Sir George was largely responsible for completing the section of the Great Trigonometric Survey of India along the meridian arc from the south of India extending north to Nepal, a distance of approximately 2400 kilometres. The survey was started by William Lambton in 1806 and lasted several decades. Mount Everest was named in his honour and surveyed by his successor, Andrew Waugh.
He was born in the Manor of Gwernvale at Crickhowell in Powys, in 1790.
Everest retired in 1843 and returned to live in the United Kingdom, where he became a Fellow of the Royal Society. He was knighted in 1861 and in 1862 he was elected Vice-President of the Royal Geographical Society. He died at Greenwich in 1866 and is buried in St Andrew's Church, Hove, near Brighton. His niece, Mary Everest, married mathematician George Boole.