90 kilograms is approximately 198.42 pounds and 14.17 stone. Weight can be measured in terms of mass (kilograms) and force (pounds), with pounds being the English equivalent to newtons. To convert 90kg to pounds, we use the conversion factor that 1 kilogram is approximately equal to 2.20462 pounds. By multiplying 90 kg by this factor, we get: 90 kg imes 2.20462 = 198.4158 pounds Therefore, 90 kilograms is equivalent to approximately 198.42 pounds. Now, to convert 90kg to stone, we need to use the conversion factor that 1 stone is equal to 6.35029 kilograms. By dividing 90 kg by this factor, we get: 90 kg / 6.35029 = 14.1735 stone So, 90 kilograms is approximately equivalent to 14.17 stone. It is important to note that weight can be measured in both mass (kilograms) and force (pounds). However, in everyday life, especially in countries using the imperial system, weight is commonly referred to in terms of pounds. The confusion between mass and weight often arises because the difference is not important in most daily situations.