Comparison of temperature scales
| Comment | Kelvin K |
Celsius °C |
Fahrenheit °F |
Rankine °Ra (°R) |
Delisle °D ¹ |
Newton °N ¹ |
Réaumur °R (°Ré, °Re) ¹ |
Rømer °Rø (°R) ¹ |
|---|---|---|---|---|---|---|---|---|
Absolute zero |
0 |
−273.15 |
−459.67 |
0 |
559.725 |
−90.14 |
−218.52 |
−135.90 |
Water freezes (at standard pressure) |
273.15 |
0 |
32 |
491.67 |
150 |
0 |
0 |
7.5 |
Average human body temperature ² |
310.0±0.7 |
36.8±0.7 |
98.2±1.3 |
557.9±1.3 |
94.8±1.1 |
12.1±0.2 |
29.4±0.6 |
26.8±0.4 |
Water boils (at standard pressure) |
373.1339 |
99.9839 |
211.97102 |
671.64102 |
0 |
33 |
80 |
60 |
Titanium melts |
1941 |
1668 |
3034 |
3494 |
−2352 |
550 |
1334 |
883 |
Surface of the Sun |
5800 |
5526 |
9980 |
10440 |
−8140 |
1823 |
4421 |
2909 |
² Normal human body temperature is 36.8 ±0.7 °C, or 98.2 ±1.3 °F. The commonly given value 98.6 °F is simply the exact conversion of the nineteenth-century German standard of 37 °C. Since it does not list an acceptable range, it could therefore be said to have excess (invalid) precision. See Temperature of a Healthy Human (Body Temperature) for more information.
Some numbers in this table have been rounded off.
