Work out zero fuel weight instantly with clear inputs, formula shown and shareable results.
Zero fuel weight is the aircraft plus everything in it except usable fuel. It is limited because fuel in the wings relieves wing bending in flight: with too much weight in the fuselage and too little in the wings, the wing root loads exceed design values even if take-off weight is legal.
Zero fuel weight
ZFW = operating empty weight + payload; must not exceed MZFW
Aviation results are planning estimates only. Always verify take-off, landing, fuel, weight and balance figures against the certified Aircraft Flight Manual, current performance charts and applicable aviation regulations before flight.
Wing fuel acts downward and offsets the upward lift, reducing wing root bending moment. Payload in the fuselage does not, so it is limited separately.
No. Adding fuel raises take-off weight but does nothing to ZFW. The only fix is offloading payload.