Electrical Load Calculator

Fill in the boxes about your home. As you type, it shows how big an electrical service (in amps) you likely need. Not sure about a box? Leave it, or type 0. Watts (W) are on the label or breaker of each appliance.

Your home

Measure size in

Living space above the ground (add up every floor, but not the basement)

m²

Heated basement space (only the part you heat; type 0 if you have none)

m²

Heating & coolingElectric heating (baseboards or an electric furnace; type 0 if you heat with gas)

Air conditioning (central A/C or a heat pump; type 0 if you have none)

My heating and A/C never run at the same time (true for most homes, so leave this checked)

KitchenElectric stove or oven (the kitchen range; type 0 if you have none or use gas)

Water heater, car charger & big appliancesTankless water heater, pool, hot tub or spa (type 0 if you have none)

Electric car charger (the home EV charger; type 0 if you have none)

My car charger is on an energy management system (EVEMS) (a device that pauses charging when the rest of the home is busy; if you have one, the code lets us leave the charger out of the service size)Other big appliances (add up anything over 1500 W: tank water heater, dryer, and so on)

Your current panelWhat size is your electrical panel now? (the number on your main breaker, or the sticker inside the panel door)

Planning to add?

Not sure of the exact watts? Check anything you are thinking of adding and we will use a typical size, then show how it changes your service.

A home car charger (a Level 2 EV charger, about 7,200 W)A hot tub or spa (about 11,500 W)An electric heat pump (about 9,600 W)

Recommended service size

200A

60A100A125A200A400A

0Calculated load (A)

0Calculated load (W)

Your panel0% loaded

Estimate only, to Rule 8-200(1) of the Canadian Electrical Code (CSA C22.1). This is not a stamped calculation. The final calculation must be done and stamped by a licensed electrician and verified with your local authority having jurisdiction (ESA in Ontario, Technical Safety BC, Alberta Municipal Affairs, and so on). Provincial amendments and code editions vary.

Electrical Load Calculator created by Get X Media