ILAC and BIPM agreed to replace the term ‘Best Measurement Capability’ (BMC) previously used within the scope of accreditation of calibration laboratories by the term ‘Calibration and Measurement Capability’ (CMC) from Appendix C of the Mutual Recognition Arrangement of the International Committee for Weights and Measures (CIPM MRA). The aim of this expert report is to provide accredited calibration laboratories with detailed information in order to help them determine and evaluate the best calibration and measurement capabilities and the smallest achievable measurement uncertainties when calibrating non-automatic weighing instruments. The CMC to be determined must describe the measurement uncertainty for the best available weighing instrument. It must be possible to calibrate this weighing instrument in such a way that the stated CMC is demonstrably achieved. Particular attention is paid to the term ‘best available weighing instrument’. In addition, this report outlines the specifications and assumptions that apply in order to determine the necessary measurement uncertainty contributions. Finally, a uniform, rule-compliant presentation of CMC data (calibration and measurement capabilities) in accordance with ILAC-P14 and ILAC-G18 (e.g. in the appendices to the accreditation certificates) should be derived. This revised presentation can serve as a basis for future accreditations in the field of calibration of non-automatic weighing instruments, as well as for the presentation of the measurement uncertainty associated with an actual measured value, as specified in calibration certificates.