Which mountain is the tallest in the world measured from sea level?

Mount Everest is the tallest mountain in the world measured from sea level, at 8,848.86 metres.

Everest stands in the Himalayas on the border between Nepal and China’s Tibet Autonomous Region. Nepal commonly calls it Sagarmatha, while Tibetans call it Chomolungma. The English name honours George Everest, a former Surveyor General of India.

A 2020 survey by Nepal and China established the commonly cited height of 8,848.86 metres, including the snow and ice cap. Earlier measurements differed slightly because surveying methods and summit snow estimates varied.

Everest is not the point farthest from Earth’s centre: Ecuador’s Chimborazo is farther because Earth bulges at the equator. Mauna Kea is taller when measured from its underwater base, so the answer depends on the measurement used.