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Residential Electrical Load Calculator

NEC Article 220 Part III / NEC Article 220 Part IV (220.82, 220.83)

Dwelling load calculation

Calculation method

Nominal voltage

Number of dwellings

Dwelling condition

Adding A/C or electric heat?

Multi dwelling unit

See NEC 220.84 for more information on calculating load for multi dwelling units.

Enter the total amount of equipment for the entire multifamily dwelling, not per individual dwelling unit.

Property address

Address

General load

Qty.

VA

Total

Structure

ft²

3

0

Added square footage

ft²

3

0

Small appliance circuits

1,500

3,000

Laundry circuits

1,500

Total: 4,500 VA

HVAC

Heating

Qty.

VA

Total

Electric space heater - 1,500 W (12.5A at 120V)

0

Furnace (Gas) - 1,200 W (10A at 120V)

0

Heat pump / Mini split - 6,000 W (25A at 240V)

0

Total: 0 VA

Cooling

Qty.

VA

Total

Air conditioner - 4,000 W (16.7A at 240V)

0

Total: 0 VA

Other electrical load

Qty.

VA

Total

Bath / laundry fan - 50 W (0.4A at 120V)

150

Dishwasher - 1,200 W (10A at 120V)

1,200

Disposal - 600 W (5A at 120V). < 0.75hp

600

Dryer - 5,000 W (20.8A at 240V)

5,000

Garage door opener - 300 W (2.5A at 120V). < 0.5hp

300

Microwave - 900 W (7.5A at 120V)

900

Pool pump - 1,800 W (15A at 120V). < 2.5hp

0

Range / Oven (Electric) - 8,000 W (33.3A at 240V)

0

Range / Oven (Gas) - 600 W (5A at 120V)

600

Range hood - 300 W (2.5A at 120V)

300

Refrigerator - 900 W (7.5A at 120V)

0

Spa/hot tub - 7,000 W (29.2A at 240V)

0

Sump pump - 200 W (1.7A at 120V) ~ 1/4 hp

0

Water heater (Electric) - 4,500 W (18.8A at 240V)

0

Total: 9,050 VA

EV charging

Qty.

VA

Total

EV charger - 9,600VA (32A at 240V x 125%)

9,600

Total: 9,600 VA

Generator sizing

Default values are from NEC Article 220 (2017-2023) and Article 120 (2026) "Branch-Circuit, Feeder and Service Load Calculations". The optional method is not offered on 3-phase services; use the standard method. This worksheet is for informational purposes only. The electrician must verify correctness and compliance with local regulations.

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Final calculation

First

VA

at

%

8,000 VA

First 8,000 VA for an existing dwelling (220.83). A new dwelling uses 10,000 VA.First 8,000 VA for an existing dwelling (220.83). A new dwelling uses 10,000 VA.

Remaining load at

%

2,220 VA

HVAC load

0 VA

EV charging multiplier

%

9,600 VA

Total calculated load

19,820 VA

Calculated amperage (load / 240V)

83 A

Service size

Leave blank if not needed

EXISTING

A

→

PROPOSED

A

Additional note (optional)

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