Atmospheric Physics calculators
Absolute Humidity Calculator Calculate absolute humidity in g/m3 from temperature and relative humidity. Also get dew point, actual vapor pressure, and saturation vapor pressure instantly.
Open Air Density Calculator Calculate air density from temperature, pressure, and humidity. Supports metric and imperial units, dry and moist air modes, with full step-by-step working shown.
Open Air Pressure at Altitude Calculator Calculate air pressure at any altitude using the ISA standard atmosphere or barometric formula. Results in Pa, hPa, atm, mmHg, inHg, plus air density.
Open Cloud Base Calculator Calculate cloud base height (LCL) from surface temperature and dew point in metric or imperial units. Get altitude above ground, AMSL, and cloud temperature instantly.
Open Density Altitude Calculator Calculate density altitude, pressure altitude, and air density with humidity correction. Essential for aviation performance, engine output, and takeoff planning.
Open Dew Point Calculator Calculate dew point from temperature and relative humidity, or reverse-solve for RH or air temperature. Includes comfort rating, absolute humidity, and Magnus formula.
Open Heat Index Calculator Calculate the heat index (feels-like temperature) from air temperature and humidity or dew point. Get the NWS danger category and health risk instantly.
Open Kinematic Viscosity of Air Calculator Calculate the kinematic viscosity of air at any temperature and pressure using Sutherland's law and the ideal gas law. Outputs dynamic viscosity and air density too.
Open Lightning Distance Calculator Calculate how far away lightning struck by counting seconds between flash and thunder. Adjusts for air temperature and shows distance in miles or kilometres.
Open