Calculator
Example Data Table
| Aircraft Type | Fuel Flow | Engines | Trip Time | Reserve | Contingency | Taxi Fuel |
|---|---|---|---|---|---|---|
| Single engine trainer | 9 US gal/hr | 1 | 2.0 hr | 45 min | 5% | 2 US gal |
| Light twin | 16 US gal/hr per engine | 2 | 1.8 hr | 45 min | 8% | 5 US gal |
| Turbine aircraft | 260 lb/hr per engine | 2 | 3.2 hr | 60 min | 10% | 80 lb |
Formula Used
Trip time from entered time: Trip Time = Hours + Minutes ÷ 60
Trip time from route data: Trip Time = Distance ÷ Average Ground Speed
Total fuel flow: Total Flow = Fuel Flow Per Engine × Number of Engines
Trip burn: Trip Burn = Total Flow × Trip Time
Reserve fuel: Reserve Fuel = Total Flow × Reserve Time
Contingency fuel: Contingency Fuel = Trip Burn × Contingency Percent
Total required fuel: Total Required = Trip Burn + Reserve Fuel + Contingency Fuel + Taxi Fuel
Fuel margin: Fuel Margin = Usable Fuel Onboard - Total Required Fuel
Estimated cost: Cost = Total Required Fuel × Fuel Price Per Unit
How to Use This Calculator
Enter the fuel flow for one engine. Select the correct flow unit. Add the number of engines. Choose whether the calculator should use entered flight time or calculate time from distance and speed. Add reserve minutes, contingency percentage, taxi fuel, fuel density, usable fuel onboard, and fuel price. Select your preferred result unit. Press calculate. The result appears below the header and above the form. Use CSV for spreadsheet records. Use PDF for a simple flight planning report.
About Aviation Fuel Consumption Planning
Why Fuel Burn Matters
Aviation fuel planning is more than a quick burn estimate. It supports route safety, cost control, payload planning, and dispatch review. A pilot or planner must know how much fuel the aircraft may use during cruise, climb allowance, taxi, reserve, and delay periods. This calculator gives a structured way to compare those pieces before a flight.
Trip Fuel and Time
The main value starts with fuel flow. Fuel flow may come from a pilot operating handbook, engine monitor, flight manual, or past trip log. Enter the flow for one engine. Then enter the engine count. The tool multiplies the values and applies the planned time. Time can be typed directly, or it can be derived from nautical miles and average ground speed.
Reserve and Contingency
Reserve fuel protects the plan when the flight takes longer than expected. Weather, holding, routing, runway changes, and headwinds can increase actual burn. Contingency fuel adds another layer. It is entered as a percentage of trip burn. This makes the reserve plan easy to scale for short and long routes.
Units and Density
Aviation fuel may be measured in gallons, liters, kilograms, or pounds. Weight based fuel is common in larger aircraft. Volume based fuel is common in many light aircraft. The calculator converts units with fuel density. Jet fuel is often near 0.80 kg per liter, but actual density can change with fuel type and temperature.
Cost and Range Review
The cost field helps estimate trip expense. The fuel onboard field checks whether the aircraft has enough usable fuel for the plan. A positive margin suggests the plan fits the entered fuel amount. A negative margin means the plan needs review. The endurance and range estimates are planning aids only. Always verify final fuel with approved aircraft data, legal requirements, and current operating conditions.
FAQs
1. What fuel flow should I enter?
Enter the expected fuel flow for one engine. Use your aircraft manual, engine monitor, or verified planning data. Do not guess for real flight dispatch.
2. Can I calculate time from distance?
Yes. Select the distance and speed method. Enter nautical miles and average ground speed. The calculator divides distance by speed to estimate flight time.
3. What does contingency fuel mean?
Contingency fuel is extra fuel added as a percentage of trip burn. It helps cover routing changes, wind differences, minor delays, and planning uncertainty.
4. Why is fuel density included?
Density allows conversion between volume and weight units. It is important when comparing gallons, liters, kilograms, and pounds in one calculation.
5. Does this replace official flight planning?
No. This tool is only an estimate. Always use approved aircraft documents, operating rules, weather data, and required reserve standards before flight.
6. What does fuel margin show?
Fuel margin compares usable fuel onboard with total required fuel. A positive value means fuel remains after the planned trip, reserve, contingency, and taxi fuel.
7. Can I use this for turbine aircraft?
Yes. Select pounds per hour or kilograms per hour if your aircraft uses weight based fuel planning. Enter flow per engine for accurate totals.
8. What do the export buttons do?
The CSV button downloads spreadsheet friendly results. The PDF button downloads a simple report with the main fuel values and planning status.