Residential use only: For residential electrical load calculations only — NEC Article 220. Not for commercial or multi-family use.
MIT License: This tool is provided AS-IS, without warranty of any kind. You are solely responsible for all calculations and compliance with your local code. Use at your own risk.
MIT License: This tool is provided AS-IS, without warranty of any kind. You are solely responsible for all calculations and compliance with your local code. Use at your own risk.
Project Information
Auto-detected from state selection. Change only if your AHJ uses a different adoption.
Code adoption varies by AHJ. Always verify the applicable edition with your local building department. Auto-detection is based on state-level adoption data as of May 2026 and may not reflect local amendments.
Building & Service Parameters
General lighting = sq ft × 3 VA (NEC Tbl 220.12)
NEC 210.11(C)(1)
NEC 210.11(C)(2)
Calculation Method
Fixed Appliances
Set Qty to 0 to exclude an appliance, or 1+ to include it. Rating (VA) and voltage are pre-filled with typical values — adjust to match nameplate data.
Description
VA
Voltage
Qty
Demand Factor
Note
HVAC Loads
Only the largest heating or cooling load is counted per NEC 220.60. Set qty to 0 to exclude. No electric HVAC? Leave all quantities at 0 — the section is excluded from the calculation.
Description
VA
Voltage
Qty
Demand Factor
Note
Special Loads
EV chargers, spas, pools, and other special loads use individual demand factors. Solar PV produces a negative offset reducing the total. Set qty to 0 to exclude.
Description
VA
Voltage
Qty
Demand Factor
Note
Custom Loads
Add any load not covered above. Enter description, VA rating, voltage, quantity, and a demand factor (1.0 = full load; enter 0.75 for 75%, etc.).
Description
VA
Voltage
Qty
Demand Factor
Note
📋
Complete inputs and click Calculate Load to generate the report.
Panel Configuration
Circuit Schedule
| # | Type | Description — Left Bus | A | VA | # | Type | Description — Right Bus | A | VA |
|---|