Skip to Main Content
  • Sign in

  • Metrology areas

  • Quick links

  • français

Coordinating the world-wide measurement system to ensure comparable and internationally accepted measurement results

  • français
  • français
Home
  • About us

    About us

    Benefits of participation
    Benefits of participation
    • Page Benefits of participation
    • Member States
    • Associates
    • How to join us
    Governance
    Governance
    • Page Governance
    • CIPM
    • CGPM
    • Founding documents
    • Strategy
    Our Mission and Objectives
    Our Mission and Objectives
    • Page Our Mission and Objectives
    • Our work programme
    • Knowledge transfer (CBKT)
    • Staff of the BIPM Headquarters
    • Jobs and opportunities
    • How to get to the BIPM
    Historical information
    Historical information
    • Page Historical information
    • Evolution of the SI
    • Metre Convention
    • Pavillon de Breteuil
  • CGPM (2026)
  • Coordination

    Coordination

    CIPM MRA
    CIPM MRA
    • Page CIPM MRA
    • Participating laboratories
    • Use of the CIPM MRA logo
    • Documents on the CIPM MRA
    • CIPM MRA Comparison reports
    • CMC approval process
    • JCRB
    • KCDB >>
    • Help on the KCDB
    CIPM Forums
    CIPM Forums
    • Page CIPM Forums
    • Metrology and Digitalization
    CIPM Consultative Committees
    CIPM Consultative Committees
    • Page CIPM Consultative Committees
    • CCAUV
    • CCEM
    • CCL
    • CCM
    • CCPR
    • CCQM
    • CCRI
    • CCT
    • CCTF
    • CCU
    Capacity Building and Knowledge transfer: CBKT
    Guides in Metrology Committee: JCGM
    Guides in Metrology Committee: JCGM
    • Page Guides in Metrology Committee: JCGM
    • JCGM-WG1 (GUM)
    • JCGM-WG2 (VIM)
    International reference time scales
    International reference time scales
    • Page International reference time scales
    • Time FTP Server
    • Time Department Database
    Laboratory medicine: JCTLM
    Laboratory medicine: JCTLM
    • Page Laboratory medicine: JCTLM
    • JCTLM Database >>
    • JCTLM portal >>
  • Liaison

    Liaison

    Institutional liaisons
    Institutional liaisons
    • Page Institutional liaisons
    • Alphabetical list
    • Formal agreements
    • Digital transformation
    • Quality infrastructure
    • Technical liaisons
    CODATA-TGFC
    Joint Committees
    Joint Committees
    • Page Joint Committees
    • Guides in Metrology Committee: JCGM
    • Laboratory medicine: JCTLM
    • CIPM MRA: JCRB
    NMI Directors and Member State Representatives
    Regional metrology organizations
    Regional metrology organizations
    • Page Regional metrology organizations
    • AFRIMETS
    • APMP
    • COOMET
    • EURAMET
    • GULFMET
    • SIM
    • Toolbox
  • Technical/Scientific

    Technical/Scientific

    The SI
    The SI
    • Page The SI
    • Defining constants
    • SI base units
    • SI prefixes
    • Practical realizations
    • SI Brochure
    • SI promotion
    • Redefinition of the second
    Technical areas of the BIPM
    Technical areas of the BIPM