Sumwise

Nautical miles to fathoms

fathoms = nautical miles × 1,012.69

Reverse: fathoms to nautical miles

How to convert nautical miles to fathoms

One nautical mile is 1,012.69 fathoms, so multiply the number of nautical miles by 1,012.69. For example, 20 nautical miles is 20 × 1,012.69 = 20,253.72 fathoms. To go back, divide by the same number, or multiply by 0.00098747.

Quick estimate

Multiplying by about 1000 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.

nautical milesfathoms
1 nmi1,012.69 fm
2 nmi2,025.37 fm
3 nmi3,038.06 fm
4 nmi4,050.74 fm
5 nmi5,063.43 fm
6 nmi6,076.12 fm
7 nmi7,088.8 fm
8 nmi8,101.49 fm
9 nmi9,114.17 fm
10 nmi10,126.86 fm
11 nmi11,139.55 fm
12 nmi12,152.23 fm
13 nmi13,164.92 fm
14 nmi14,177.6 fm
15 nmi15,190.29 fm
16 nmi16,202.97 fm
17 nmi17,215.66 fm
18 nmi18,228.35 fm
19 nmi19,241.03 fm
20 nmi20,253.72 fm
25 nmi25,317.15 fm
30 nmi30,380.58 fm
40 nmi40,507.44 fm
50 nmi50,634.3 fm
60 nmi60,761.15 fm
70 nmi70,888.01 fm
75 nmi75,951.44 fm
80 nmi81,014.87 fm
90 nmi91,141.73 fm
100 nmi101,268.59 fm
120 nmi121,522.31 fm
150 nmi151,902.89 fm
200 nmi202,537.18 fm
250 nmi253,171.48 fm
300 nmi303,805.77 fm
400 nmi405,074.37 fm
500 nmi506,342.96 fm
750 nmi759,514.44 fm
1,000 nmi1,012,685.91 fm
1,500 nmi1,519,028.87 fm
2,000 nmi2,025,371.83 fm
5,000 nmi5,063,429.57 fm
10,000 nmi10,126,859.14 fm

Questions

How many fathoms are in a nautical mile?

1,012.69 fathoms.

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

Put the value in A1 and type =A1*1012.69, 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.