For education and planning only — mains electricity can kill. This tool gives approximate, general-purpose estimates using common reference standards. It is not a substitute for a qualified/licensed electrician, an official load calculation, or your local electrical code and inspection process.

Never work on a live circuit. Always isolate the circuit at the main panel, lock out/tag out, and verify it is dead with a proven voltage tester before touching any wiring. Most jurisdictions legally require a licensed electrician and/or a permit and inspection for panel, circuit and service work — check your local rules before starting. When in doubt, hire a professional.