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.

Burn rate (kg/h)

Holding fuel consumption rate.

Hold time (min)

Endurance to protect; thirty minutes is the typical turbine standard.

Compute the final reserve fuel needed to hold for a given time at the holding burn rate. 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]

Final reserve fuel (kg)

Fuel reserved for holding at the destination.

• 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.

• Holding Fuel Required Calculator

  Compute the fuel required to hold for a given time at the expected burn rate.

• Required Reserve Fuel Calculator

  Compute the reserve fuel needed for a given endurance time and consumption rate.

• Descent Rate Calculator

  Compute the vertical speed needed to hold a descent angle at a given ground speed.