Boiling Points

Important!
The only actual factor which is truly involved in the variance of boiling water is the pressure. Altitude is given as an alternative when pressure is not available. The boiling point of this calculator begins to lose accuracy at extreme values and also due to rounding.

Boiling Point of Water

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Boiling Point of Water at Various Vacuum Levels

Temperature
(°F)
Temperature
(°C)
Microns Pressure
(inHg vacuum)
Pressure
(psia)
2121007599680.0014.696
20596.115350004.9212.279
194905255269.2310.162
1768035509215.946.866
1587023368020.724.519
1406014935224.042.888
122509245626.281.788
104405511827.751.066
86303175028.670.614
8026.672540028.920.491
7624.442286029.020.442
7222.222032029.120.393
6920.561778029.220.344
6417.781524029.320.295
59151270029.420.246
5311.671016029.520.196
457.22762029.620.147
320457229.740.088
21-6.11254029.820.049
6-14.44127029.870.0245
-24-31.1125429.910.0049
-35-37.2212729.91500.00245
-60-51.1125.4029.91900.00049
-70-56.6712.7029.91950.00024
-90-67.782.5429.91990.00005
----0.0029.92000.000000
  • Boiling point is not valid. Pressure cannot be zero. (i.e., perfect vacuum)
  • Boiling point is not valid. Pressure at the given altitude is non-existent.