| Barometric Pressure vs. Altitude Table | |||||||||
| Altitude Above Sea Level | Temperature | Barometer | Atmospheric Pressure | ||||||
| Feet | Miles | Meters | F | C | In. Hg. Abs. | mm Hg. Abs. | PSI | Kg / sq. cm | kPa |
| -5000 | -1526 | 77 | 25 | 35.58 | 903.7 | 17.48 | 1.229 | 120.5 | |
| -4500 | -1373 | 75 | 24 | 35.00 | 889.0 | 17.19 | 1.209 | 118.5 | |
| -4000 | -1220 | 73 | 23 | 34.42 | 874.3 | 16.9 | 1.188 | 116.5 | |
| -3500 | -1068 | 71 | 22 | 33.84 | 859.5 | 16.62 | 1.169 | 114.6 | |
| -3000 | -915 | 70 | 21 | 33.27 | 845.1 | 16.34 | 1.149 | 112.7 | |
| -2500 | -763 | 68 | 20 | 32.70 | 830.6 | 16.06 | 1.129 | 110.7 | |
| -2000 | -610 | 66 | 19 | 32.14 | 816.4 | 15.78 | 1.109 | 108.8 | |
| -1500 | -458 | 64 | 18 | 31.58 | 802.1 | 15.51 | 1.091 | 106.9 | |
| -1000 | -305 | 63 | 17 | 31.02 | 787.9 | 15.23 | 1.071 | 105.0 | |
| -500 | -153 | 61 | 16 | 30.47 | 773.9 | 14.96 | 1.052 | 103.1 | |
| 0 | 0 | 59 | 15 | 29.92 | 760.0 | 14.696 | 1.0333 | 101.33 | |
| 500 | 153 | 57 | 14 | 29.38 | 746.3 | 14.43 | 1.015 | 99.49 | |
| 1000 | 305 | 55 | 13 | 28.86 | 733.0 | 14.16 | 0.996 | 97.63 | |
| 1500 | 458 | 54 | 12 | 28.33 | 719.6 | 13.91 | 0.978 | 95.91 | |
| 2000 | 610 | 52 | 11 | 27.82 | 706.6 | 13.66 | 0.960 | 94.19 | |
| 2500 | 763 | 50 | 10 | 27.32 | 693.9 | 13.41 | 0.943 | 92.46 | |
| 3000 | 915 | 48 | 9 | 26.82 | 681.2 | 13.17 | 0.926 | 90.81 | |
| 3500 | 1068 | 47 | 8 | 26.33 | 668.8 | 12.93 | 0.909 | 89.15 | |
| 4000 | 1220 | 45 | 7 | 25.84 | 656.3 | 12.69 | 0.892 | 87.49 | |
| 4500 | 1373 | 43 | 6 | 25.37 | 644.4 | 12.46 | 0.876 | 85.91 | |
| 5000 | 0.95 | 1526 | 41 | 5 | 24.90 | 632.5 | 12.23 | 0.86 | 84.33 |
| 6000 | 1.1 | 1831 | 38 | 3 | 23.99 | 609.3 | 11.78 | 0.828 | 81.22 |
| 7000 | 1.3 | 2136 | 34 | 1 | 23.10 | 586.7 | 11.34 | 0.797 | 78.19 |
| 8000 | 1.5 | 2441 | 31 | -1 | 22.23 | 564.6 | 10.91 | 0.767 | 75.22 |
| 9000 | 1.7 | 2746 | 27 | -3 | 21.39 | 543.3 | 10.5 | 0.738 | 72.40 |
| 10,000 | 1.9 | 3050 | 23 | -5 | 20.58 | 522.7 | 10.1 | 0.71 | 69.64 |
| 15,000 | 2.8 | 4577 | 6 | -14 | 16.89 | 429.0 | 8.29 | 0.583 | 57.16 |
| 20,000 | 3.8 | 6102 | -12 | -24 | 13.76 | 349.5 | 6.76 | 0.475 | 46.61 |
| 25,000 | 4.7 | 7628 | -30 | -34 | 11.12 | 282.4 | 5.46 | 0.384 | 37.65 |
| 30,000 | 5.7 | 9153 | -48 | -44 | 8.903 | 226.1 | 4.37 | 0.307 | 30.13 |
| 35,000 | 6.6 | 10,679 | -66 | -54 | 7.06 | 179.3 | 3.47 | 0.244 | 23.93 |
| 40,000 | 7.6 | 12,204 | -70 | -57 | 5.558 | 141.2 | 2.73 | 0.192 | 18.82 |
| 45,000 | 8.5 | 13,730 | -70 | -57 | 4.375 | 111.1 | 2.15 | 0.151 | 14.82 |
| 50,000 | 9.5 | 15,255 | -70 | -57 | 3.444 | 87.5 | 1.69 | 0.119 | 11.65 |
| 55,000 | 10.4 | 16,781 | -70 | -57 | 2.712 | 68.9 | 1.33 | 0.0935 | 9.17 |
| 60,000 | 11.4 | 18,306 | -70 | -57 | 2.135 | 54.2 | 1.05 | 0.0738 | 7.24 |
| 70,000 | 13.3 | 21,357 | -67 | -55 | 1.325 | 33.7 | 0.651 | 0.651 | 4.49 |
| 80,000 | 15.2 | 24,408 | -62 | -52 | 0.8273 | 21.0 | 0.406 | 0.406 | 2.80 |
| 90,000 | 17.1 | 27,459 | -57 | -59 | 0.520 | 13.2 | 0.255 | 0.255 | 1.76 |
| 100,000 | 18.9 | 30,510 | -51 | -46 | 0.329 | 8.36 | 0.162 | 0.162 | 1.12 |
Many of Sable Systems' instruments, such as the OXZILLA II, the FC-10, the PA-10, the CA-10 and the FOXBOX, contain accurate, high resolution barometric pressure sensors that are used for correcting the instruments' readings to a standard pressure of 101.3 kPa. This eliminates drift caused by fluctuations in barometric pressure. The resolution of our sensors is so good (0.1 Pa) that they can easily discern and correct for a pressure change resulting from lifting the instrument a few inches. For calibration, we use our in-house, NIST-traceable ParoScientific pressure standard.
