How long was The British Empire?
The British Empire lasted 418 years (1583 – 1997) across 5 major phases.
Duration Overview
Duration
418 years
Start
1583 AD
End
1997 AD
Category
Empires
414 years (1583-1997). From Newfoundland to Hong Kong handover. At peak (1920): 35.5 million km², 25% of world population.
Phases & Periods
1583 AD – 1783 AD
Colonization of Americas, Caribbean sugar islands, slave trade.
1783 AD – 1914 AD
India, Australia, Africa. 'Empire on which the sun never sets.'
1914 AD – 1945 AD
Maximum territory after WWI mandates. WWII bankrupts Britain.
1945 AD – 1970 AD
India (1947), Africa (1960s), Caribbean. Rapid withdrawal.
1970 AD – 1997 AD
Falklands (1982). Hong Kong handover (1997). 14 territories remain.
For perspective...
That's 418 years — about 17 generations. No one alive at the start could have known anyone alive at the end.