It should be good enough and better than most springed fish scales.
I also bought a digital luggage scale and it was also confirmed this year by many airport digital scales to the tenth of a pound. coincidentally, I just bought (last night!) a flat, square digital kitchen scale yesterday made by "Polder" from Costco. Weighed all sorts of component stash last night and it confirmed most weights I previously got using the luggage scale but it's so much easier to use.

Chombi