Mount Everest elevation in meters: the current consensus
The most widely cited official elevation for Mount Everest is 8,848.86 meters (29,031.7 feet) above sea level, established by joint surveys conducted by China and Nepal in 2020. This height is measured to the highest natural point of the summit snow or ice and is rounded to the nearest centimeter for mapping. Earlier commonly used figures include 8,848 meters and 8,850 meters; the 2020 result represents the most authoritative and precise measurement to date. Future remeasurement is possible because the summit surface can change due to snow accumulation, wind loading, and tectonic movement.
How elevation is defined and measured on Everest
Elevation on Earth is measured relative to a reference geoid approximating mean sea level; mountains are given a single vertical coordinate tied to this reference. On Everest, surveyors determine the height of the highest natural point of the summit, which may include snow, ice, and exposed rock but excludes loose, shifting materials that can be easily displaced. Methods include GNSS/GPS, satellite-based radar and lidar, precise leveling from nearby benchmarks, and ground-based theodolite observations. Because the summit is remote and conditions hazardous, no single measurement captures every nuance; multiple campaigns over decades refine the estimate.
Key survey milestones and changing estimates
Height estimates for Everest have evolved as techniques improve. Notable surveys span from mid-20th century expeditions to modern high-precision GNSS campaigns. Below is a concise overview of selected official measurements widely referenced by authoritative mapping agencies.
| Date or Period | Elevation (meters) | Surveying Authority / Campaign | Notes on Method or Context |
|---|---|---|---|
| 1955 (published later) | 8,848 | Survey of India | Classic benchmark widely cited for decades; used mean sea level references from Indian benchmarks. |
| 1975 | 8,848.13 | Chinese Academy of Sciences | Radar measurement of snow cap; first Chinese official result. |
| 1999 | 8,850 | National Geographic Society / US team | GPS-based estimate to rock head; not consistently adopted by mapping agencies. |
| 2005 | 8,844.43 | Chinese Mountaineering Association | Measured snow cap with radar; Chinese official figure for rock head. |
| 2010–2019 | 8,848 to 8,850 | Various regional and media references | Variations due to methodology and rounding; reflects ongoing interest. |
| 2020 | 8,848.86 | China and Nepal joint announcement | GNSS and ground survey consensus; official shared elevation. |
Note that rounding practices differ: agencies and media commonly cite 8,848 m, 8,848.86 m, or 8,850 m depending on purpose. The 2020 figure is the most current coordinated official result.
Why estimates vary and why remeasurement matters
Discrepancies arise from whether the measurement includes snow or exposed rock, choice of sea-level reference geoid, and precision of instruments. Tectonic uplift and subsidence, crustal rebound from ice mass changes, and episodic storm-driven snow deposition can change the summit height over time. Regular re-evaluation improves cartographic accuracy, supports geodesy research, and informs risk modeling for climbers and regional planning. The 2020 survey benefited from multi-GNSS observations, improved tropospheric corrections, and coordinated data-sharing between China and Nepal.
Practical implications for stakeholders
For climbers and expeditions, knowing the official elevation is less critical than understanding local conditions, route-specific altitude risks, and acclimatization protocols; maps and guiding services will reference the prevailing official figure. For research and policy, precise elevation underpits glacier mass balance studies, climate monitoring, and boundary descriptions in topographic mapping. Consistent elevation data also support regional geodetic infrastructure and international coordination. Regardless of minor future adjustments, the 2020 measurement remains the authoritative baseline for current and near-future use.
Summary and lasting references
- Mount Everest’s widely recognized elevation is 8,848.86 meters (≈29,031.7 feet) as jointly established in 2020 by China and Nepal.
- Height can vary slightly over time due to snow, wind, and tectonic movement, motivating periodic re-survey campaigns.
- Earlier estimates differ due to methodology, reference surfaces, and rounding; the 2020 result is the current standard for official mapping.
- For most non-technical purposes, citing 8,848.86 meters (or simply 8,848 meters) with a note that it is the latest coordinated measurement is appropriate and accurate.