How much does 1litre water weighs in grams?

Answer 1

1 litre is approximately equal to 1 kilogram, and there are 1000 grams in a kilogram.

(The actual mass of 1 litre of water varies slightly depending on how hot or cold the water is, but the approximation is almost perfectly precise at 4°C.) The above answer is accurate for the "mass" of water. The water "weight" is the amount of force produced by a given mass of water under the influence of a gravitational force. So the question has an inherent flaw since weight and grams are not compatible units. On the surface of Earth, 1 liter of water has about a 1 kilogram mass, and weighs about 9.8 Newtons or about 2.2 pounds.