Foot (unit)

=== Imperial units ===
In [[Imperial units]], the foot was defined as {{sfrac|1|3}}&nbsp;yard, with the yard being realized as a physical standard (separate from the standard meter). The yard standards of the different [[Commonwealth of Nations|Commonwealth]] countries were periodically compared with one another.<ref>See, for example, ''Report on the Comparisons of the Parliamentary Copies of the Imperial Standards with the Imperial Standard Yard and the Imperial Standard Pound and with each other during the Years 1947 to 1948'' (H.M.S.O., London, 1950). ''Report on the Comparisons of the Parliamentary Copies of the Imperial Standards with each other during the Year 1957'' (H.M.S.O., London, 1958).</ref> The value of the United Kingdom primary standard of the yard was determined in terms of the meter by the [[National Physical Laboratory (United Kingdom)|National Physical Laboratory]] in 1964 to be {{val|0.9143969|u=m}},<ref>{{cite journal |author1=Bigg, P. H. |author2=Anderton, Pamela |date=March 1964 |title=The United Kingdom standards of the yard in terms of the meter |url=http://www.iop.org/EJ/abstract/0508-3443/15/3/308/ |url-status=dead |journal=British Journal of Applied Physics |volume=15 |issue=3 |pages=291–300 |doi=10.1088/0508-3443/15/3/308 |bibcode=1964BJAP...15..291B |archive-url=https://archive.today/20120803014104/http://iopscience.iop.org/0508-3443/15/3/308 |archive-date=August 3, 2012 |access-date=May 16, 2009 }}</ref> implying a pre-1959 UK foot of {{val|0.3047990|u=m}}.

The UK adopted the international yard for all purposes through the [[Weights and Measures Act 1963]], effective January 1, 1964.<ref>[http://www.bailii.org/ew/cases/EWHC/Admin/2002/195.html Thoburn v Sunderland City Council &#91;2002&#93; EWHC 195 (Admin) (18 February 2002)]</ref>