (km) |
|---|---|
| 0.001 ftm | 1.8288e-06 km |
| 0.01 ftm | 1.8288e-05 km |
| 0.1 ftm | 0.00018288 km |
| 0.5 ftm | 0.0009144 km |
| 1 ftm | 0.0018288 km |
| 2 ftm | 0.0036576 km |
| 5 ftm | 0.009144 km |
| 10 ftm | 0.018288 km |
| 20 ftm | 0.036576 km |
| 50 ftm | 0.09144 km |
| 100 ftm | 0.18288 km |
| 250 ftm | 0.4572 km |
| 500 ftm | 0.9144 km |
| 1000 ftm | 1.8288 km |
| 10000 ftm | 18.288 km |
To convert Fathom to Kilometer, multiply by 0.0018288. Example: 10 ftm = 0.018288 km
To convert Kilometer back to Fathom, divide by 0.0018288 (multiply by 546.807). Use the swap button above.
Start with 100 Fathoms = 0.18288 km as your reference point. Scale up or down from there.
Legacy ocean depth data recorded in fathoms is being converted to kilometres for integration with modern oceanographic databases and international research platforms that exclusively use SI units.
Submarine communications cable routes specify water depths in kilometres for engineering planning, while existing seabed survey data from admiralty charts uses fathoms — conversion needed in cable route assessment.
Deep-sea mineral resource assessments describe nodule field depths in fathoms from historic surveys but calculate deposit volumes and extraction costs using kilometre-based depth and area measurements.
Hydrologists integrating historical tidal records in fathoms with modern coastal flood models in metres and kilometres require systematic conversion for consistent hazard assessment across historical and contemporary datasets.
Port authorities and shipping companies express channel depths in fathoms for navigational safety while calculating dredging costs and cargo capacity using kilometre-based route distance and depth economics.
Offshore wind and tidal energy site assessments reference admiralty chart depths in fathoms but calculate energy yield and infrastructure costs using kilometre-based depth and distance metrics.
The Fathom is a unit of Length measurement (symbol: ftm). 1 ftm = 0.0018288 km. Used in scientific and practical Length measurement applications.
The Kilometer is a unit of Length measurement (symbol: km). It is part of an internationally recognised measurement system used alongside the Fathom.
The fathom derives from the Old English 'fæthm', meaning the span of outstretched arms — roughly 6 feet or 1.8 metres. It was the primary depth measurement unit used by mariners for millennia, recorded in the Bible and used by ancient Greeks. Samuel Pepys referenced fathoms in 17th-century naval logs. The word 'fathom' also entered English as a verb meaning to understand something deeply — from the idea of plumbing the depths. Despite metrication, fathoms remain on admiralty charts and in nautical tradition worldwide.
The kilometre was introduced in 1795 as part of the French metric system — exactly 1,000 metres. France was the first country to adopt a universal decimal measurement system, replacing a chaotic patchwork of regional units. The metre itself was defined as one ten-millionth of the distance from the North Pole to the equator through Paris. By the 20th century, the kilometre had become the world's standard unit for road distances, replacing miles in country after country. The US remains the only major exception, still officially using miles.
Common use: Fathom to Kilometer conversion is needed when working with international standards, scientific publications, or reference materials that use different unit systems for Length measurement.