Power factor (PF) ndi chiŵerengero cha mphamvu yogwira ntchito, yoyesedwa mu kilowati (kW), ku mphamvu yowonekera, yoyesedwa mu kilovolti amperes (kVA). Mphamvu zowonekera, zomwe zimadziwikanso kuti kufunikira, ndi muyeso wa kuchuluka kwa mphamvu zomwe zimagwiritsidwa ntchito poyendetsa makina ndi zida panthawi inayake. Imapezeka pochulukitsa (kVA = V x A)