E6B Flight Computer

Mobile-friendly E6B-style calculator for iPhone, Chrome, and Firefox. Includes wind correction, groundspeed, heading, time/fuel, density altitude, and unit conversions.

Wind Correction / Groundspeed

Enter true course, true airspeed, wind direction, and wind speed.

True Course (°)

True Airspeed (kt)

Wind From (°)

Wind Speed (kt)

Wind correction angle uses the crosswind component:
WCA = asin((Wind Speed × sin(WD − TC)) / TAS)
True Heading = True Course + WCA
Groundspeed is computed from corrected airspeed and headwind/tailwind components.

Results

Positive WCA means crab right, negative means crab left.

Wind Correction Angle—

True Heading—

Groundspeed—

Crosswind—

Head/Tailwind—

Drift Direction—

For training/planning only. Always verify with approved flight planning tools and POH/AFM data.

Time / Fuel / Distance

Provide any two values in each pair and calculate the third.

Distance (nm)

Groundspeed (kt)

Time (minutes)

Fuel Burn (gal/hr)

Fuel Needed (gal)

Reserve (minutes)

Time (hr) = Distance / Groundspeed
Fuel = Time × Fuel Burn
Reserve fuel is added from reserve minutes and hourly burn.

Results

Computed Distance—

Computed Groundspeed—

Computed Time—

Trip Fuel—

Reserve Fuel—

Total Fuel—

Pressure / Density Altitude

Simple E6B planning calculation using altimeter setting and OAT.

Field Elevation (ft)

Altimeter Setting (inHg)

OAT (°C)

ISA Deviation (optional °C)

Pressure Altitude = Field Elev + (29.92 − Altimeter) × 1000
ISA temp at altitude ≈ 15 − 2 × (PA in thousands of ft)
Density Altitude ≈ PA + 120 × (OAT − ISA Temp)

Results

Pressure Altitude—

ISA Temp—

ISA Deviation—

Density Altitude—

Quick Conversions

Enter a value in any field and tap calculate.

Nautical Miles

Statute Miles

US Gallons

Liters

Pounds

Kilograms

°C

°F

Conversion Notes

1 NM = 1.15078 statute miles
1 US gallon = 3.78541 liters
1 kg = 2.20462 lb
°F = (°C × 9/5) + 32

Tip: on iPhone, add this page to the Home Screen for an app-like experience.