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Fahrenheit and Celsius (Centigrade) Scales

Below is information about the Celsius and Fahrenheit Scales, including the degrees for boiling and freezing, absolute zero, and the related Kelvin Scale.

°Celsius°Fahrenheit
–273.15–459.67
–250–418
–200–328
–150–238
–100–148
–50–58
–40–40
–30–22
–20–4
–1014
032
541
1050
1559
2068
2577
3086
3595
40104
45113
50122
55131
60140
65149
70158
75167
80176
85185
90194
95203
100212

Zero on the Fahrenheit scale represents the temperature produced by the mixing of equal weights of snow and common salt.

°Fahrenheit°Celsius
Boiling point of water 212° 100°
Freezing point of water 32°
Absolute zero–459.6°–273.1°

Absolute zero is theoretically the lowest possible temperature, the point at which all molecular motion would cease.

To convert Fahrenheit to Celsius (Centigrade), subtract 32 and divide by 1.8.

To convert Celsius (Centigrade) to Fahrenheit, multiply by 1.8 and add 32.

Kelvin Scale

Degrees Celsius (°C) and kelvins (K) have the same magnitude. The only difference between the scales is their starting points: 0 K is "absolute zero," while 0°C is the freezing point of water. One can convert degrees Celsius to kelvins by adding 273.15; thus, the boiling point of water, 100°C, is 373.15 K.

Measurement