Free Aviation Calculators for Pilots

E6B-style flight calculators, a live METAR and TAF decoder, airport code lookup and plain-English guides for pilots, student pilots and dispatchers. Every tool shows its method with a worked example, supports inHg and hPa, feet and metres, and runs free in your browser with no sign-up.

Aviation Tools Aviation Guides

Built and reviewed by KZHEL, creator and editor of USFITools. Method, sources and limitations are explained on this page.

Aviation Tools for Pilots

View all aviation tools

METAR & TAF DecoderLive airport weather decoded into plain English.Density Altitude CalculatorPressure and density altitude in inHg or hPa.Wind Correction AngleE6B wind triangle: heading and ground speed.Crosswind ComponentRunway crosswind and headwind from the reported wind.Weight and BalanceTotal weight, moment and centre of gravity.Aviation Fuel CalculatorFuel required, reserves and endurance.True AirspeedConvert IAS or CAS to TAS.Airport Code LookupFind ICAO and IATA airport codes.Pressure AltitudePressure altitude from elevation and altimeter setting.Holding Pattern EntryDirect, parallel or teardrop entry from your heading.Time, Speed & DistanceE6B time, speed, distance and fuel problems.Descent RateTop of descent and rate for a 3° path.ETP & PNREqual time point and point of no return.Mach NumberMach to TAS and back from temperature.Turn Rate & RadiusStandard-rate bank, turn radius and load factor.Glide DistanceEngine-out glide range with wind.

Aviation Guides

All guides

True vs Magnetic Heading: Variation and Deviation ExplainedHow to turn a true course into a compass heading with wind correction, magnetic variation and deviation, with…IFR Alternate Requirements: The 1-2-3 Rule and Alternate MinimumsWhen an IFR flight plan needs an alternate under 14 CFR 91.169, the standard alternate minimums, and how…Glide Ratio and Glide Distance: How Far Can You Glide?How to work out engine-out glide range from height, glide ratio and wind, with a still-air table and…Standard-Rate Turns: Bank Angle, Turn Radius and Load FactorHow much bank a standard-rate turn needs at any speed, how big the circle is, and why holding…Mach Number Explained: Speed of Sound, TAS and Crossover AltitudeWhy jets fly a Mach number at altitude, how the speed of sound depends on temperature, and how…Equal Time Point and Point of No Return Explained (ETP and PNR)How to work out the equal time point and point of no return from distance, groundspeeds and endurance,…

Built for pilots, useful for everyone

USFITools started as a set of aviation calculators and live airport weather tools for pilots, student pilots and aviation professionals in the US, UK, Europe, Canada and Australia. Every aviation tool explains its method with a worked example and supports both inHg and hPa, feet and metres, and °C and °F.

Every guide is paired with a calculator, so you can read the method and then run your own numbers. Topics follow the private pilot, instrument and dispatcher syllabus: aviation weather, altimetry, performance, navigation and flight planning.

Studying for the FAA Aircraft Dispatcher knowledge test? Try the 129-question dispatcher practice test with explanations and references, or start with the free ground school toolkit and the aviation guides.

Aviation tools are built and reviewed by KZHEL, an independent aviation-focused publisher with a background in the aviation field. For flight decisions, always confirm results with official publications, approved aircraft data and your operator procedures.