Free aviation calculators for pilots

Density altitude, crosswind component, and weight and balance — the same problems you would work with an E6B or an electronic flight computer, without leaving the browser. No account, no upload. Built for pilots, instructors, and flight-test work.

Calculators

Density altitude calculator

Pressure altitude, ICAO density altitude (a DA calc with optional humidity), ISA temperature and ISA deviation, and a clearly labeled takeoff and climb rule of thumb for high density altitude days.

Open density altitude →

Crosswind calculator

Crosswind, headwind, and tailwind components for both runway ends, including gusts — a wind-component calculator in the same spirit as an E6B wind side or a runway crosswind chart.

Open crosswind →

Weight and balance calculator

A generic W&B and CG calculator: editable stations, takeoff and landing center of gravity, and an envelope plot. Example Cessna 172 and Piper Archer arms included — always verify against your aircraft.

Open weight & balance →

Why these tools

Most preflight questions come down to a handful of numbers: how much performance you will have at this density altitude, how much crosswind is on this runway, and whether the loaded airplane’s center of gravity is in the envelope. These calculators do that math in one place, with the formulas shown, so you can check an E6B, a flight-planning app, or a paper worksheet.

They are planning aids, not certified avionics. Always defer to the POH or AFM, official weather, and the weight and balance report for the airplane you actually fly.