Density Altitude Calculator

Density altitude chart by elevation and temperature

Each row is a field elevation and each column a temperature, all at a standard 29.92 inHg altimeter setting and dry air. Read across to see how fast a warm afternoon lifts density altitude above the field. For your own field and today's weather, use the calculator.

Not for flight planning. Use your aircraft's POH or flight manual and an official weather briefing.

Open these numbers in the calculator and change them to match your own conditions.

Altimeter 29.92 inHg, dry air. A real dew point adds to every figure.
Elevation40 F (4 C)60 F (16 C)80 F (27 C)100 F (38 C)
0 ft-1,262 ft84 ft1,368 ft2,594 ft
1,000 ft-17 ft1,317 ft2,590 ft3,806 ft
2,000 ft1,226 ft2,549 ft3,811 ft5,016 ft
3,000 ft2,466 ft3,778 ft5,029 ft6,224 ft
4,000 ft3,705 ft5,006 ft6,246 ft7,430 ft
5,000 ft4,942 ft6,231 ft7,460 ft8,635 ft
6,000 ft6,177 ft7,454 ft8,673 ft9,837 ft
7,000 ft7,409 ft8,676 ft9,883 ft11,037 ft
8,000 ft8,640 ft9,895 ft11,092 ft12,235 ft

A lower altimeter setting raises every figure too, by roughly 1,000 ft for each inHg below 29.92 (about 900 ft at 5,000 ft by the full formula).

How these figures are worked out

Each figure uses the National Weather Service method: station pressure from the altimeter setting and elevation, vapour pressure from the dew point, then virtual temperature and density altitude. The calculator runs the same code. Figures are rounded to the nearest foot and are estimates.

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