The £1.2m summer signing from Aalborg has failed to find the net during his four appearances for the Villans this season.
Despite having a limited number of opportunities in the side, Helenius believes that he will start hitting the target sooner rather than later.
"The goals will come when they come," the Dane told Politiken. "I know that I can score if I get the chance, I am not worried about that.
"I have shown in training that I am a good finisher and they have told me that.
"I will get the chance when someone gets injured or one of the players play poorly in a number of matches and gets dropped."
Villa return to Premier League action on Saturday when they host Everton.