eli5 why are fighters (boxing, mma etc.) still weighed with old balance scales rather than digital?

Question

eli5 why are fighters (boxing, mma etc.) still weighed with old balance scales rather than digital?

In: 4

Answer 1

Balance scales will read the same anywhere in the world. The earth’s gravity varies in different places over a range of more than 0.5% so scales based on springs or electronic force sensors can be off by that amount, unless they’re carefully calibrated at the site they’ll be used. Balance scales would even give the correct reading on the moon or Mars.