Quickly figure out your projected rod lift system displacement with this intuitive and easy to use wheel calculator. Modeled after a variety of hand-held physical wheel calculators this app is designed for quick calculation and reference of how differences between rod pump plunger size, strokes per minute and stroke length vary possible rod lift system displacement volumes. Whether in an office meeting where a rod lift technical question arises or on the well-site where a decision needs to be made quickly this can be a very useful quick reference tool.