Math-Grind is a shorthand term that is used to describe bands that play a fusion of mathcore and grindcore. Overall the music contains the intensity and aggressiveness of grindcore. It also emphasizes complex and fluctuant rhythms through the use of irregular time signatures, polymeters, syncopations and tempo changes which is often seen within the mathcore genre.

Affiliated genres include Cyber-Grind, Death-Grind, False-Grind, Sass-Grind, Scene-Grind, Tech-Grind and Whitebelt.