NEC 2023 load calculations you can hand to an inspector
The Contractor Load Calculator runs the full Article 220 standard method and the 220.82 optional method on the same dwelling, shows every line item with its clause, and exports a permit-ready PDF.
Pro is $15/month after the trial. The load calculator requires a Pro account.
Standard and optional methods side by side
Run Article 220 Part III and the 220.82 optional method on the same dwelling and see which one sizes the service smaller, with the difference in VA and amps. Most calculators only do one.
Every line item carries its clause
Table 220.45 lighting demand, 220.53 fixed appliances, Table 220.54 dryers, Table 220.55 cooking with Notes 1 to 3, 220.60 noncoincident loads, 430.24 largest motor. The basis is written out on each row.
Permit-ready PDF
Dwelling inputs, per-clause line items, the method comparison, service sizing with a future-load allowance, and the reviewer disclaimer on every page.
Saved scenarios and projects
Keep each job’s calculation, compare alternatives for the same property, and reload a scenario when the scope changes.
What the calculator covers
Inputs match how a dwelling is actually described on a job.
Dwelling
Floor area per 220.41 including the attached garage, small-appliance and laundry circuits, service voltage.
Appliances
Fastened-in-place appliances by nameplate, ranges and ovens by rating with correct Table 220.55 column selection, dryers with the 5,000 VA floor.
Heating, cooling, motors
Resistance heat by controlled units, heat pumps with supplemental heat and interlock, A/C nameplate, largest-motor adder, continuous loads.
Free tools for the truck
Quick answers for customers, no login.
Generator Cost Calculator
Calculate fuel costs for whole home generators and compare fuel types.
- Multiple fuel types
- Load level estimates
- Daily & weekly costs
- Fuel type comparison
Home Electrical Load Estimator
Find out how much electrical service your home needs and what size standby generator would cover it.
- Simplified NEC 220.82 optional method
- Calculated load in amps
- Minimum service size
- Standby generator sizing
Try it on your next service upgrade
30 days free, cancel anytime during the trial.
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