Degrees Fahrenheit F to Celsius C (Centigrade) and to kelvin K, Rankine and Réaumur R
Enter the known temperature on the appropriate line.
The other boxes will show the conversions.
You don't need a "Calculate" bar.
Fahrenheit
Celsius
Feels
40s
5 - 10
chilly
50s
10 - 15
cool
60s
15 - 21
mild
70s
21 - 26
comfortable
80s
26 - 32
warm
90s
32 - 37
really hot
The degree centigrade (°C) was officially renamed Celsius in 1948 to avoid confusion
with the angular measure known as the centigrade (one hundredth of a grade).
