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Old 4th July 2008, 20:18   #2 (permalink)
Intruder
 
Join Date: May 2000
Location: USA
Posts: 1,614
Quick formula:

TAS = IAS * [1 + (Altitude/1000 * .02)]

Altitude in feet

Or, TAS = IAS + 2% per 1000' altitude.
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