In recent years, industrial and technological requirements for mass metrology, with uncertainties at, or beyond, the current state of the art, have increased. Key to meeting these requirements is the reliable and effective realisation of the mass scale, with appropriate uncertainties. However, this capability does not exist yet in some small and developing NMIs. The overall aim of this project is to improve calibration methods for the realisation of the mass scale in emerging countries in the range from 1 mg to 20 kg. In addition, the primary mass laboratories will be able to provide calibration services at a higher level with improved uncertainty budgets. This project will include the development of a guideline for the dissemination of the mass unit with respect to the new definition of kilogram and software tools for the determination of the calibration results and their respective uncertainties.