Military Rank Equivalence

Rank Ladder Highest first

🇬🇧 United Kingdom · Navy	NATO equivalent	United States · Navy 🇺🇸
Officers
Admiral of the Fleet	OF-10 Marshal / General of the Army	Fleet admiral
Admiral	OF-9 General	Admiral
Vice admiral	OF-8 Lieutenant General	Vice admiral
Rear admiral	OF-7 Major General	Rear admiral
Commodore	OF-6 Brigadier General	Rear admiral (lower half)
Captain	OF-5 Colonel	Captain
Commander	OF-4 Lieutenant Colonel	Commander
Lieutenant commander	OF-3 Major / Commandant	Lieutenant commander
Lieutenant	OF-2 Captain / 1st Lieutenant	Lieutenant
Sub lieutenant Midshipman	OF-1 Lieutenant	Lieutenant (junior grade) Ensign
Officer Cadet	OF-D Student Officer	Midshipman / officer candidate
Enlisted ranks
Warrant officer class 1	OR-9 Sergeant Major	Command master chief petty officer Master chief petty officer
Warrant officer class 2	OR-8 1st Sergeant	Command senior chief petty officer Senior chief petty officer
Chief petty officer	OR-7 Sergeant 1st Class	Chief petty officer
Petty officer	OR-6 Staff Sergeant	Petty officer first class
No equivalent	OR-5 Sergeant	Petty officer second class
Leading rate	OR-4 Corporal	Petty officer third class
No equivalent	OR-3 Private 1st Class	Seaman
Able rate	OR-2 Private	Seaman apprentice
No equivalent	OR-1 Private	Seaman recruit

Tiers neither force uses are hidden. An OF/OR code held by only one of the two is kept and marked — a missing tier is itself a difference in how the two hierarchies are built.