Editing International System of Units (section)

=== Metric units not recognised by SI ===

{{Main|List of metric units}}
Although the term ''metric system'' is often used as an informal alternative name for the International System of Units,<ref name="MetricSystemAsNameForSI">{{cite journal |last=Olthoff|first=Jim|url=https://www.nist.gov/blogs/taking-measure/all-times-all-peoples-how-replacing-kilogram-empowers-industry |title=For All Times, For All Peoples: How Replacing the Kilogram Empowers Industry |journal=[[NIST]] | date=2018 |access-date=14 April 2020 |archive-url=https://web.archive.org/web/20200316195625/https://www.nist.gov/blogs/taking-measure/all-times-all-peoples-how-replacing-kilogram-empowers-industry |archive-date=16 March 2020 |url-status=live |quote=... the International System of Units (SI), popularly known as the metric system.}}</ref> other metric systems exist, some of which were in widespread use in the past or are even still used in particular areas. There are also individual [[metric units]] such as the [[sverdrup]] and the [[darcy (unit)|darcy]] that exist outside of any system of units. Most of the units of the other metric systems are not recognised by the SI.