This year, we celebrate the 150th anniversary of the signing of the Metre Convention - a milestone that underscores a century and a half of international collaboration in measurement science. The official recognition of World Metrology Day as a UNESCO International Day represents an extraordinary opportunity to promote the pivotal role of metrology in building a sustainable future [Learn more].

The World Metrology Day Poster

At the heart of this year’s celebrations is the official 2025 World Metrology Day poster.

Topic: Measurements for all times, for all people.

How to use the Poster

We invite stakeholders - including national metrology institutes, academic institutions, industry partners and policymakers - to use this Poster in your outreach efforts. It can be displayed at events, shared online, and used as an educational tool to:

• Promote the importance of metrology within specific sectors.
• Inspire discussions about the role of accurate measurements in achieving sustainability goals.
• Enhance awareness of the Metre Convention's historical and future impact.