The summit of Kilauea is about 4,091 feet (1,247 meters) above sea level.
However, Kilauea is a shield volcano, which means it has very gentle slopes. The elevation of the caldera (the large depression at the summit) is around 3,970 feet (1,210 meters).
Keep in mind that the elevation of Kilauea is constantly changing due to ongoing volcanic activity, so these figures may not be completely accurate.