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.

Trip fuel (kg)

Fuel for the planned route.

Contingency fuel (kg)

Reserve for unforeseen deviations.

Alternate fuel (kg)

Fuel to reach the alternate airport.

Final reserve fuel (kg)

Fuel held in reserve at arrival.

Taxi fuel (kg)

Fuel expected to be used on the ground before takeoff.

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

Block fuel (kg)

Total ramp fuel required for the flight.

• 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.

• 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.

• Minimum Fuel Required

  Add planned trip, alternate, contingency, and final-reserve fuel in one consistent unit, then show the margin against fuel on board. It does not substitute for route-specific regulations or aircraft performance planning.

• Contingency Fuel Calculator

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