According to Baidu Encyclopedia, kilogram (symbol kg) is the basic unit to measure quality in the international system of units, and it is also one of the most commonly used basic units in daily life. And milliliter (symbol ml) is the unit of volume, which is a different physical quantity and needs to be converted by density. According to Sina. Com, depending on the density, the same volume of matter may have different mass because of the different density.
According to the formula: ρ=m/v, the mass m or volume v can be changed. Variation form: m = ρ v; V=m/ρ The density of water is 1 gram per cubic centimeter. Because 1 cm3 is equal to 1 ml. It can also be said: 1 gram per milliliter. Conversion: 1 kg equals 1 kg, 1 kg equals 2 kg, and the symbol means 1kg= 1 kg equals 2 kg. 1kg water volume is equal to: mass divided by density; That is, m/ρ =1000g ÷1g/ml =1000ml.