Both countries agreed a new height of 8,848.86m – a slight increase on Nepal’s figure but adding more than four metres to the height China previously accepted for the peak.
The new height was agreed after surveyors were sent by China and Nepal to their respective sides of the mountain in 2019 and 2020.
Chinese leader Xi Jinping said the two sides were committed to jointly protecting the environment around Everest and cooperating in scientific research.
Debate over the actual height of the peak has intensified in recent years over concerns that it might have shrunk after a major earthquake in 2015. Disagreements have also focused on whether snow covering the peak should be included.
Nepal previously measured Everest’s height as 8,848 metres, while China put it at 8,844.43, because it did not include the snow cap.
But wrangling over the exact height of the mountain, named after George Everest, a former Surveyor General of India, has been a hot topic for decades.
The figure of 8,848 metres became widely accepted following a survey by Indian officials in the 1950s. It was used by cartographers until the late 1990s, despite conflicting surveys in the intervening decades, including in 1987 when Italian experts recorded a height of 8,872 metres.