Planning Resource
Electrical Load Calculator
Estimate potential demand for EV chargers, panel upgrades, remodels, spas, ADUs, dedicated circuits, and light commercial tenant improvements.
Preliminary planning tool
Use this estimate to flag potential capacity constraints before detailed design.
Built for common upgrade scenarios
Covers EV charging, panel upgrades, remodels, spas, ADUs, and commercial TI planning.
Licensed review required
Final sizing and code decisions should always be validated by a licensed electrician.
Electrical Load Planning Tool
Preliminary planning estimate only — final service sizing requires licensed on-site review.
Inputs
Result
Preliminary estimate indicates projected demand may exceed current service capacity. Prompt licensed review is strongly recommended.
Service Capacity
200A
Existing Load
120.0A
Added Load
80.0A
Projected Total
200.0A
Remaining Capacity
0.0A
Utilization
100.0%
This calculator is for preliminary planning only. It is not a final electrical design, permit document, NEC determination, or guaranteed service-size recommendation. Final load calculations and service-sizing decisions should be reviewed by a licensed electrician based on site conditions, equipment specifications, and applicable code requirements.
How to use this calculator
- Set your existing service size and estimated current utilization.
- Add expected loads for EV charging, remodel scope, ADU plans, spa equipment, and dedicated circuits.
- Review projected utilization and remaining capacity as a preliminary planning signal.
What this estimate can and cannot tell you
- Can: Help flag whether your project may justify licensed service-capacity review.
- Cannot: Replace permit design, final NEC calculations, utility coordination, or inspection outcomes.
- Next step: Book a site visit for verified load calculations and upgrade options.
Related Services
Electrical Panel Upgrades
Evaluate whether existing service can support current and future demand.
EV Charger Installation
Estimate added load before selecting charger size and circuit requirements.
Remodel & Rewiring (incl. ADU)
Plan additional electrical demand for major renovations and ADU expansions.
Commercial Tenant Improvement
Use as an early checkpoint for TI scope and service capacity review needs.
Related Resources
Need a licensed load review?
Get a field-verified recommendation for your panel, circuits, and project scope.