Free tool

Weight & Balance Calculator

Enter your empty weight and CG, then each loading station — front seats, rear seats, baggage, and fuel — with the arm it acts on, and read back total weight, center of gravity, and whether the loaded point sits inside the CG envelope. The chart plots your loaded point and the zero-fuel point against the envelope so you can see the load walk forward as you burn off fuel.

The method is the same for any light single: each station's moment is its weight times its arm; total moment divided by total weight is the CG; that CG is checked against the forward and aft limits interpolated at your weight. Empty weight, empty CG, every station arm, and every load are yours to edit — type them off your aircraft's weight-and-balance form.

Pick your type; the limits come with it. The CG envelope, maximum weights, station caps and usable fuel are the selected type's certificated figures, taken from its FAA or EASA type certificate and checked against a frozen copy of that document on every build. What is not certificated is your airframe's basic empty weight and CG — those come off its own weighing record, and the seeded values are only representative. If you fly a type that isn't listed, the arithmetic is still right but the limits are not yours: read the total weight and CG, then compare them to your own POH rather than trusting the in/out verdict.

If you want to see how the CG moves as you load the cabin and burn off fuel, the CG envelope trainer does that with the same four types and preset scenarios.