45Lb------kg

The conversion factor between pounds (lb) and kilograms (kg) is 1 lb = 0.453592 kg.

Therefore, to convert 45 lb to kg, you would multiply 45 by 0.453592.

45 lb * 0.453592 kg/lb = 20.41164 kg

Therefore, 45 lb is equal to 20.41164 kg.