The price of an electric knife varies based upon its features; additional attachments, safety switch, case, ergonomic handle and storage. Warranty length is also a determining factor in the price of an electric knife, with a three-year warranty knife costing more than a one-year warranty knife.
The primary influence on the price of an electric knife is its included attachments. When only a single blade is included, an electric knife can cost approximately $12, as of February 2015. Add an additional attachment and a carrying case for the knife and the price can rise nearly 50 percent. Ergonomic handles and additional amenities such as a rack or stand to store attachments, cord storage and blade storage further increase the price of a premium electric knife.
The quality of the motor that drives the electric knife is also a major factor in the knife's price. A stronger motor works harder, requiring a robust housing and a larger handle in most cases. A better motor makes it easier for the electric knife to cut without additional force from the user. Higher quality motors also last longer than weaker, less-efficient motors. As a result, electric knives with better motors often have longer warranties.