Kammala wannan jumlar: A wasannin Olympics na Rio de Janeiro, Chalmers ta lashe lambar zinare a
100 mita freestyle a cikin sabon rikodin duniya na matasa na 47.58, Australiya ta farko da ta yi hakan tun Michael Wenden a 1968. Ya kuma yi iyo mafi sauri a cikin zafin jiki, tare da 47.90s ya karya nasa rikodin duniya na matasa. A cikin tseren tseren mita 4x100, ya ba da gudummawa ga Ostiraliya ta dauki lambar tagulla. A cikin relay na medley, yana da mafi saurin raba filin tare da lokacin 46.72, wanda ya taimaka wa ƙungiyar ta lashe lambar tagulla. A tarihi kawai Pieter van den Hoogenband (46.70 a 2003), Vladimir Morozov ((46.69 a 2017), Cameron McEvoy ((46.60 a 2015)) da Duncan Scott (46.14 a 2019 da Jason Lezak (46.06 a 2019) sun kasance da sauri a cikin kayan wanka na yadi.