What are the different types of calipers available? Calipers are wonderfully simple tools used to measure the distance between two points on a part or object. Depending on the work piece, you might need to measure an interior distance, an exterior distance, a depth distance, or the distance from the side of the object to a particular point. All of these types of measurements can be accomplished using calipers. Overall, there are eight different caliper types today. The available varieties of caliper are the Vernier caliper, the dial caliper, the digital caliper, the inside caliper, the outside caliper, the divider caliper, the oddleg caliper, and the micrometer caliper. In fact, the micrometer caliper is the same tool as a micrometer, but using the full name.