A per-unit calculator for power system engineers. Convert voltage, current, and impedance to and from per-unit on any MVA/kV base, change an impedance (R, X, or Z) between equipment and study bases, and estimate three-phase fault levels — all for balanced three-phase systems.
Enter your base power and voltage to get base current and impedance, convert nameplate values across bases, and check fault duty in per-unit, MVA, and kA. New to the method? See our guide to the per-unit system for the full explanation, or use the Learn tab inside the tool for a quick refresher.
