Question: 1 letter how much kg?
Answer: kilograms to liters Weight of 1 liter (l) of pure water at temperature 4 °C = 1 kilogram (kg). A liter is defined as one cubic decimetre (1 l = 1 cubic dm). 1 l = 1kg of water = 0.001 cubic m = 0.264172052 US gallons = 1.05668821 US quarts.