Verify before flight. Check the POH/AFM for aircraft-specific limits and performance.
Weight & Balance
Percent MAC Calculator
Calculate aircraft center of gravity as percent mean aerodynamic chord from CG location, LEMAC, and MAC length.
in
in
in
Percent MAC—
Distance aft of LEMAC—
MAC—
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CG 11 inches aft of LEMAC
With CG at 86 in, LEMAC at 75 in and MAC length 50 in, (86 − 75) / 50 × 100 = 22% MAC.
All three distances must use the same datum and unit. Compare the result with the specific aircraft’s approved envelope at the loaded weight.
Formula and method
Percent MAC = (CG − LEMAC) ÷ MAC length × 100.