It is unknown how many troops Pyrrhus had left in Tarentum, but he probably had about 25-35,000 troops with him at Heraclea.
ピュロスがタレントゥムにどれくらいの軍を置いてきたかは不明だが、恐らくヘラクレアにおよそ25,000から35,000の軍がいた。