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 requested fuel (kg)

Total fuel requested for the flight.

Planned block fuel (kg)

Planned block fuel without extras.

Compute the extra fuel carried above the planned block fuel from the total requested uplift. 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]

Extra fuel (kg)

Fuel carried above the planned block requirement.

• 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.

• Block Fuel Calculator

  Sum trip, contingency, alternate, final reserve, and taxi fuel into the total block fuel.

• Basic Block Fuel Subtotal Calculator

  Sum taxi, trip, contingency, and final-reserve components into a basic block-fuel subtotal; other required fuel may still apply.

• Contingency Fuel Percentage Calculator

  Compute the contingency allowance as a percentage of the planned trip fuel.