History of Measurement

The meter was introduced as a universal unit, initially defined as one ten-millionth of the distance from the North Pole to the Equator. This was calculated using trigonometry, and an official meter bar was created in Paris in 1795. The decimal system then allowed for simple calculation of other lengths.

While the meter became an international standard, it was redefined more accurately in 1983. Today, one meter is defined as the distance light travels in a vacuum in a little over 300 millionths of a second.

Historically, lengths were measured using body parts like feet or hands, leading to inconsistencies due to individual variations. For example, the ancient Egyptian cubit, based on forearm length, also varied.

To overcome these variations, Egyptians created a 'Royal Cubit' for standardization. Similarly, in 18th Century France, over 800 different names for measures and 250,000 different units of measurement made trade difficult, highlighting the urgent need for a universal standard.