Useful Load Calculator
Calculate useful load from maximum gross weight and empty weight.
Calculator
Result
About this calculator
Use the aircraft's certified weight definitions; terminology varies by aircraft.
How to use this calculator
What to enter
Enter or select the following as requested: Maximum gross weight (kg); Empty weight (kg). Follow the units, valid ranges, examples, and options displayed beside each field.
What the result means
The aviation result is an estimate based on the aircraft, route, weight, speed, wind, fuel, or performance values entered. Check units, aircraft-specific performance data, atmospheric assumptions, and whether reserve, taxi, climb, descent, and regulatory factors are included.
When to use it
Use this for educational or preliminary flight planning only. Never substitute a general calculator for the aircraft flight manual, approved performance charts, current weather, official procedures, or a pilot’s operational judgment.