Miles to Nautical Miles Converter
Enter a value to instantly convert between length units.
1 Mile = 0.869 Nautical Mile
Key Formulas
Centimeter → Inch
in = cm × 0.393701Kilometer → Mile
mi = km × 0.621371Foot → Meter
m = ft × 0.3048Inch → Centimeter
cm = in × 2.54Formula
nmi = mi × (1609.344 / 1852)Converting statute miles to nautical miles multiplies by 1609.344 / 1852, about 0.869 nautical miles per mile. A statute mile is 1609.344 m and the international nautical mile is 1852 m, so 100 mi comes to about 86.9 nmi. Pilots and mariners use nautical miles because they pair with knots and with latitude. NIST footnote 20 fixes the nautical mile at 1852 m, a definition that does not follow any one latitude arc. The statute mile rests on the international foot, as the NIST revised definitions explain.
Source: NIST named international length definitions (definition-derived arithmetic)
Reviewed by the Convert Calc editorial team · Last reviewed: · see our methodology
Frequently Asked Questions
Real-World Examples
A 100 statute mile trip compared with a sea chart distance.
100 mi = 86.89762419 nmi
A 3 mile walk along a harbor, in nautical miles.
3 mi = 2.606928726 nmi
A 25 mile ferry route, in nautical miles.
25 mi = 21.72440605 nmi
A 500 mile flight leg, in nautical miles.
500 mi = 434.488121 nmi