Physics

Density Altitude Calculator

Find density altitude from pressure altitude and temperature.

Calculated Output

Density altitude 7,364.12

Formula: DA = PA + 118.8·(OAT − ISA)

Step-by-Step Breakdown

1. Values used:

2. Pressure altitude = 5,000

3. Outside air temperature = 25 °C

5. Density altitude = 7,364.12

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The math behind it

DA ≈ PA + 118.8·(OAT − ISA), where ISA temperature ≈ 15 − 1.98·(PA/1000) °C.

5000 ft pressure altitude at 25 °C → about 7375 ft density altitude.

Why does hot weather hurt takeoff?

Higher density altitude means thinner air, reducing lift and engine power.