Performance & Conditions
Calculators for understanding how atmospheric conditions affect aircraft performance. Density altitude, pressure altitude, true airspeed, and crosswind analysis.
Density Altitude Calculator
Calculate density altitude from field elevation, pressure, and temperature.
OpenPressure Altitude Calculator
Find pressure altitude from field elevation and altimeter setting.
OpenTrue Airspeed (TAS) Calculator
Convert indicated airspeed to true airspeed at altitude.
OpenCrosswind Calculator
Calculate headwind and crosswind components for any runway.
OpenTrue Altitude Calculator
Correct indicated altitude for non-standard temperature to estimate true altitude, with cold-temperature altimeter warnings.
OpenMach Number Calculator
Convert between true airspeed and Mach number in both directions, with local speed of sound.
OpenPilot Currency Calculator
Check FAR Part 91 pilot currency: passenger day/night, instrument recent experience, and flight review.
OpenMedical Certificate Expiration Calculator
Calculate FAA medical certificate expiration dates, class downgrade timelines, and BasicMed validity per 14 CFR 61.23.
OpenStandard Atmosphere Calculator & Table
ISA temperature, pressure, density, density ratio, and speed of sound at any altitude, with a searchable standard-atmosphere table and downloadable data.
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