Calculator Inputs
Formula Used
The calculator uses the haversine equation to estimate great circle distance between two coordinate points.
a = sin²(Δφ / 2) + cos φ1 × cos φ2 × sin²(Δλ / 2)
c = 2 × atan2(√a, √(1 − a))
Distance = Earth radius × c
Adjusted air miles include route correction and optional stopover detours.
Adjusted miles = Great circle miles × (1 + Route factor / 100) + Stopovers × Detour miles
Ground speed = Cruise speed + Wind adjustment
Airborne time = Adjusted miles / Ground speed
Fuel used = Airborne time × Fuel burn per hour
CO₂ = Fuel used × Emission factor
Loyalty miles = Adjusted miles × Earning rate × Cabin multiplier
How to Use This Calculator
- Enter the origin and destination names for your records.
- Add latitude and longitude for both airports or cities.
- Choose the cruise speed unit and enter the aircraft speed.
- Use wind adjustment to model tailwind or headwind effects.
- Add route factor when real routes are longer than direct paths.
- Enter stopovers, layover time, fuel burn, fare, and passenger count.
- Press the calculate button to view results above the form.
- Download the result as CSV or PDF for later use.
Example Data Table
| Route | Origin Lat | Origin Lon | Destination Lat | Destination Lon | Speed | Route Factor |
|---|---|---|---|---|---|---|
| New York to London | 40.6413 | -73.7781 | 51.4700 | -0.4543 | 488 knots | 5% |
| Los Angeles to Tokyo | 33.9416 | -118.4085 | 35.5494 | 139.7798 | 500 knots | 6% |
| Dubai to Singapore | 25.2532 | 55.3657 | 1.3644 | 103.9915 | 490 knots | 4% |
Air Miles and Flight Physics
Why air miles matter
Air miles describe the distance flown through the air. They are not always the same as road miles. Aircraft follow curved paths on a sphere. They also follow air traffic rules. Weather can shift the final route. This calculator starts with a great circle path. That path is the shortest route across Earth’s surface.
How the model improves accuracy
The route factor adds practical distance. It helps cover airway bends, holding patterns, and traffic control changes. Stopover detours can also be added. A direct flight may need only a small correction. A connecting journey may need a larger one. The wind field changes time more than distance. A tailwind raises ground speed. A headwind lowers it.
Flight time and speed
Flight time depends on adjusted miles and ground speed. Cruise speed is converted into miles per hour. Wind is then added or subtracted. Taxi and climb time are added after airborne time. Layovers are added for each stop. This gives a practical block time estimate.
Fuel, emissions, and cost
Fuel use is estimated from hourly burn. The method is simple but useful. It works well for planning and comparison. Real aircraft fuel burn changes with weight, altitude, climb, descent, and temperature. Emissions are estimated with a fuel factor. Cost is found from fuel price and fare data.
Planning with results
The final report shows miles, kilometers, nautical miles, speed, time, fuel, emissions, and loyalty miles. Passenger miles help compare commercial capacity. Cost per mile helps judge fare value. The chart gives a fast visual view. The export buttons make the result easy to store.
FAQs
1. What are air miles?
Air miles are the distance measured along an aircraft route. They often use great circle distance as a base, then include route corrections for real flight paths.
2. Why is great circle distance used?
Earth is roughly spherical. A great circle path gives the shortest surface path between two coordinates, so it is a strong base for flight distance.
3. What does route factor mean?
Route factor adds extra distance for airway routing, turns, holding, weather avoidance, and traffic control. A value from 3% to 8% is common for estimates.
4. How does wind affect flight time?
Wind changes ground speed. A tailwind increases ground speed and lowers time. A headwind decreases ground speed and increases time.
5. Are fuel results exact?
No. Fuel burn changes with aircraft type, payload, altitude, temperature, and flight phase. This tool gives a planning estimate using hourly burn.
6. What are nautical miles?
Nautical miles are common in aviation and marine navigation. One statute mile is about 0.868976 nautical miles.
7. How are loyalty miles calculated?
Loyalty miles are estimated by multiplying adjusted air miles by the earning rate and cabin multiplier. Airline programs may use different rules.
8. Can I export the result?
Yes. After calculation, use the CSV button for spreadsheet data or the PDF button for a printable report.