Speed · Distance · Time
Enter any two values, the third is solved automatically.
Leave the field you want solved blank, or it'll be overwritten by the other two whenever it's not the most recently edited.
Unit Converter
General distance & speed conversion.
Wind Correction & Groundspeed
Classic wind-triangle solution — true heading and groundspeed from course, TAS and wind.
Headwind / Crosswind Components
Useful for runway wind limits.
Pressure & Density Altitude
Field elevation, altimeter setting and OAT solve pressure altitude, density altitude and the ISA deviation.
True Airspeed & Mach
From calibrated airspeed, pressure altitude and temperature.
Fuel Planning
Enter any two of burn rate, endurance and fuel quantity.
Mixed units (e.g. gal/hr burn with a kg quantity) assume Jet A / Avgas density of 6.7 lb/gal — adjust manually for your fuel type if needed.
Temperature
ISA Deviation
Standard temperature at altitude (ISA = 15°C, lapse rate 2°C/1000ft) compared to actual OAT.