Transition level calculator

Transition Level Calculator

Enter QNH (970–1060 hPa):

Enter Transition Altitude (3000–18000 feet):

Rounding:

Some countries use only IFR Flight levels as Transition Levels, then you use Rounding to the nearest 10 FL, otherwise use rounding to nearest 5 FL.

When using only IFR Flight levels as Transition levels, the Transition layer is always between 1000 and 1999 feet.

When rounding up to the the nearest 5 Flight Levels the Transition layer is always between 1000 and 1499 feet.