A kilogram is a unit of mass. A litre is a unit of capacity. Without some unit of density to compare, the two units are incompatible.
Assuming you mean "How many kilos of water in 90 liters?", the answer is 90 kg.
Liters can't be converted to kilograms. Liters measure volume, while kilograms measure mass.
90 liters equates to 90,000mL (multiply liters by 1,000).
90 lbs = 40.8 kg
1.967993
69
3.6
90 US fluid ounces = 2.66161767 liters
90 cubic feet equals 2,548.5 liters.
90 US cups = 21.2929413 liters
4,000!!!!!!!!!! :0
30 Liters of water weighs 30 kilograms. Other substances have different densities and weights.