Convert length and distance units — meters, feet, inches, kilometers, miles, light years and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 km | 0.546807 ftm | |
| 0.01 km | 5.46807 ftm | |
| 0.1 km | 54.6807 ftm | |
| 1 km | 546.807 ftm | |
| 5 km | 2734.03 ftm | |
| 10 km | 5468.07 ftm | |
| 50 km | 27340.3 ftm | |
| 100 km | 54680.7 ftm | |
| 1000 km | 546807 ftm |
Multiply the number of Kilometers by 546.807 to get Fathoms. Formula: ftm = km × 546.807. Example: 10 km × 546.807 = 5468.07 ftm. To reverse, divide Fathoms by 546.807 to get Kilometers.
| Kilometer (km) | Fathom (ftm) |
|---|---|
| 0.001 km | 0.546807 ftm |
| 0.01 km | 5.46807 ftm |
| 0.1 km | 54.6807 ftm |
| 0.5 km | 273.403 ftm |
| 1 km | 546.807 ftm |
| 2 km | 1093.61 ftm |
| 5 km | 2734.03 ftm |
| 10 km | 5468.07 ftm |
| 20 km | 10936.1 ftm |
| 50 km | 27340.3 ftm |
| 100 km | 54680.7 ftm |
| 250 km | 136702 ftm |
| 500 km | 273403 ftm |
| 1000 km | 546807 ftm |
| 10000 km | 5468070 ftm |
To convert Kilometer to Fathom, multiply by 546.807. Example: 10 km = 5468.07 ftm
To convert Fathom back to Kilometer, divide by 546.807 (multiply by 0.0018288). Use the swap button above.
Start with 100 Kilometers = 54680.7 ftm as your reference point. Scale up or down from there.
Legacy oceanographic depth datasets in fathoms are being converted to metres and kilometres for integration with modern ocean mapping databases. Researchers convert km-scale modern data back to fathoms when comparing with historic surveys.
Submarine cable route documents express water depth in fathoms from admiralty charts and route length in kilometres for engineering planning — cable engineers convert between both units in the same feasibility study.
Fishing ground management documents describe operating depth in fathoms and ground extent in kilometres. Fisheries managers convert between the two when consolidating data from charts and GPS track logs.
Naval commanders planning submarine operations use kilometres for horizontal navigation distances while fathoms describe water depth from traditional admiralty charts — both units appear simultaneously in operational planning documents.
Hydrographic offices converting historic fathom-based admiralty charts to modern kilometre-based digital charts convert fathom soundings to kilometres for depth contour generation in ECDIS-compliant electronic nautical charts.
Offshore wind and oil platform site assessments express water depth in fathoms from survey data and site dimensions in kilometres for consenting — environmental impact assessments reference both units throughout.
The Kilometer is a unit of Length measurement (symbol: km). 1 km = 546.807 ftm. Used in scientific and practical Length measurement applications.
The Fathom is a unit of Length measurement (symbol: ftm). It is part of an internationally recognised measurement system used alongside the Kilometer.
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 for road distances.
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. 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 worldwide.
Common use: Kilometer to Fathom conversion is needed when working with international standards, scientific publications, or reference materials that use different unit systems for Length measurement.