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| Altitude
(feet) |
Barometer Reading | Atmos. Pressure | Boiling Point
�F |
||
| in. Hg | mm Hg | PSIA | Feet of Water | ||
| -1000 | 31.0 | 788 | 15.2 | 35.2 | 213.8 |
| -500 | 30.5 | 775 | 15.0 | 34.6 | 212.9 |
| 0 | 29.9 | 760 | 14.7 | 33.9 | 212.0 |
| 500 | 29.4 | 747 | 14.4 | 33.3 | 211.1 |
| 1000 | 28.9 | 734 | 14.2 | 32.8 | 210.2 |
| 1500 | 28.3 | 719 | 13.9 | 32.1 | 209.3 |
| 2000 | 27.8 | 706 | 13.7 | 31.5 | 208.4 |
| 2500 | 27.3 | 694 | 13.4 | 31.0 | 207.4 |
| 3000 | 26.8 | 681 | 13.2 | 30.4 | 206.5 |
| 3500 | 26.3 | 668 | 12.9 | 29.8 | 205.6 |
| 4000 | 25.8 | 655 | 12.7 | 29.2 | 204.7 |
| 4500 | 25.4 | 645 | 12.4 | 28.8 | 203.8 |
| 5000 | 24.9 | 633 | 12.2 | 28.2 | 202.9 |
| 5500 | 24.4 | 620 | 12.0 | 27.6 | 201.9 |
| 6000 | 24.0 | 610 | 11.8 | 27.2 | 201.0 |
| 6500 | 23.5 | 597 | 11.5 | 26.7 | 200.1 |
| 7000 | 23.1 | 587 | 11.3 | 26.2 | 199.2 |
| 7500 | 22.7 | 577 | 11.1 | 25.7 | 198.3 |
| 8000 | 22.2 | 564 | 10.9 | 25.2 | 197.4 |
| 8500 | 21.8 | 554 | 10.7 | 24.7 | 196.5 |
| 9000 | 21.4 | 544 | 10.5 | 24.3 | 195.5 |
| 9500 | 21.0 | 533 | 10.3 | 23.8 | 194.6 |
| 10000 | 20.6 | 523 | 10.1 | 23.4 | 193.7 |
| 15000 | 16.9 | 429 | 8.3 | 19.2 | 184.0 |