Hygrometric Equivalents

Dewpoint Dewpoint Vapor Pressure ppm by volume
Degrees C Degrees F mm Hg
-150 -238 7 x 10e-15 9.2 x 10e-12
-140 -220 3 x 10e-10 3.9 x 10e-7
-130 -202 7 x 10 e-9 9.2 x 10e-6
-120 -184 9 x 10e-8 1.2 x 10e-4
-118 -180 0.00000015 0.00020
-116 -177 0.00000025 0.00033
-114 -173 0.00000041 0.00054
-112 -170 0.00000066 0.00087
-110 -166 0.00000107 0.00141
-108 -162 0.00000169 0.00222
-106 -159 0.00000266 0.00350
-104 -155 0.00000413 0.00543
-102 -152 0.00000636 0.00837
-100 -148 0.00000968 0.0127
-98 -144 0.00001459 0.0192
-96 -141 0.00002178 0.0287
-94 -137 0.00003224 0.0424
-92 -134 0.00004729 0.0622
-90 -130 0.00006879 0.0905
-88 -126 0.00009924 0.1305
-86 -123 0.00014205 0.1869
-84 -119 0.0002018 0.2655
-82 -116 0.0002844 0.3742
-80 -112 0.0003981 0.5238
-78 -108 0.0005533 0.7280
-76 -105 0.0007638 1.005
-74 -101 0.0010476 1.378
-72 -98 0.0014275 1.878
-70 -94 0.001933 2.543
-68 -80 0.002603 3.425
-66 -87 0.003483 4.583
-64 -83 0.004635 6.099
-62 -80 0.006135 8.072
-60 -76 0.008076 10.626
-58 -72 0.010576 13.916
-56 -69 0.013780 18.132
-54 -65 0.01787 23.513
-52 -62 0.02305 30.329
-50 -58 0.02961 38.961
-48 -54 0.03786 49.816
-46 -51 0.04819 63.408
-44 -47 0.06108 80.368
-42 -44 0.77090 101.43
-40 -40 0.09691 127.51
-38 -36 0.12133 159.64
-36 -33 0.15133 199.12
-34 -29 0.1880 247.37
-32 -26 0.2328 306.32
-30 -22 0.2871 377.76
-28 -18 0.3529 464.34
-26 -15 0.4323 568.82
-24 -11 0.5277 694.34
-22 -8 0.6422 845.00
-20 -4 0.7790 1025.00
-18 0 0.9421 1239.61
-16 +3 1.136 1494.74
-14 +7 1.365 1796.05
-12 +10 1.636 2152.63
-10 +14 1.956 2573.68
-8 +18 2.331 3067.11
-6 +21 2.771 3646.05
-4 +25 3.285 4322.37
-2 +28 3.884 5110.53
0 +32 4.581 6027.63
+2 +36 5.292 6963.16
+4 +39 6.099 8025.00
+6 +43 7.012 9226.32
+8 +46 8.045 10585.53
+10 +50 9.209 12117.10
+12 +54 10.518 13839.47
+14 +57 11.988 15773.68
+16 +61 13.635 17940.79
+18 +64 15.478 20365.79
+20 +68 17.535 23072.37
 

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