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Weight & Balance
Moment & CG Calculator
Calculate aircraft center of gravity (CG), station moment, and moment/1000 from weight, arm, total moment, and total weight.
lb
in
lb-in
lb
Station moment—
Total CG—
Moment / 1000—
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A station moment and the total CG
A 180 lb station at an 85 in arm contributes 180 × 85 = 15,300 lb-in. Separately, 180,000 lb-in total moment divided by 2,200 lb total weight gives an 81.82 in CG.
The station calculation and total-CG calculation are independent inputs; the tool does not automatically add the station to the totals. Use full, unscaled total moment rather than moment/1,000.
Formula and method
Moment = weight × arm. Loaded center of gravity = total moment ÷ total weight.