Feet to fathoms
fathoms = feet × 0.16666667
Reverse: fathoms to feet
How to convert feet to fathoms
One foot is 0.16666667 fathoms, so multiply the number of feet by 0.16666667. For example, 20 feet is 20 × 0.16666667 = 3.333333 fathoms. To go back, divide by the same number, or multiply by 6.
Quick estimate
Multiplying by about 0.2 gets within 20.0% of the exact answer, which is enough to check that a result makes sense.
Where it comes up
Length conversions come up in DIY and building plans, running and cycling distances, maps, clothing sizes and travel between countries that use metric and imperial units.
| feet | fathoms |
|---|---|
| 1 ft | 0.16666667 fm |
| 2 ft | 0.33333333 fm |
| 3 ft | 0.5 fm |
| 4 ft | 0.66666667 fm |
| 5 ft | 0.83333333 fm |
| 6 ft | 1 fm |
| 7 ft | 1.166667 fm |
| 8 ft | 1.333333 fm |
| 9 ft | 1.5 fm |
| 10 ft | 1.666667 fm |
| 11 ft | 1.833333 fm |
| 12 ft | 2 fm |
| 13 ft | 2.166667 fm |
| 14 ft | 2.333333 fm |
| 15 ft | 2.5 fm |
| 16 ft | 2.666667 fm |
| 17 ft | 2.833333 fm |
| 18 ft | 3 fm |
| 19 ft | 3.166667 fm |
| 20 ft | 3.333333 fm |
| 25 ft | 4.166667 fm |
| 30 ft | 5 fm |
| 40 ft | 6.666667 fm |
| 50 ft | 8.333333 fm |
| 60 ft | 10 fm |
| 70 ft | 11.666667 fm |
| 75 ft | 12.5 fm |
| 80 ft | 13.333333 fm |
| 90 ft | 15 fm |
| 100 ft | 16.666667 fm |
| 120 ft | 20 fm |
| 150 ft | 25 fm |
| 200 ft | 33.333333 fm |
| 250 ft | 41.666667 fm |
| 300 ft | 50 fm |
| 400 ft | 66.666667 fm |
| 500 ft | 83.333333 fm |
| 750 ft | 125 fm |
| 1,000 ft | 166.666667 fm |
| 1,500 ft | 250 fm |
| 2,000 ft | 333.333333 fm |
| 5,000 ft | 833.333333 fm |
| 10,000 ft | 1,666.67 fm |
Questions
How many fathoms are in a foot?
0.16666667 fathoms.
How do I convert feet to fathoms in a spreadsheet?
Put the value in A1 and type =A1*0.16666667, then fill the formula down the column.
Are the values in the table exact?
They are calculated from the exact definitions of the units and rounded only for display. Open any row for the full working.