Kilometers to Fathoms
Convert kilometers to fathoms instantly. 1 km = 546.8066491689 ftm. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert kilometers to fathoms
To convert kilometers to fathoms, multiply by 546.8066491689. The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.
ftm = km × 546.8066491689
Kilometers to Fathoms conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| Kilometers | Fathoms |
|---|---|
| 1 km | 546.806649 ftm |
| 2 km | 1,093.61 ftm |
| 3 km | 1,640.42 ftm |
| 5 km | 2,734.03 ftm |
| 10 km | 5,468.07 ftm |
| 20 km | 10,936.13 ftm |
| 25 km | 13,670.17 ftm |
| 50 km | 27,340.33 ftm |
| 100 km | 54,680.66 ftm |
| 500 km | 273,403.32 ftm |
| 1,000 km | 546,806.65 ftm |
What is a kilometer?
A thousand metres. The standard road-distance unit almost everywhere except the US and UK.
What is a fathom?
Six feet. The traditional unit for water depth on nautical charts.
The formula
ftm = km × 546.8066491689
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the Kilometers to Fathoms
- Type the number of kilometers you want to convert.
- Read the result in fathoms straight away — there is no button to press.
- Check the table below for the values that come up most often, or reverse the conversion with the linked fathoms to kilometers page.
Kilometers to Fathoms — frequently asked questions
How many fathoms are in a kilometer?
One kilometer equals 546.8066491689 ftm. ftm = km × 546.8066491689
What is the formula to convert kilometers to fathoms?
The formula is ftm = km × 546.8066491689. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert fathoms back to kilometers?
Divide instead of multiplying: one fathom is 0.0018288 km. The reverse converter is linked in the related tools list.
Is this conversion exact?
Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.
Is this kilometers to fathoms free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
What people search for
This page answers each of these searches. They are the exact phrases visitors use to find the kilometers to fathoms.
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About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 15, 2026 · Calculation runs client-side · No data collected · Report an error