Under warmer conditions, which altitude is higher: density altitude or standard pressure altitude?

• A. Density altitude
• B. Standard pressure altitude
• C. They are the same
• D. It cannot be determined

Answer: (A)

Density altitude is higher in warmer conditions because temperature directly affects air density. Density altitude is defined as the altitude in the standard atmosphere where the air would have the same density as the air currently around you. Warmer air is less dense, so to reach the same density you would have to be at a higher altitude. Standard pressure altitude, on the other hand, is determined by pressure alone and uses the standard density; it doesn’t account for the actual density change caused by temperature. So when it’s warmer, the density altitude rises above the standard pressure altitude.