How many active volcanoes are there in Hawaii?

total? try this - there's a lot of info here: http://volcano.und.nodak.edu/vwdocs/vwlessons/living_with/part6.html

Today only two volcanoes are left active, the Mauna Loa and the Kilauea at the southeasternmost end of the chain. Mauna Loa is considered the "monarch of mountains." It is the largest volcano and the largest single mountain of any kind in the world. It is 97 kilometers (60 miles) long, 48 kilometers (30 miles) wide, and rises about 8,742 meters (28,680 feet) from its base on the sea floor. The slopes of Mauna Loa are no steeper than 12°, with a mere 4° slope near the top. On the summit is an oval shaped caldera called Mokuaweoweo which is 4.8 kilometers (3 miles) long, 2.4 kilometers (1.5 miles) wide, and 183 meters (600 feet) deep. Eruptions usually begin as lava fountains on the floor of Mokuaweoweo and are followed by great volumes of lava, although sometimes eruptions flow without the initial outbreak. Mauna Loa is extremely prolific producing .9 to 4.5 million metric tons (1 to 5 million tons) of lava per hour in the early stages of an eruption. In 1831, three-fifths of a cubic mile was added to its mass. During the period between 1831 to 1950, Mauna Loa averaged an eruption every 3.6 years and was active nearly 6.2% of the time [Press, 1986]. The Kilauea Volcano is located about 3,048 meters (10,000 feet) below the summit of Mauna Loa. It is a shield volcano approximately 80 kilometers (50 miles) long and 22.5 kilometers (14 miles) wide that accumulated along the side of Mauna Loa. The summit of Kilauea is 1,250 meters (4,090 feet) above sea level, 6,096 meters (20,000 feet) above the ocean floor. The summit caldera is 4 kilometers (2.5 miles) long, 3.2 kilometers (2 miles) wide, and about 120 meters (400) feet deep. Near the southwestern edge of the caldera is the "fire pit," known as Halemaumau (House of Everlasting Fire), which has at times contained a lake of boiling lava. The pit is enlarged periodically by steam blasts and collapsing walls. In 1924, it was enlarged from 610 to 1,070 meters (2,000 to 3,500 feet) in diameter and measured 396 meters (1,300 feet) deep. Typical eruptions consist of lava flows forming lava lakes in Halemaumau or elsewhere on the caldera through fissures and rift zones. However, Halemaumau seems to be the principle conduit where lava reaches the surface.