The Quickest way I've found converting ℃ to ℉ without doing fractions or decimals is to round off to the nearest 10th (i.e.10℃,20℃,30℃.....) just remember 0℃ is 32℉ and there is 18℉ difference between every 10℃ and 9℉ between every 5℃. If you need a more accurate reading just add or subtract 1.8. Examples:
10℃=50℉ 15℃=59℉ 11℃=51.8℉ 12℃=53.6℉.....
20℃=68℉ 25℃=77℉ 21℃=69.8℉ 22℃=71.6℉.....
30℃=86℉ 35℃=95℉ 31℃=87.8℉ .......
40℃=104℉ 45℃=113℉ .....
50℃=122℉ 55℃=131℉......
60℃=140℉ 65℃=149℉.....
70℃=158℉ 75℃=167℉.....
80℃=176℉ 85℃=185℉.....
90℃=194℉ 95℃=203℉....
100℃=212℉ 105℃=221℉
The Quickest way I've found converting ℃ to ℉ without doing fractions or decimals is to round off to the nearest 10th (i.e.10℃,20℃,30℃.....) just remember 0℃ is 32℉ and there is 18℉ difference between every 10℃ and 9℉ between every 5℃. If you need a more accurate reading just add or subtract 1.8. Examples:
10℃=50℉ 15℃=59℉ 11℃=51.8℉ 12℃=53.6℉.....
20℃=68℉ 25℃=77℉ 21℃=69.8℉ 22℃=71.6℉.....
30℃=86℉ 35℃=95℉ 31℃=87.8℉ .......
40℃=104℉ 45℃=113℉ .....
50℃=122℉ 55℃=131℉......
60℃=140℉ 65℃=149℉.....
70℃=158℉ 75℃=167℉.....
80℃=176℉ 85℃=185℉.....
90℃=194℉ 95℃=203℉....
100℃=212℉ 105℃=221℉