4.5kg is how many pounds?
Best Answer: 17.3 kg to 38.139971 lb and 4.5 kg to 9.920802 lb posted by Theodore M is mostly correct.If you're worried about significant figures, 17.3 kg is 38.1 lb and 4.5 kg is 9.9 lb.est Answer: 17.3 kg to 38.139971 lb and 4.5 kg to 9.920802 lb posted by Theodore M is mostly correct.