How to Calculate The Top Of Climb/Cruise Altitude?

Another example of Andrew thinking he’s funny.

Wow lots of different and complicated ways of computing this!!

I like to keep it simple and through this forum have found these two simple formulas!

CRUISE HEIGHT

Total Distance / 7 = Flight Level.

Eg 240/7= 34 = FL340.

TOP OF DESCENT

FL / 3 = Distance To Go ( DTG) when to start your descent

eg FL340 / 3 = 113 nm.

Above are a rule of thumb and need to be adjusted for aircraft weight, traffic conditions etc but works in most cases!

7 Likes
  1. WMKK-WSSS TOTAL DISTANCE = 200 nm
    200/7= 28.57= FL290
  2. CALULATE TOD*
    FL290
    290/3 = 96.6
    Start your descent when 97 nm from dest.
5 Likes

Spot on there!

Keeping it simple. Like.

Thanks,Ya’al! See ya flying sometime.(Maybe)

Brilliant. That is so much easier to remember. Thank you.

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