"Focus" debuted at number seven on the "Billboard" Hot 100 in the United States, selling 113,000 digital downloads in its first full week, becoming Grande's sixth top-ten single and fourth top-ten debut on the chart. It was her first solo top ten in the country, unaccompanied by another artist. The song entered the Digital Songs chart at number five and was number 13 on the Streaming Songs chart, with 13.3 million domestic streams. It fell to number 13 in its second week on the Hot 100, rebounding to number 12 in its third week following Grande's performance at the 2015 American Music Awards. By April 2018, "Focus" sold over 544,000 digital downloads in the US and was certified double Platinum by the RIAA. It debuted and peaked at number eight on the Canadian Hot 100, Grande's fifth Canadian top-ten single.