Left column shows intervals of local pressure (QNH) in hecto Pascal (millibar). Corresponding local pressure in inches of mercury is found in the right-most column. The other columns show the Transition altitude at top and below are the corresponding Transition levels depending on QNH.
QNH (hPa) |
3000ft | 4000ft | 5000ft | 6000ft | 7000ft | Inch. of Merc *) |
| 942 - 959 | 60 | 70 | 80 | 90 | 100 | 27.82 - 28.33 |
| 960 - 977 | 55 | 65 | 75 | 85 | 95 | 28.34 - 28.86 |
| 978 - 995 | 50 | 60 | 70 | 80 | 90 | 28.87 - 29.39 |
| 996 - 1013 | 45 | 55 | 65 | 75 | 85 | 29.40 - 29.92 |
| 1014 - 1031 | 40 | 50 | 60 | 70 | 80 | 29.93 - 30.46 |
| 1032 - 1050 | 35 | 45 | 55 | 65 | 75 | 30.47 - 31.03 |
1051 - |
30 | 40 | 50 | 60 | 70 | 31.04 - |
*) 1 hPa equals approximately 0.0295 inches of mercury. Values in this column are slightly adjusted to prevent gaps in the values. A complete conversion table is found here.
For more information on TA and TL, look here (in Norwegian only).