https://www.brisbanehotairballooning.com.au/wp-content/uploads/PressuretoAltitudeConversion.pdf
Pressure to Altitude#
| Pressure (hPa) | Pressure (mmHg) | Pressure (inHg) | Pressure (atm) | Altitude (ft) | Altitude (m) |
|---|
| 1013.25 | 760 | 29.92 | 1.000 | 0 | 0 |
| 1000 | 750 | 29.53 | 0.987 | 364 | 111 |
| 950 | 713 | 28.05 | 0.938 | 1773 | 540 |
| 900 | 675 | 26.58 | 0.888 | 3243 | 989 |
| 850 | 638 | 25.10 | 0.839 | 4781 | 1457 |
| 800 | 600 | 23.62 | 0.790 | 6394 | 1949 |
| 750 | 563 | 22.15 | 0.740 | 8091 | 2466 |
| 700 | 525 | 20.67 | 0.691 | 9882 | 3012 |
| 650 | 488 | 19.19 | 0.642 | 11780 | 3591 |
| 600 | 450 | 17.72 | 0.592 | 13801 | 4206 |
| 550 | 413 | 16.24 | 0.543 | 15962 | 4865 |
| 500 | 375 | 14.76 | 0.493 | 18289 | 5574 |
| 450 | 338 | 13.29 | 0.444 | 20812 | 6344 |
| 400 | 300 | 11.81 | 0.395 | 23574 | 7185 |
| 350 | 263 | 10.34 | 0.345 | 26631 | 8117 |
| 300 | 225 | 8.86 | 0.296 | 30065 | 9164 |
| 250 | 188 | 7.38 | 0.247 | 33999 | 10363 |
| 200 | 150 | 5.91 | 0.197 | 38632 | 11775 |
| 150 | 113 | 4.43 | 0.148 | 44321 | 13509 |
| 100 | 75 | 2.95 | 0.099 | 51828 | 15797 |
| 50 | 38 | 1.48 | 0.049 | 63395 | 19323 |
Altitude to Pressure#
| Altitude (ft) | Altitude (m) | Pressure (hPa) | Pressure (mmHg) | Pressure (inHg) | Pressure(atm) |
|---|
| 0 | 0 | 1013.25 | 760 | 29.92 | 1.000 |
| 1000 | 305 | 977.17 | 733 | 28.86 | 0.964 |
| 2000 | 610 | 942.13 | 707 | 27.82 | 0.930 |
| 3000 | 914 | 908.12 | 681 | 26.82 | 0.896 |
| 4000 | 1219 | 875.10 | 656 | 25.84 | 0.864 |
| 5000 | 1524 | 843.07 | 632 | 24.90 | 0.832 |
| 6000 | 1829 | 811.99 | 609 | 23.98 | 0.801 |
| 7000 | 2134 | 781.85 | 586 | 23.09 | 0.772 |
| 8000 | 2438 | 752.62 | 565 | 22.22 | 0.743 |
| 9000 | 2743 | 724.28 | 543 | 21.39 | 0.715 |
| 10000 | 3048 | 696.81 | 523 | 20.58 | 0.688 |
| 11000 | 3353 | 670.20 | 503 | 19.79 | 0.661 |
| 12000 | 3658 | 644.41 | 483 | 19.03 | 0.636 |
| 13000 | 3962 | 619.43 | 465 | 18.29 | 0.611 |
| 14000 | 4267 | 595.24 | 446 | 17.58 | 0.587 |
| 15000 | 4572 | 571.82 | 429 | 16.89 | 0.564 |
| 16000 | 4877 | 549.15 | 412 | 16.22 | 0.542 |
| 17000 | 5182 | 527.22 | 395 | 15.57 | 0.520 |
| 18000 | 5486 | 506.00 | 380 | 14.94 | 0.499 |
| 19000 | 5791 | 485.47 | 364 | 14.34 | 0.479 |