<P> Fuel is nowadays measured in metric units . The Gimli Glider incident in July 1983 is a famous case of a kilogram - pound mistake, in which the miscalculation of the amount of fuel in an Air Canada airplane with a malfunctioning fuel gauge caused the plane to run out of fuel mid-flight . </P> <P> In 2005, the Ontario government announced changes to the secondary - school mathematics curriculum that would allow imperial units to be taught along with metric units . This marked a departure from previous governments' efforts to make sure that the curriculum used only the metric system . This was done in light of the refusal or reluctance of much of the private sector to metricate; thus students had been leaving school unprepared for the units used in the workplace . Many other provinces and territories also include the imperial system of measurements as part of their educational curriculum . </P>

When did canada switch to the metric system