If person weighs 100bls whats the weight in kilograms?
The person would be about 89 kilograms in weight. The person would still have a mass of 100 kilograms, of course. The strict scientific unit of weight is the "newton" because that is the unit of force and weight exerts a force. The 100 kg person weighs 890 newtons on Venus. However, normally we say "kilograms" or "kilograms weight", as long as we are clear that weight and mass are different.
The weight of an object depends on the density of the material being measured and different items will have different weights for the same volume, for example: 32.368 cubic metres of water weighs 32368 kilograms 32.368 cubic metres of diesel fuel weighs 28,645.68 kilograms 32.368 cubic metres of vegetable oil weighs about 30,645.78 kilograms 32.368 cubic metres of SAY 10w40 oil weighs about 27,729.66 kilograms 32.368 cubic metres of ethanol (undiluted) weighs about 25,538.35 kilograms…