Jonas Aviation

Pilot Tools

Tools that are correct, or not published

Three tools are live today, each built on a fully tested calculation engine. The rest arrive only when they are correct and testable, never as buttons that pretend to work.

Status: the Wind Component Calculator, the Unit Converter and the Flight Time Calculator below are live and fully tested. The remaining tools are still on the workbench.

Available now

Wind component calculator

Split a runway wind into its headwind (or tailwind) and crosswind components. Enter both directions in the same reference frame; the wind direction is where the wind blows FROM, as reported by ATIS or a METAR.

Reference frame (shared by both headings)

Runway headings and wind directions must share one reference frame. This tool never converts between magnetic and true: no magnetic variation is applied, so convert your numbers before entering them if they come from different charts.

Independent educational resource; not approved flight training.

For education and simulator practice only. This tool gives no crosswind limits and no operational flight-planning advice: always use the aircraft's approved handbook and a qualified instructor for real decisions.

Available now

Aviation unit converter

Convert between the unit pairs that appear constantly in aviation: feet and metres, knots and km/h, kilograms and pounds, hectopascals and inches of mercury, litres and gallons, Celsius and Fahrenheit. Every conversion shows its factor and its result with explicit units.

Both unit pickers list only units of this quantity, so incompatible pairs such as feet and knots are never offered.

Values below zero are rejected for this quantity.

Conversion factors used

  • feet (ft): 1 ft = 0.3048 m exactly (international foot).
  • metres (m): Base unit of distance.

Independent educational resource; not approved flight training.

For education and simulator practice only. This converter gives no operational flight-planning advice: check any figure you rely on against official sources before using it.

Available now

Flight time, distance and groundspeed

Enter any two of distance, flight time and groundspeed and the third follows from distance = groundspeed × time. Distances are nautical miles, speeds are knots, and times use the strict H:MM format the engine requires.

Which value should we calculate?

Strict H:MM, minutes from 00 to 59, for example 2:00.

Groundspeed is not IAS or TAS. Indicated and true airspeed measure the aircraft against the air it is flying through; groundspeed is its speed over the ground once wind is accounted for. This calculator converts no airspeeds.

What the answer assumes. The result assumes a constant groundspeed throughout. It does not account for changing winds, the route actually flown, climb, descent or ATC delays.

Independent educational resource; not approved flight training.

For education and simulator practice only. Not approved for operational flight planning: never use this calculator to plan a real flight, and always follow the aircraft's approved procedures and a qualified instructor.

On the workbench

The next tools, each specified before it is written

Planned · not functional

Fuel arithmetic helper

An educational walk-through of tank capacity, burn rate and endurance arithmetic, practised with sample numbers and never for operational flight planning.

Planned · not functional

Speed reference explorer

Learn what stall, manoeuvre, design and maximum speed markings mean, and how they relate to one another, using illustrative examples only.

Our rules for tools

  • Every calculation shows its working, not just a result.
  • Inputs and outputs are unit-labelled, never a bare number.
  • Educational practice only: tools will never be presented as operational flight-planning equipment.
  • Each tool ships with tests. If a tool cannot be tested, it does not ship.