Free weather decoders and flight-planning calculators for pilots and ATPL students. Pick a category, open the tool you need, and get straight to the answer.
Decode live reports and read the operational weather picture before a flight, lesson, or study block.
The full overview of the free weather decoders and calculators, with guides on how to read each report.
Open toolPull a live METAR and TAF and compare up to four airports on one screen, with runway wind alignment.
Open toolLive, decoded METAR and TAF pages for the world's busiest airports, with the best runway for the wind.
Open toolA plain-language reading order so you stop treating a METAR like a wall of code.
Open toolWhat to check first in the forecast and how to follow the change groups without losing the thread.
Open toolRead operational notices faster and separate the critical item from the background noise.
Open toolUnderstand runway condition reporting and read SNOWTAM updates without guessing.
Open toolQuick, exam-aligned flight-planning maths: wind, altitude, temperature, speed, and unit conversions.
Headwind, tailwind, crosswind, and the gust case from a runway heading in seconds.
Open toolSee the altitude the aircraft really feels on a hot or high day using the 120 ft per degree rule.
Open toolTurn field altitude and QNH into pressure altitude with the standard 30 ft per hPa rule.
Open toolStandard temperature for any pressure altitude and the ISA+/ISA- deviation that drives performance.
Open toolConvert between TAS and Mach using the local speed of sound from temperature or ISA altitude.
Open toolConvert CAS or IAS to true airspeed from pressure altitude and temperature, with Mach alongside.
Open toolDistance, altitude, speed, mass, volume, pressure, temperature, and fuel volume to mass in one place.
Open toolThese free tools cover the weather and performance maths that Meteorology, Flight Planning, and General Navigation test. SkyStudy turns the full syllabus into exam-style question practice across all 14 ATPL subjects, with spaced repetition and timed mock exams. Free to start, no card needed.