This International Standard specifies multiplication factors for the correction of the volume of water transferred from a primary measure to a tank for changes arising from temperature differences during the determination of the capacity of the tank at reference temperature. NOTE This International Standard does not set out a calibration procedure nor consider the uncertainties in temperature measurement, for which reference should be made to other standards. Equations are given in annex A for the determination of the density of air-free and air-saturated, pure water in the temperature range 1,0 oC to 40 oC for temperatures expressed in terms of the ITS-90 International Temperature Scale. A calculation routine is also provided in annex B for the combined water and metal correction factor that is applied when determining the capacity of the tank at reference temperature.