[nycjay]

Isn't the gram a unit of mass, not weight?

https://en.wikipedia.org/wiki/Gram

[cassianoleal]

You are correct.

At the same time, the way we measure mass is by measuring weight and having the balance approximate a conversion. I imagine most balances use sea level gravity for that but I can't be bothered to do research. :D

[kyriakos]

Makes no difference if cooking on earth though