By area:
* Tamu Massif in the northwest Pacific Ocean is the largest volcano by area, covering approximately 120,000 square miles (310,800 square kilometers). However, it's a shield volcano, with a very gentle slope and a very large base, and some scientists argue it might be a complex of several volcanoes that have merged.
By volume:
* Mauna Loa in Hawaii is the largest volcano by volume, containing approximately 18,000 cubic miles (75,000 cubic kilometers) of lava. However, it's worth noting that a significant portion of Mauna Loa is submerged beneath the ocean.
By height:
* Mauna Kea, also in Hawaii, is the tallest volcano from base to peak, reaching an elevation of 33,500 feet (10,210 meters) from its base on the ocean floor, although its summit is only 13,803 feet (4,205 meters) above sea level.
So, the answer depends on your definition of "largest":
* Area: Tamu Massif
* Volume: Mauna Loa
* Height: Mauna Kea
