Volumetric measurements are obtained from mass measurement of known density materials. The volume calibrations are either by a gravimetric method (weighing procedure) or by a volume transfer (comparative) method. For precise determination of the capacity of volumetric measures, the gravimetric method is used. In this method the capacity is determined by weighing the volume of distilled water that the vessel contains. We already know from mass metrology that, as the measurements are made in air, corrections will need to be made for air buoyancy, etc. In addition, the effects of temperature, local gravity and atmospheric pressure will also need to be applied.

The uncertainty of measurement will vary depending upon the balance used, the purity of the water, the ability to make accurate temperature measurements, the nominal value of the volume standard being calibrated/tested and the ability to make adequately accurate mass measurements.

There is a good book that covers in detail the various aspects of volume and capacity measurements, titled - Comprehensive Volume and Capacity Measurements - ISBN 81-224-1819-8, 9788122418194.

Facility for volume measurements and calibration of metallic measures .

For volume measurements by the gravimetric method, standard weights and balances are needed. The working standard weights, balances and mass comparators from a standard mass metrology laboratory are typically used until such time as the workload requires a separate set just for this purpose.

The environmental conditions required in the volume metrology laboratory will also be the same as suggested for the mass metrology laboratory.

Initially the manpower deployed for mass metrology may also be sufficient for organizing the calibration of volume measures.