The largest mountain in the world in terms of volume is Mauna Kea in Hawaii.

While Mount Everest is the highest mountain above sea level, Mauna Kea is much larger when you consider its base on the ocean floor.

Here's a breakdown:

* Mauna Kea:

* Height above sea level: 4,207 meters (13,796 feet)

* Height from base to peak: 10,203 meters (33,474 feet)

* Volume: 32,000 cubic kilometers (7,700 cubic miles)

* Mount Everest:

* Height above sea level: 8,848.86 meters (29,031.7 feet)

* Height from base to peak: ~ 3,650 meters (11,975 feet)

* Volume: Much smaller than Mauna Kea, estimated to be around 1,300 cubic kilometers (310 cubic miles)

So, while Mount Everest is the tallest mountain, Mauna Kea dwarfs it in terms of sheer size.