The Load Calculator automates NEC Article 220 load calculations for residential and commercial projects. Enter your property details and appliance loads. Get demand factors, total load, and panel capacity answers without the manual math.
Run A Load Calculation
Everything you need to run a proper load calc, built into one tool that follows the national code.
Enter your loads and the calculator applies the right NEC demand factors for you.
A load calc that used to take 10-20 minutes by hand now takes a few minutes max.
Handles both residential and commercial projects. One tool covers every job.
See right away whether the existing panel can handle the load or if you need an upgrade.
You are at a customer's house and they want to add a EV charger. Open the Load Calculator on your phone, punch in the existing loads and the new ones, and know in minutes whether their current panel can handle it or needs an upgrade. Give the customer a straight answer before you leave the driveway.
No more juggling Excel templates or paying for clunky desktop programs that only run on one computer. The Load Calculator works where ever you do. It is always up to date, and you can use it from any device.
A digital replacement for the kitchen-table spreadsheet. Enter property details and loads. The calculator applies the right NEC Article 220 demand factors and tells you the total load, the panel capacity needed, and whether the existing service can handle the job.
Yes. The calculator tracks NEC Article 220 in the 2023 edition. Every calc shows its inputs and the demand factor it applied so you can verify the math before signing off.
Yes. Residential and light commercial. One tool covers both, whether that's a 200A residential service upgrade or a tenant fit-out branch panel.
A few minutes, max. A calc that used to take 10–20 minutes by hand or 35 minutes at the kitchen table runs in under five with the loads already in front of you.
Yes. The calculator runs in any browser. Phone in the truck, tablet on the jobsite, laptop at the desk. Same calc, same answer, regardless of device.
Yes. Export a clean PDF of the calc: inputs, demand factors, totals, panel-capacity answer. Hand it to the homeowner, attach it to a permit, or drop it in the job folder.