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Free Online E6B Calculator and Flight Computer

A complete E6B flight computer in your browser: density altitude, true airspeed, wind correction, ground speed, fuel burn, fuel weight, temperature, and unit conversions. No download.

The E6B flight computer, online

The E6B is the circular slide rule student pilots learn on and working pilots keep in the flight bag. This online E6B calculator moves the most-used functions into your browser, so you can run the numbers on any phone, tablet, or laptop without carrying the physical wheel. It is free, needs no account, and works the same whether you are planning at the FBO or double-checking a figure before a checkride.

What this online E6B calculator does

Every tab is a working E6B calculation, built on the same relationships as the mechanical wheel:

  • Density altitude — pressure altitude and outside air temperature to density altitude, with ISA deviation.
  • True airspeed — calibrated airspeed corrected for pressure altitude and temperature.
  • Wind correction and ground speed — wind-triangle heading, wind correction angle, and ground speed.
  • E6B fuel calculator — fuel burn by time or distance, plus fuel weight for Jet-A, avgas, and diesel.
  • Temperature and unit conversions — Celsius and Fahrenheit, plus distance, speed, weight, volume, and pressure units.

No download, no account

There is nothing to install. Pick a tab, enter your numbers, and the result updates instantly. Bookmark this E6B calculator online for quick access on the ground. When you need the same tools offline in the cockpit, the full E6B is built into the Sky Duty iOS app alongside scheduling, logbook, maintenance, and expenses.

Get Sky Duty for E6B on the go

The Sky Duty iOS app includes the full E6B calculator plus scheduling, logbook, maintenance, and expense tracking. All available offline.

Managing more than one aircraft? The same calculations live inside Sky Duty, the flight-operations platform that runs the whole department — scheduling, a pilot logbook, maintenance, and expenses in one place.

Density Altitude Calculator

Density altitude for hot-and-high days

Weight & Balance Calculator

Center of gravity and CG limit checks

Fuel Burn Calculator

Fuel used, jet fuel weight, and endurance

Crosswind Calculator

Crosswind and headwind or tailwind components

Zulu Time Converter

Convert local time to Zulu (UTC) and back

See all features

Scheduling, logbook, maintenance, and expenses

FAQ

Frequently Asked Questions

What is an E6B flight computer?
The E6B is a circular slide rule used by pilots for flight planning calculations. It computes fuel burn, wind correction, time-speed-distance, and unit conversions. This online calculator handles the most common E6B conversions digitally.
How do I convert fuel weight to volume?
Divide the weight by the fuel density. Jet-A weighs 6.7 pounds per gallon, Avgas 100LL weighs 6.0 pounds per gallon, and diesel weighs approximately 6.8 pounds per gallon.
What is the weight of jet fuel per gallon?
Jet-A fuel weighs approximately 6.7 pounds per US gallon (about 0.80 kg per liter) at standard temperature. This varies slightly with temperature — colder fuel is denser.
Is this online E6B calculator free?
Yes. This E6B calculator is completely free to use — there is no account, no sign-up, and no download. Open the page, pick a tab, enter your numbers, and the result updates instantly on any phone, tablet, or laptop.
Do I need to download an app to use the E6B online?
No. This is a full E6B flight computer that runs in your browser, so nothing needs to be installed to run the numbers on the ground. If you want the same tools offline in the cockpit, the E6B is also built into the Sky Duty iOS app alongside scheduling, logbook, maintenance, and expenses.
What can an online E6B flight computer calculate?
This online E6B computes density altitude, true airspeed, wind correction angle and ground speed, fuel burn by time or distance, fuel weight for Jet-A, avgas, and diesel, and temperature and unit conversions — the same relationships the mechanical E6B wheel is built on.
GET STARTED

Get the full E6B calculator in Sky Duty

Plus scheduling, logbook, maintenance, and expense tracking. All in one offline-first iOS app.

Download on the App Store