Acala (Achala) was one of the kings of Vṛhadratha’s (Vrihadratha) lineage who ruled over the kingdom of Magadha, in Kaliyuga. He was the son of Mahīnetra (Mahinetra), the king of Magadha, and the father of Ripuñjaya (Ripunjaya). It is known that King Acala ruled over Magadha for thirty-two years.