Length
system unit code
(other)
symbol notes sample
default conversion
combinations
Maritime units nautical mile nmi nmi the international standard nautical mile 1.0 nmi (1.9 km; 1.2 mi)
nautical mile oldUKnmi
(admiralty nmi)
nmi 6080 ft
the pre-1970 British nautical mile
1.0 nmi (1.9 km; 1.2 mi)
Brnmi (Brit) nmi
admi nmi (admiralty)
nautical mile oldUSnmi nmi 6080.2 ft
the pre-1954 US nautical mile
1.0 nmi (1.9 km; 1.2 mi)
pre1954USnmi (pre‑1954 US) nmi
pre1954U.S.nmi (pre‑1954 U.S.) nmi

(end Maritime units)