Ground Speed Calculator
Find ground speed from true airspeed, course and wind using the wind triangle.
Flight Speed and Distance
All Calculators
Thirty calculators in eight topics. Each page has clearly labeled inputs with unit selectors, the formula it uses, a worked example, its assumptions and the mistakes people commonly make with it. Everything runs in your browser.
Flight Speed and Distance
Topic page and guidesTrue Airspeed Calculator
Convert calibrated airspeed to true airspeed from pressure altitude and outside air temperature.
Flight Speed and Distance
Indicated Airspeed Conversion Calculator
Step from indicated airspeed to calibrated, equivalent and true airspeed with your own position-error correction.
Flight Speed and Distance
Mach Number Calculator
Divide true airspeed by the local speed of sound to get Mach number.
Flight Speed and Distance
Flight Distance Calculator
Great-circle distance and initial true course between two latitude and longitude points.
Flight Speed and Distance
Flight Time Calculator
Time en route from distance and ground speed, in hours and minutes.
Flight Speed and Distance
Aviation Navigation
Topic page and guidesWind Correction Angle Calculator
Wind correction angle, true heading and ground speed for a course and wind.
Aviation Navigation
True Heading and Magnetic Heading Calculator
Convert between true, magnetic and compass headings with variation and deviation.
Aviation Navigation
Wind Calculations
Topic page and guidesCrosswind Component Calculator
Split a reported wind into crosswind and headwind components for a runway heading.
Wind Calculations
Headwind and Tailwind Calculator
Find the headwind or tailwind component of any wind along your track.
Wind Calculations
Atmosphere and Altitude
Topic page and guidesDensity Altitude Calculator
Density altitude from field elevation, altimeter setting and outside air temperature (dry air).
Atmosphere and Altitude
Pressure Altitude Calculator
Pressure altitude from elevation and the current altimeter setting.
Atmosphere and Altitude
Standard Atmosphere Calculator
ISA temperature, pressure, density and speed of sound at any altitude up to 20 km.
Atmosphere and Altitude
Air Density Calculator
Air density from pressure, temperature and optional relative humidity.
Atmosphere and Altitude
Speed of Sound Calculator
Speed of sound in air from temperature, in knots, m/s, km/h, mph and ft/s.
Atmosphere and Altitude
Altimeter Pressure Conversion Calculator
Convert altimeter settings between inHg, hPa (millibars), mmHg, kPa and psi.
Atmosphere and Altitude
Aviation Fuel Mathematics
Topic page and guidesFuel Consumption Calculator
Average fuel flow per hour and fuel per distance from fuel used and time flown.
Aviation Fuel Mathematics
Fuel Endurance Calculator
How long a quantity of usable fuel lasts at a constant fuel flow.
Aviation Fuel Mathematics
Fuel Required Calculator
Trip fuel from distance, ground speed and fuel flow, plus any extra fuel you enter.
Aviation Fuel Mathematics
Aircraft Performance Concepts
Topic page and guidesAircraft Range Estimator
A simple constant-speed, constant-fuel-flow range estimate with a wind component you enter.
Aircraft Performance Concepts
Rate of Climb Calculator
The rate of climb that matches a climb gradient at a given ground speed.
Aircraft Performance Concepts
Climb Gradient Calculator
Climb gradient in percent, feet per nautical mile and degrees from rate of climb and ground speed.
Aircraft Performance Concepts
Thrust-to-Weight Ratio Calculator
Thrust divided by weight, with thrust and mass in the units you have.
Aircraft Performance Concepts
Aerodynamics
Topic page and guidesLift Force Calculator
Lift from air density, true airspeed, wing area and a lift coefficient you supply.
Aerodynamics
Drag Force Calculator
Drag from air density, true airspeed, reference area and a drag coefficient you supply.
Aerodynamics
Wing Loading Calculator
Wing loading from aircraft mass and wing area, in kg/m², lb/ft² and N/m².
Aerodynamics
Turn Radius Calculator
Radius and rate of a level coordinated turn from true airspeed and bank angle.
Aerodynamics
Load Factor Calculator
Load factor in a level turn from bank angle, and the matching rise in stall speed.
Aerodynamics
Aviation Units and Conversions
Topic page and guidesNautical Miles to Kilometers Calculator
Convert nautical miles to kilometers, statute miles, meters and feet, in either direction.
Aviation Units and Conversions
Aviation Unit Conversion Calculator
Convert the speed, distance, altitude, mass, volume, pressure and temperature units used in aviation.
Aviation Units and Conversions
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