Weight calibration

We offer UKAS weight calibration and recalibration at our dedicated environmentally controlled mass metrology lab in Oxford. We can calibrate/recalibrate class E2/F1/F2/M1 scale, test or calibration weights. We also have new weights for sale as well.


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  • Weight Calibration Scope
  • Weight Calibration Key Features
  • Certification
  • Service

Weight Calibration Scope

UKAS (ISO17025) calibration of weights and mass:

  • Class E2 weights: 1mg – 1kg
  • Class F1 weights: 1mg – 10kg
  • Class F2 weights: 1mg – 20kg
  • Class M1 weights & below: 1mg – 25kg

For weights outside this range please contact us.

Weight Calibration Key Features

Using the latest mass comparators from Sartorius and Mettler Toledo in our environmentally controlled metrology laboratory we can issue UKAS certificates of calibration for mass.

  • UKAS accredited systems and procedures controlling the whole calibration process.
  • Traceability chains of reference standards used verified back to the International Kilogram.
  • Good quality calibrations that express an uncertainty of measurement.
  • Independently audited by UKAS on our competence to perform mass calibration.


  • If accurate measurements are an important part of your weighing process.
  • You need to minimise product failure / quality issues.
  • Comply with regulatory requirements and stand up to the scrutiny of external auditors.


UKAS Weight Calibration

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