1 On front teeth, the average root canal can cost anywhere from $450 to as much as $1,300. 2  This cost will greatly vary depending on the expertise of the dentist and the complexity of the problem. 3  A root canal performed in the middle of the mouth can cost anywhere from $500 to as much as $1,600. A root canal performed in the middle of the mouth can cost anywhere from $500 to as much as $1,600. 2  For back molars, the costs can vary anywhere from $700 to as much as $1,700.