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Density altitude
Temperature, pressure, humidity and altitude in; density altitude, air density and speed of sound out. The air your bullet actually flies through.
Density altitude
7915 ft
The altitude in a standard atmosphere with the same air density. What your bullet feels.
Air density
78.8%
of standard sea level (0.0603 lb/ft³)
Pressure altitude
4996 ft
Altitude from pressure alone.
Speed of sound
1147 fps
Sets where Mach 1 is.
Station pressure
24.90 inHg
At your location.
Sea-level pressure
29.93 inHg
As a weather report would give.
Air density falls with altitude and heat and rises with pressure. Humidity makes air very slightly less dense. Density altitude is the number most useful for comparing conditions: the higher it is, the less drag your bullet sees. Station pressure is what a barometer or Kestrel reads on the spot; a weather app gives sea-level pressure, which needs your altitude to convert.