why did the french academy of science create the metric system?

Answer 1

The Metric System
Designed during the French Revolution of the 1790's, the metric system brought order out of the conflicting and confusing traditional systems of weights and measures then being used in Europe. Prior to the introduction of the metric system, it was common for units of length, land area, and weight to vary, not just from one country to another but from one region to another within the same country. As the modern nations were gradually assembled from smaller kingdoms and principalities, confusion simply multiplied. Merchants, scientists, and educated people throughout Europe realized that a uniform system was needed, but it was only in the climate of a complete political upheaval that such a radical change could actually be considered.

Answer 2

because back in the day there was no standard system so if you wanted to go to a different country and sell your stuff you would have to work in different units. this led to some angry faces wanting a better system so the metric system came along and made things nice and simple