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NPL and UKRI investment for innovation in time resilience, dissemination and application.
Funding of up to £4.7 million available through joint initiative, call for applications now open.

The measure of all things

Measurement helps us make sense of the world around us

Measurement is the quantitative way of comparing of one thing with another. The International System of Units, also known as the SI, is by far the most widely used system of measurement in the world. It is a coherent system of seven base units (kilogram, metre, second, ampere, kelvin, mole, candela) which allow science, industry and trade to measure all physical objects and phenomena in the same way, using the same units and get the same number.

Originally measurement units were defined by physical objects or properties of materials. An example of this is the metre, which was originally defined by a metal bar exactly one metre in length.

However, these physical representations can change over time or as a result of environmental changes, and are therefore no longer accurate enough for today's research and technological applications.

Get involved

As part of the Measure of All Things campaign, we will be attending events all over the country to tell the story of measurement, the SI units and the importance of the expected redefinition.

Discover how you can get involved:


Come and see us!

We're hosting and attending events up and down the UK, to tell the story of measurement and its impact, and explain what the expected redefinition of the SI units will mean.