Page "Imperial units" Paragraph 2

The system of imperial units or the imperial system ( also known as British Imperial ) is the system of units first defined in the British Weights and Measures Act of 1824, which was later refined and reduced.

The system came into official use across the British Empire.

By the late 20th century, most nations of the former empire had officially adopted the metric system as their main system of measurement, although as of 2011 the United Kingdom had only partially adopted it.