Electrical

Field calculator workspace

Pick a trade, choose a calculator, and keep the active tool within easy reach. Results update as you enter field measurements.

Electrical

Demand / Service Load Calculator

Estimate a planning service load from floor area, required small-appliance/laundry circuits, fixed appliance loads, and voltage.

Finished floor area

sq ft

Small-appliance circuits

circuits

Laundry circuits

circuits

Fixed appliance load optional

Largest heat or A/C load optional

Service voltage

Results

Enter the required measurements to calculate results.

General lighting = area x 3 VA. Small-appliance and laundry circuits = 1,500 VA each. Demand = first 10,000 VA at 100% plus remainder at 40%, then add largest HVAC load. Amps = demand VA / volts.

Help

Planning aid only; final service sizing must follow the locally adopted electrical code.
Fixed appliance and HVAC loads should come from nameplates or verified documentation.