An online E6B flight computer and preflight planning suite: the calculators and worksheets for the numbers every flight-planning and go/no-go decision runs on. No sign-up, no download. They work right in your browser.
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CalculatorsHeadwind and crosswind components, gusts included.
Pressure and density altitude for your conditions.
Estimated cumulus base from the temp/dew point spread.
CAS to TAS and Mach at altitude and temperature.
Solve time, groundspeed, or distance, plus an ETA.
Burn, endurance, and your reserve margin at landing.
The wind triangle: heading, WCA, and groundspeed.
The checkride sheet: every column computed, printed with Actual rows.
Gross weight, moment, and CG against your limits.
When to start down, and your still-air glide range.
Feet per NM to the fpm your VSI has to show.
Direct, teardrop, or parallel, with the AIM sectors.
The 1-2-3 rule and 600-2 / 800-2 minimums, checked.
A printable worksheet for your own limits.
A repeatable structure for the decision every tool here feeds into.
Where the numbers come from, and how to keep them honest.
Decode the forecast groups that decide if your window is flyable.
The NOTAMs that actually change a GA flight, and how to not miss them.
FlightDecide runs winds, ceilings, visibility, NOTAMs, fuel, performance, and W&B for your specific flight window and aircraft, then scores it GO, CAUTION, or NO GO and shows the raw data behind every call.
Get FlightDecide on the App StoreEvery calculator runs in your browser with nothing uploaded, and each comes with the formula, a worked example, and the judgment to use the number. They're built by the FlightDecide team, and built into the app's Tools tab too, where they work offline and stay free on every plan.
These tools are educational aids for flight-planning practice. They are advisory only and not a substitute for your POH, an official weather briefing, or your own judgment as pilot in command (14 CFR 91.3). Sources are cited on each tool's page. Last reviewed: August 26, 2026.