Fathom to Nautical mile Converter (and vice versa)

Created by: tinycalcs.com/en
Number of supported units: 2
Last update: 2026

This converter allows you to convert fathoms [fm.] to nautical miles [NM] or nautical miles [NM] to fathoms [fm.]. Calculations are performed in both directions. The calculation result and the entered value are displayed with up to 20 decimal places for maximum accuracy.

1 fathom [fm.] ≈ 9.875 * 10-4 nautical miles [NM]1 nautical mile [NM] ≈ 1,012.6859 fathoms [fm.]

Convert fathoms to nautical miles

There are two simple ways to convert fathoms [fm.] to nautical miles [NM]. In the first calculation method, the value in fathoms [fm.] is divided by the rounded conversion factor of 1,012.6859. The second method multiplies the value in fathoms [fm.] by the rounded conversion factor of 9.875 * 10-4.

  • Nautical miles [NM] ≈ fathoms [fm.] ÷ 1,012.6859
  • Nautical miles [NM] ≈ fathoms [fm.] * 9.875 * 10-4

However, rounded conversion values are only suitable for rough conversions, as rounding errors can occur in the calculation result. The most accurate conversion of fathoms [fm.] to nautical miles [NM] can be achieved using the following calculation method.

  • Nautical miles [NM] = fathoms [fm.] ÷ 1,852 * 18,288 ÷ 104

Convert nautical miles to fathoms

Converting nautical miles [NM] to fathoms [fm.] is easy and can be done in two ways. The first method involves multiplication, in which the value in nautical miles [NM] is multiplied by the rounded conversion factor of 1,012.6859. The second variant is a division. Here, the value in nautical miles [NM] is divided by the rounded conversion factor of 9.875 * 10-4.

  • Fathoms [fm.] ≈ nautical miles [NM] * 1,012.6859
  • Fathoms [fm.] ≈ nautical miles [NM] ÷ (9.875 * 10-4)

However, rounded conversion values do not allow for exact calculations because rounding errors can occur in the calculation result. The most accurate conversion of nautical miles [NM] to fathoms [fm.] can be achieved using the following calculation method.

  • Fathoms [fm.] = nautical miles [NM] * 1,852 ÷ 18,288 * 104

Converter

Decimal places

How it's calculated

Factor: 
≈ 1,012.686
Nautical miles = Fathoms ÷ 1,852 * 18,288 ÷ 104
Fathoms = Nautical miles * 1,852 ÷ 18,288 * 104

To all available units

Fathoms

Parsecs

Fathoms

Planck length

Femtometers

Ångströms

Femtometers

Astronomical units

Femtometers

Cable lengths

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