A simplified table based upon the United States Standard Atmosphere.
| mb | in Hg | Altitude |
| 813 | 24.0 | 5974 |
| 820 | 24.5 | 5425 |
| 847 | 25.0 | 4886 |
| 864 | 25.5 | 4356 |
| 880 | 26.0 | 3824 |
| 897 | 26.5 | 3320 |
| 914 | 27.0 | 2814 |
| 931 | 27.5 | 2315 |
| 948 | 28.0 | 1824 |
| 965 | 28.5 | 1340 |
| 982 | 29.0 | 863 |
| 999 | 29.5 | 392 |
| 1013 | 29.92 | std sea level |
| 1016 | 30.5 | -73 |
| 1033 | 31.0 | -531 |