What is the officially measured height of Mount Everest above sea level?

Mount Everest's officially measured height is 8,848.86 metres above sea level.

Nepal and China announced this joint height in December 2020 after new surveys measured the summit using modern satellite positioning and other techniques. The figure includes the snow and ice cap at the summit, which can change over time.

Everest is part of the Himalayas on the border between Nepal and Tibet, an autonomous region of China. Its Nepali name is Sagarmatha, while the Tibetan name is Chomolungma. The mountain is also known as Mount Everest in honour of George Everest, a former Surveyor General of India.

Earlier official measurements differed because of surveying methods and uncertainty about the summit snow layer. The mountain continues to rise slowly as the Indian and Eurasian tectonic plates interact, while earthquakes and erosion can affect its elevation.