Adult polar bears exhibit significant sexual dimorphism in weight:

• Male polar bears typically weigh between 300 to 800 kg (660 to 1,760 lbs), with some large males exceeding 1,700 lbs (about 770 kg) and even record individuals reaching over 1,000 kg (2,200 lbs)

. Average adult males generally range from 600 to 1,200 lbs (270 to 545 kg), standing 8 to 10 feet long

• Female polar bears are smaller, usually weighing between 150 to 300 kg (330 to 660 lbs), with common weights around 330 to 550 lbs, though pregnant females can weigh up to 500 to 1,100 lbs

Polar bear weights fluctuate seasonally, increasing after successful hunting and decreasing during leaner periods, such as summer when food is scarce

. Cubs start very small, around 1 to 2 lbs at birth, growing rapidly in their first years

. In summary, adult male polar bears weigh roughly 600 to 1,760 lbs, while females weigh about 330 to 660 lbs, with variation depending on age, health, and season.