While Mount Everest is the tallest mountain above sea level, Mauna Kea is much taller when measured from its base on the ocean floor.
Here's a breakdown:
* Mauna Kea:
* Height above sea level: 4,205 meters (13,796 feet)
* Height from base to peak: 10,203 meters (33,474 feet)
* Mount Everest:
* Height above sea level: 8,848 meters (29,029 feet)
* Height from base to peak: ~ 5,500 meters (18,000 feet)
As you can see, Mauna Kea's base extends much deeper into the ocean than Everest's, making it the tallest mountain from base to peak.
