3 ms·
A much faster approximation that is not too far off over the range of everyday non-extreme temperatures: C → F: times 2 then plus 30 F → C: minus 30 then divi
by jiananli_ 7y ago
A much faster approximation that is not too far off over the range of everyday non-extreme temperatures:
C → F: times 2 then plus 30
F → C: minus 30 then divide by 2
- thedanbob 7y agoThis is what I use. I'm not quick with arithmetic in my head so if I want anything more accurate it's faster to just grab my phone.
- thisacctforreal 7y agoFWIW iOS Search (swipe down from the middle of the Home screen) can do conversions too. https://i.imgur.com/16AAqDG.png https://i.imgur.com/16AAqDG.png
- bscphil 7y agoBoth of these are in the article, under "crude approximation". The criticism made in the article was that it can be off by ~3 degrees Fahrenheit at normal temperatures.