National Standards Authority of Ireland Standards Shop

Buy Irish Standards Online

Skip to content

World Metrology Day

May 20th is World Metrology Day, commemorating the anniversary of the signing of the Metre Convention in 1875. This treaty provides the basis for a coherent measurement system worldwide.

The theme chosen for 2013 is Measurements in daily life. In the course of a typical day it is surprising how often measurements come into play, whether (among many possible examples) checking the time, purchasing food or produce, filling up a vehicle with fuel, or undergoing a blood pressure check.

These, and countless other activities in daily life, require measurements of one sort or another. Yet accurate measurements are taken for granted nowadays. Not surprisingly, most people are unaware that in the background there is a worldwide community specializing in metrology, the science of measurements, making sure it all works. Everybody depends on this community doing its job, and doing it well.

Across the world, national metrology institutes continually advance measurement science by developing and validating new measurement techniques at whatever level of sophistication is needed. They also participate in comparisons coordinated by the Bureau International des Poids et Mesures (BIPM) to ensure the reliability of measurement results worldwide.


    Many measuring instruments are controlled by law or are subject to regulatory control, for example the scales used to weigh goods in a shop, instruments to measure environmental pollution, or meters used to bill energy. The International Organization of Legal Metrology (OIML) develops international Recommendations, the aim of which is to align and harmonize requirements for these types of instruments worldwide.

World Metrology Day recognizes and celebrates the contribution of all the people that work in intergovernmental and national organizations throughout the year on behalf of all.


For futher information visit