At room temperatures, the +32 is significant, at cooking temperatures, who's oven is even accurate to 16/32 degrees? It depends on if knowing the "right" answer is more important than knowing an answer that will get you to what you want e.g., tasty muffins rather than charcoal briquettes :)

Ill say. If I follow GPs life-hack for 30C I get 60F, which is significantly different from 86F. Some life-hack.

This is the correct life hack. is approximate enough to give you an idea. and easy enough to do mentally