A brake wear measurement apparatus for use on a brake assembly equipped with a wear pin having a plunger slidably mounted in the plunger sleeve having a first end and second end and wherein when the brake wear measurement apparatus is placed over the wear pin, the wear pin contacts the plunger first end, and moves the plunger within the plunger sleeve to a retracted position corresponding to a retraction distance delta, and wherein the retraction distance delta corresponds to a wear pin exposed height indicating an amount of brake wear. A locking mechanism for locking the plunger in the retracted position may be provided. A brake wear correlation program whereby the input of a brake part number, a plunger retraction distance delta, and a number of performed landings will result in an output of an estimated number of remaining landings may also be provided.