It is well known that the USA uses miles, feet and inches and they are identical to the English versions of these units used in the UK. What is a lot less well known is the fact that the USA had two official feet, the international foot and the survey foot. By extension, there were also two versions of derived units based on these two feet. So there were survey and international versions of common units such as the mile, yard and inch. The US survey foot was deprecated at the end of last year. This deprecation act shows the importance of ensuring uniformity and common standards in measurement matters.Continue reading “Retirement of the US survey foot”
The International Bureau of Weights and Measures (BIPM) has formally approved the use of four new SI prefixes to meet the growing needs of science, computing and the increasing amount of online data and to prevent the adoption of unofficial prefix names. The approval of the new prefixes was one of the resolutions of the 27th General Conference on Weights and Measures, which took place on 15-18 November 2022.Continue reading “First new SI prefixes for over 30 years”
The Government consultation into the choice of units of measure in the retail sector [ref 1] has been bedevilled by inaccuracies, bias, bodges and probably computer blunders. The Foreword of the document (unsigned) is not only riddled with inaccuracies and half-truths, but the explanation of the law relating to units of measure in the retail trade bypasses the fundamental principles behind the display of prices.Continue reading “Government Imperial Units consultation bedevilled by inaccuracy, bias, bodges and computer blunders”
Here is a simple method to find the litre capacity of household items you want to replace when you have lost all sources of information about their capacity. This method demonstrates a clear and simple relationship between centimetres and litres.Continue reading “Household items and litre measurements”
Metric Views marks the opening to the general public of London’s Elizabeth line, formerly known as Crossrail, with a few statistics.Continue reading “Elizabeth Line in figures”
After celebrating the arrival of decimal currency in the UK 50 years ago, Metric Views now goes back to basics on decimal measurement. No, we shall not be looking at nautical distances or Gunter’s chain! Continue reading “How metric units fit together”
SI is capable of measuring anything from the tiniest particles to the largest objects in the universe. While it may sound technical and scientific, there are practical benefits of tiny measurements in some everyday products. Here, Ronnie Cohen takes a look.Continue reading “Micro metric measurements in everyday products”
Following our article on the new definition of the kilogram, Martin Vlietstra, one of our occasional contributors, provides some insight into how, in the 21st century, this standard is passed down to us, the general public.