Residential Electrical Load Calculator

This calculator is based on the Canadian Electrical Code (CEC) 2024, specifically Rule 8-200. It is provided for informational purposes only. No warranty is expressed or implied regarding the accuracy, reliability, or completeness of the information, formulas, or calculations generated by this tool. Always consult a licensed electrician for final calculations, design, and installation.

Basic & General Loads

Total Living Area

Rule 8-202(1)(a): 5000 W for first 90 m², +1000 W per additional 90 m² or part. If using ft², conversion uses 1 m² = 10.7639 ft².

Service Voltage (V)

Main Breaker Ampacity (A)

Enter the ampacity of the main service breaker (e.g., 100, 125, 200).

Air Conditioning Load (W)

Electric Space-Heating Load (W)

Air Conditioning and Heating are interlocked (use the greater load)

Major Appliance Loads

Electric Range/Stove Load (W)

Rule 8-202(1)(a)(v). Standard 6000 W assumed, plus 40% of any amount over 12 kW.

Electric Dryer Load (W)

If >1500 W, treated as an additional load and included in demand-factor calculations.

Electric Water Heater Load (W)

Enter the nameplate rating of the appliance.

Water Heater Type

Other Loads > 1500 W (e.g., Dishwasher, Microwave, Sauna) (W)

Comma-separated list. These loads are subject to a demand factor.

Electric Vehicle Charger (EVSE)

EV Charger Continuous Load (W)

Typical Level 2 chargers range 7.7–11.5 kW; enter the charger continuous wattage. Default is 0 W (no EVSE).

Using an Electric Vehicle Energy Management System (EVEMS)

Calculated Load

Total Calculated Load: 0 W

Calculated Amps: 0 A

Available Capacity: 0 A

Maximum Recommended EVSE Breaker: 0

Maximum Recommended Continuous EV Load: 0 W (0.00 A)

Breaker sizing: continuous load × 1.25 = breaker. Suggested breaker will not exceed the main breaker.