Elevation Difference Between Mount Everest and the Dead Sea: 9,279 Meters

Mount Everest summit: 8,848.86 m (29,031.7 ft) above sea level.
Dead Sea surface: ~-430 m (-1,411 ft) below sea level.

The total elevation difference is:

8,848.86 m + 430 m = 9,278.86 meters (≈30,442 feet).

This represents the greatest vertical relief between any two points on Earth's land surface.