Metrication

In trigonometry, the gradianalso known as the gon (), grad, or gradeis a unit of measurement of an angle, defined as one-hundredth of the right angle; in other words, 100 gradians is equal to 90 degrees. It is equivalent to of a turn, of a degree, or of a radian. Measuring angles in gradians (gons) is said to employ the centesimal system of angular measurement, initiated as part of metrication and decimalisation efforts.

1875 international treaty

comparison of various scales

international standard for paper sizes, including A4

time of day in decimal units

thumb|upright=1.35|World map, colour-coded to show the years the countries started the process of official conversion to the metric system. Using data from PhD thesis by Hector Vera and NIST. Metrication or metrification is the act or process of converting to the metric system of measurement. All over the world, countries have transitioned from local and traditional units of measurement to the metric system. This process began in France during the 1790s, and has persistently advanced over two centuries, accumulating into 95% of the world officially exclusively using the modern metric system. N

ancient Chinese time unit, 12 double-hour periods

international standard for sizes of raw, untrimmed paper

Joint European standard for clothing sizes

history of the metric system measurement standards