Use this calculator for flight-planning study or a first-pass cross-check when all inputs describe the same aircraft, atmospheric condition, and phase of flight.

Total moment (lb·in)

Sum of all load moments.

Total weight (lb)

Total aircraft weight.

Locate the aircraft center of gravity by dividing total moment by total weight. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

CG (in)

Center of gravity position aft of the datum.

• Do not use a generic calculator in place of the current aircraft flight manual, approved performance data, operating limitations, NOTAMs, weather, or regulations. Real performance changes with configuration, runway condition, altitude, temperature, wind, loading, and technique.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Cross-check the result against the aircraft flight manual or approved planning system, then apply the required safety margins. Keep signed wind, heading, altitude, speed, and fuel conventions explicit.

• Total Moment Calculator

  Compute the moment of a weight applied at a given arm.

• Weight Shift CG Calculator

  Compute how far the center of gravity moves when a load is shifted a given distance.

• CG Percent MAC Calculator

  Express the center-of-gravity position as a percentage of the mean aerodynamic chord.