国际度量衡大会（法语：Conférence générale des poids et mesures，简称CGPM）是依1875年订定的米制公约为维护国际单位制（SI制）所设立的3个组织中的1个。另外2个组织是国际度量衡局（BIPM）及国际度量衡委员会（CIPM）。

国际度量衡大会有52个会员国及组织会员，是国际度量衡局的最高权力机构，每4到6年会在法国塞夫勒展开会议。

The General Conference on Weights and Measures (French:Conférence générale des poids et mesures - CGPM) is the senior of the three Inter-governmental organizations established in 1875 under the terms of the Metre Convention (French:Convention du Mètre) to represent the interests of member states. The treaty, which also set up two further bodies, the International Committee for Weights and Measures (French:Comité international des poids et mesures- CIPM) and the International Bureau of Weights and Measures (French:Bureau international des poids et mesures - BIPM), was drawn up to coordinate international metrology and to coordinate the development of the metric system.