Negative exponents do look odd. I first saw it in RollerCoaster Tycoon like 25 years ago. Units with negative exponents are non-existent in everyday discourse

Negative exponents do look odd. I first saw it in RollerCoaster Tycoon like 25 years ago. Units with negative exponents are non-existent in everyday discourse (articles for the general public, product labels, commercial catalogs, etc.) and even the vast majority of engineering. It's when you get into science and analysis where you start seeing big compound units and negative exponents. Here are a few examples: https://en.wikipedia.org/wiki/Viscosity#Units https://en.wikipedia.org/wiki/Viscosity#Units , https://en.wikipedia.org/wiki/Gravitational_constant https://en.wikipedia.org/wiki/Gravitational_constant , https://en.wikipedia.org/wiki/Vacuum_permittivity https://en.wikipedia.org/wiki/Vacuum_permittivity , https://en.wikipedia.org/wiki/Dimensional_analysis https://en.wikipedia.org/wiki/Dimensional_analysis