Sumwise

Fathoms to nautical miles

nautical miles = fathoms × 0.00098747

Reverse: nautical miles to fathoms

How to convert fathoms to nautical miles

One fathom is 0.00098747 nautical miles, so multiply the number of fathoms by 0.00098747. For example, 20 fathoms is 20 × 0.00098747 = 0.01974946 nautical miles. To go back, divide by the same number, or multiply by 1,012.69.

Quick estimate

Multiplying by about 0.001 gets within 1.3% 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.

fathomsnautical miles
1 fm0.00098747 nmi
2 fm0.00197495 nmi
3 fm0.00296242 nmi
4 fm0.00394989 nmi
5 fm0.00493737 nmi
6 fm0.00592484 nmi
7 fm0.00691231 nmi
8 fm0.00789978 nmi
9 fm0.00888726 nmi
10 fm0.00987473 nmi
11 fm0.0108622 nmi
12 fm0.01184968 nmi
13 fm0.01283715 nmi
14 fm0.01382462 nmi
15 fm0.0148121 nmi
16 fm0.01579957 nmi
17 fm0.01678704 nmi
18 fm0.01777451 nmi
19 fm0.01876199 nmi
20 fm0.01974946 nmi
25 fm0.02468683 nmi
30 fm0.02962419 nmi
40 fm0.03949892 nmi
50 fm0.04937365 nmi
60 fm0.05924838 nmi
70 fm0.06912311 nmi
75 fm0.07406048 nmi
80 fm0.07899784 nmi
90 fm0.08887257 nmi
100 fm0.0987473 nmi
120 fm0.11849676 nmi
150 fm0.14812095 nmi
200 fm0.1974946 nmi
250 fm0.24686825 nmi
300 fm0.2962419 nmi
400 fm0.3949892 nmi
500 fm0.4937365 nmi
750 fm0.74060475 nmi
1,000 fm0.987473 nmi
1,500 fm1.48121 nmi
2,000 fm1.974946 nmi
5,000 fm4.937365 nmi
10,000 fm9.87473 nmi

Questions

How many nautical miles are in a fathom?

0.00098747 nautical miles.

How do I convert fathoms to nautical miles in a spreadsheet?

Put the value in A1 and type =A1*0.00098747, 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.