Dew point, ppm, absolute humidity conversion formula and common conversion value
2023-01-19 09:30:00
Conversion of dew point to ppm is calculated as follows:
P/1013 × one hundred and four
The dew point is converted to g/m3 (20 ℃, 101.3Kpa) and calculated as follows:
P/101.3*18.01/22.41*273.1/293.1
Where: P - saturated vapor pressure of ice at dew temperature, Pa.
| the dew point | PPm | Absolute humidity | the dew point | PPm | Absolute humidity | the dew point | PPm | Absolute humidity |
| 0 | 6033 | 4.517 | -42 | 100.9 | 0.07555 | -84 | 0.2764 | 0.0002070 |
| -2 | 5111 | 3.827 | -44 | 80.03 | 0.05993 | -86 | 0.1955 | 0.0001464 |
| -4 | 4318 | 3.233 | -46 | 63.19 | 0.04732 | -88 | 0.1372 | 0.0001028 |
| -6 | 3640 | 2.725 | -48 | 49.67 | 0.03720 | -90 | 0.09564 | 0.00007161 |
| -8 | 3060 | 2.292 | -50 | 38.89 | 0.02912 | -92 | 0.06611 | 0.00004950 |
| -10 | 2566 | 1.921 | -52 | 30.32 | 0.02270 | -94 | 0.0452 | 0.00003394 |
| -12 | 2145 | 1.606 | -54 | 23.51 | 0.01761 | -96 | 0.03087 | 0.00002308 |
| -14 | 1789 | 1.339 | -56 | 18.16 | 0.01360 | -98 | 0.02077 | 0.00001555 |
| -16 | 1487 | 1.113 | -58 | 13.96 | 0.01045 | -100 | 0.01387 | 0.00001039 |
| -18 | 1233 | 0.9233 | -60 | 10.68 | 0.007998 | |||
| -20 | 1019 | 0.7629 | -62 | 8.128 | 0.006087 | |||
| -22 | 840 | 0.6291 | -64 | 6.154 | 0.004608 | |||
| -24 | 690.2 | 0.5169 | -66 | 4.635 | 0.003471 | |||
| -26 | 565.3 | 0.4233 | -68 | 3.471 | 0.002599 | |||
| -28 | 461.3 | 0.3454 | -70 | 2.584 | 0.001935 | |||
| -30 | 375.3 | 0.2810 | -72 | 1.914 | 0.001433 | |||
| -32 | 304.1 | 0.2278 | -74 | 1.409 | 0.001055 | |||
| -34 | 245.8 | 0.1841 | -76 | 1.031 | 0.0007717 | |||
| -36 | 197.8 | 0.1481 | -78 | 0.7492 | 0.0005610 | |||
| -38 | 158.7 | 0.1189 | -80 | 0.5410 | 0.0004051 | |||
| -40 | 126.8 | 0.09491 | -82 | 0.3881 | 0.0002906 |
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