The mathematic formula to convert Kg to Lbs is: 1 kg * (2.2046 lbs / 1 kg) = 2.204622622 lbs So to convert 70 kg to lbs using the same formula, it would look like this: 70 kg * (2.2046 lbs / 1 kg) = 154.3235835 lbs ...or you can just do the simple thing and use a conversion tool like Kg to Lbs converter:-)