Constant evolution of the International System of Units

Celebrate World Metrology Day 2018

It's World Metrology Day on 20 May 2018. This year's theme is 'constant evolution of the International System of Units'.

The theme was chosen because in November 2018, the General Conference on Weights and Measures is expected to agree one of the largest changes to the International System of Units (SI) since its inception.

A number of projects within EURAMET's European Metrology Research Programmes have contributed to this important development.

Learn what is behind the worldwide event and the #SIredefinition >>

Apply now as Referee

EURAMET coordinates two research programmes, both jointly funded by member states and the EU, bringing together world-class measurement expertise in a series of targeted projects.
The collaborative research projects range from measurement for health, environment and energy to fundamental science.

To select projects for future funding, EURAMET relies on the expertise and judgement of independent contributors.

If you are a science or engineering professional, help us select new joint research projects and apply to become a Referee for EURAMET on

News Highlights

Short videos explaining why we need the SI redefinition

Watch this series of video interviews with Joachim Ullrich

In the second episode Prof Joachim Ullrich talks about the seven base units and explains the different ways units are currently defined.

Europe Day celebrates peace and unity in Europe

EURAMET stands for close collaboration in European measurement