There are 2.20462 pounds in 1 kilogram. So, to convert 500-690 kilograms to pounds, we need to multiply each kilogram by 2.20462.

500 kilograms = 500 x 2.20462 = 1,102.31 pounds

690 kilograms = 690 x 2.20462 = 1,521.916 pounds

Therefore, 500-690 kilograms is equivalent to 1,102.31-1,521.916 pounds.