Comment on 2019 redefinition of the SI base unitsparentComments−theandrewbailey7ySince 1959: https://en.wikipedia.org/wiki/International_yard_and_poundThe agreement defined the yard as exactly 0.9144 meters and the pound as exactly 0.45359237 kilograms.
Comments
Since 1959: https://en.wikipedia.org/wiki/International_yard_and_pound