The mass of 1 ml of water is approximately 1 gram under standard conditions. This relationship is due to the density of water, which is about 1 g/ml at a temperature of 4°C.
Water’s density can change slightly with temperature and pressure, but for most practical purposes, especially at room temperature, you can confidently say that 1 ml of water weighs 1 gram. This simple conversion makes calculations involving water straightforward in various scientific and everyday contexts.