• Australien: Division of Telecommunication & Industrial Physics –CSIRO
• Großbritannien: National Physical Laboratory – NPL
• Italien: L'Istituto Nazionale di Ricerca Metrologica (I.N.RI.M)
• Japan: National Institute of Advanced Industrial Science and Technology – AIST
• Kanada: National Research Council – NRC
• Niederlande: Nederlands Meetinstituut – NMi
• Schweiz: Bundesamt für Metrologie und Akkreditierung – METAS
• Südafrika: National Metrology Laboratory – NML
• USA: National Institute of Standards and Technology – NIST 

Further metrological organizations  

• BIPM – Bureau international des Poids et Mesures
• EURAMET e.V. – European Association of National Metrology Institutes
• COOMET – Euro-Asian Cooperation of National Metrological Institutions
• IMEKO – International Measurement Confederation
• NCSL – National Conference of Standards Laboratories
• CERN – European Organization for Nuclear Research
  
  

Standardization  

• DIN – Deutsches Institut für Normung e.V.
• CEN – European Committee for Standardization
• CENELEC – European Committee for Electrotechnical Standardization
• ISO – International Organization for Standardization
• IEC – International Electrotechnical Commission
  
  

Accreditation  

• ILAC – International Laboratory Accreditation Cooperation
• DAR – Deutscher Akkreditierungsrat
• DAkkS – Deutsche Akkreditierungsstelle GmbH
• EA – European co-operation for Accreditation
  
  

Legal metrology  

• OIML – Organisation Internationale de Métrologie Légale
• WELMEC – European Cooperation in Legal Metrology