Electrical Load Calculator
Calculate total electrical service load per NEC Article 220. Determine the right service panel size for residential installations.
Total living area for general lighting load at 3 VA/sqft per NEC 220.12
NEC requires minimum 2 at 1,500 VA each — kitchen counter circuits
NEC 220.52(B) — 1,500 VA for the laundry circuit
Nameplate rating or 5,000 VA minimum per NEC 220.54
Nameplate rating — NEC Table 220.55 applies demand factors
Central AC compressor VA — NEC 220.60 uses larger of AC or heat
Total electric heating VA — only the larger of AC or heat counts per NEC 220.60
Hot water heater, pool pump, EV charger, shop equipment, etc.
Related Calculators
Calculate the correct circuit breaker size and wire pairing for a given load per NEC standards. Handles continuous, non-continuous, and motor loads.
Calculate the correct wire gauge for a circuit based on amps, distance, voltage, phase, and maximum voltage drop per NEC standards.
Calculate voltage drop for a given wire gauge, distance, and load. Shows voltage at the load and NEC compliance status.