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Learning hub · Tools

Free flight computer and calculators

The sums every student pilot learns, done for you as you type. Work each one by hand first, then use the tool to check your answer.

For learning and checking only. For a real flight, use your approved flight computer, the aircraft’s flight manual and official data.

Wind triangle

Heading to hold and groundspeed. Use a true course and the wind direction the wind blows from, as in a METAR.

How to work it out by hand

Runway crosswind

Headwind and crosswind for a runway. Enter the runway number (for 09 type 9, for 26 type 26) or the heading in degrees. Use wind and runway on the same north (both magnetic, as when the wind is passed by ATIS or the tower).

How to work it out by hand

Pressure and density altitude

Shows how hot, high or low-pressure conditions lengthen the take-off run. Uses the usual training rules of thumb: 30 ft per hPa and 120 ft per °C against ISA.

How to work it out by hand

Weight and balance

Type the mass and arm of each item (the example is the invented aeroplane from the loading lesson) and the limits from your flight manual. Fuel must be in kilograms: litres of avgas × about 0.72 (it varies a little with temperature).

How to work it out by hand

Descent planning

How far before a point to start descending, for a given angle. A 3° path loses about 300 ft per nautical mile (318 ft to be exact).

How to work it out by hand

Time and fuel for a leg

Time is distance divided by groundspeed. Enter the fuel burn in any unit per hour and the answer comes back in the same unit.

How to work it out by hand

Unit converter

Type one number to see it in the units pilots swap between. Read the line that matches what you have.

How to work it out by hand

Back to the learning hub. The app does these calculations for your whole route: see the student page.

For training and situational awareness only. Not certified for navigation. Always use official charts, the AIP, NOTAMs and a proper weather briefing for real flights.