E6B Flight Computer
Solve the wind triangle, time-speed-distance, and fuel, plus the unit conversions every pilot needs. Runs entirely in your browser.
How the E6B wind triangle works
The wind triangle finds the heading you must fly and the ground speed you'll make good when wind pushes you off your course. Given your true course, true airspeed, and the wind (direction it blows from and speed), the calculator computes the wind correction angle (WCA), your true heading, and ground speed:
- WCA = arcsin( (wind speed ÷ TAS) × sin(wind angle) )
- True heading = true course + WCA
- Ground speed = TAS × cos(WCA) − wind speed × cos(wind angle)
Time, speed & distance
Enter any two of ground speed, distance, and time and the third is computed: the classic "60-to-1" mental-math check, done exactly. Fuel burn multiplies your burn rate by time and adds an optional reserve (e.g. 0.75 hr for the 45-minute night VFR reserve).
FAQ
Is this E6B accurate enough for planning?
Yes. It uses the standard trigonometric wind-triangle and density-altitude approximations taught for the FAA knowledge test. As always, it's a planning aid; verify against your POH and current data.
Does it work offline?
Once the page has loaded, every calculation runs on your device with no network calls. The full SkyReady app takes this further: an offline-first logbook with currency and proficiency built in.
The calculator is just the start
These same calculations power the SkyReady app — alongside an offline-first logbook, automatic FAA currency, proficiency scoring, and a one-tap Go/No-Go readiness brief. Free to log.