keha mass taandatud tihedusele 8 000 kg m-3 leppetihedusega 1,2 kg m–3 õhus tugitemperatuuril 20 oC, for a weight taken at a reference temperature of 20 °C, the conventional mass is the mass of a reference weight of a density of 8 000 kg m–3 which it balances in air of a reference density of 1,2 kg m–3, conventional mass value is equal to the mass of a standard, of conventionally chosen density at a conventionally chosen temperature, which balances this body at this reference temperature in air of conventionally chosen density