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.

Fuel weight (lb)

Usable fuel on board.

Payload (lb)

Total payload (crew, passengers, cargo).

Zero fuel weight (lb)

Zero fuel weight if known; overrides the payload input.

Compute the total takeoff weight from fuel and either ZFW or payload. 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]

Takeoff weight (lb)

Total weight at the start of the takeoff roll.

• 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.

• Payload Available Calculator

  Compute the remaining payload capacity after subtracting empty weight and fuel from max takeoff weight.

• Landing Weight Calculator

  Compute the landing weight by subtracting trip fuel from the takeoff weight.

• Zero Fuel Weight Calculator

  Compute the zero fuel weight as the sum of empty weight and payload.