Put the thermo in boiling water and see if it reads 212 F. Your boiling point may differ depending on altitude. See chart below for the pressure in your neighborhood.
[size=-1]To calculate the boiling point of water at a location on any specific day use the following equation:[/size]
[size=-1]Boiling point of water = Boiling point at specified altitude (Table 1) ± boiling point barometric correction (Table 2).[/size]
[size=-1]In the tables, the following equations have been used:[/size]
[size=-1]Pressure (in. Hg) = 29.921* (1-6.8753*0.000001 * altitude, ft.)^5.2559[/size]
[size=-1]Boiling point = 49.161 * Ln (in. Hg) + 44.932[/size]
[size=-1]TABLE[/size] [size=-1] 1[/size] | [size=-2]Changes in Standard Temperature and Pressure (in Hg) as a Function of Altitude[/size] | [size=-1] (Ref. 1)[/size] | | [size=-1]TABLE[/size] [size=-1] 2[/size] | [size=-2]Boiling Point as a Function of [/size] [size=-2]Barometric Pressure[/size] | [size=-1] (Ref. 2)[/size] |
[size=-1]Altitude (ft.)[/size] | [size=-1]Pressure[/size] [size=-1](in. Hg)[/size] | [size=-1]Boiling pt.[/size] [size=-1](° F)[/size] | [size=-1] [/size] | [size=-1]Pressure[/size] [size=-1](in. Hg)[/size] | [size=-1]Boiling pt. [/size] [size=-1](° F)[/size] | [size=-1]Boiling pt.[/size] [size=-1][added or reduced][/size] [size=-1](° F)[/size] |
[size=-1]-500[/size] | [size=-1]30.466[/size] | [size=-1]212.9[/size] | | [size=-1]27.6[/size] | [size=-1]208.04[/size] | [size=-1]-3.96[/size] |
[size=-1]0[/size] | [size=-1]29.921[/size] | [size=-1]212.0[/size] | | [size=-1]27.8[/size] | [size=-1]208.39[/size] | [size=-1]-3.61[/size] |
[size=-1]500[/size] | [size=-1]29.384[/size] | [size=-1]211.1[/size] | | [size=-1]28.0[/size] | [size=-1]208.75[/size] | [size=-1]-3.25[/size] |
[size=-1]1000[/size] | [size=-1]28.855[/size] | [size=-1]210.2[/size] | | [size=-1]28.2[/size] | [size=-1]209.10[/size] | [size=-1]-2.90[/size] |
[size=-1]2000[/size] | [size=-1]27.821[/size] | [size=-1]208.4[/size] | | [size=-1]28.4[/size] | [size=-1]209.44[/size] | [size=-1]-2.56[/size] |
[size=-1]2500[/size] | [size=-1]27.315[/size] | [size=-1]207.5[/size] | | [size=-1]28.6[/size] | [size=-1]209.79[/size] | [size=-1]-2.21[/size] |
[size=-1]3000[/size] | [size=-1]26.817[/size] | [size=-1]206.6[/size] | | [size=-1]28.8[/size] | [size=-1]210.13[/size] | [size=-1]-1.87[/size] |
[size=-1]3500[/size] | [size=-1]26.326[/size] | [size=-1]205.7[/size] | | [size=-1]29.0[/size] | [size=-1]210.47[/size] | [size=-1]-1.53[/size] |
[size=-1]4000[/size] | [size=-1]25.842[/size] | [size=-1]204.8[/size] | | [size=-1]29.2[/size] | [size=-1]210.81[/size] | [size=-1]-1.19[/size] |
[size=-1]4500[/size] | [size=-1]25.365[/size] | [size=-1]203.9[/size] | | [size=-1]29.4[/size] | [size=-1]211.15[/size] | [size=-1]-0.85[/size] |
[size=-1]5000[/size] | [size=-1]24.896[/size] | [size=-1]203.0[/size] | | [size=-1]29.6[/size] | [size=-1]211.48[/size] | [size=-1]-0.52[/size] |
[size=-1]5500[/size] | [size=-1]24.434[/size] | [size=-1]202.0[/size] | | [size=-1]29.8[/size] | [size=-1]211.81[/size] | [size=-1]-0.19[/size] |
[size=-1]6000[/size] | [size=-1]23.978[/size] | [size=-1]201.1[/size] | | [size=-1]29.921[/size] | [size=-1]212.00[/size] | [size=-1]0.00[/size] |
[size=-1]6500[/size] | [size=-1]23.530[/size] | [size=-1]200.2[/size] | | [size=-1]30.0[/size] | [size=-1]212.14[/size] | [size=-1]0.14[/size] |
[size=-1]7000[/size] | [size=-1]23.088[/size] | [size=-1]199.3[/size] | | [size=-1]30.2[/size] | [size=-1]212.46[/size] | [size=-1]0.46[/size] |
[size=-1]7500[/size] | [size=-1]22.653[/size] | [size=-1]198.3[/size] | | [size=-1]30.4[/size] | [size=-1]212.79[/size] | [size=-1]0.79[/size] |
[size=-1]8000[/size] | [size=-1]22.225[/size] | [size=-1]197.4[/size] | | [size=-1]30.6[/size] | [size=-1]213.11[/size] | [size=-1]1.11[/size] |
[size=-1]8500[/size] | [size=-1]21.803[/size] | [size=-1]196.4[/size] | | [size=-1]30.8[/size] | [size=-1]213.43[/size] | [size=-1]1.43[/size] |
[size=-1]9000[/size] | [size=-1]21.388[/size] | [size=-1]195.5[/size] | | [size=-1]31.0[/size] | [size=-1]213.75[/size] | [size=-1]1.75[/size] |
[size=-1]9500[/size] | [size=-1]20.979[/size] | [size=-1]194.6[/size] | | [size=-1]31.2[/size] | [size=-1]214.07[/size] | [size=-1]2.07[/size] |
[size=-1]10000[/size] | [size=-1]20.577[/size] | [size=-1]193.6[/size] | | [size=-1]31.4[/size] | [size=-1]214.38[/size] | [size=-1]2.38[/size] |