[HOTDOG]

Originally Posted by Fly4Pay

Generally, each 0.01 of altimeter difference equates to 10 feet of PA. SO--for a higher altimeter setting, you subtract from the field elevation, or for lower than standard you add. Here's your example:

30.37 Alt Setting
- 29.92 std day
--------------------
.45 difference x 1000 = 450 ft DECREASE (since pressure higher than standard)

1000 - 450 = 550 ft PA

This is not ABSOLUTELY exact, but it will be close enough for any chart you care to work.

Thanks!