Secondary suites
Estimate the combined service demand for the main dwelling and suite before permit review.
Calgary permit planning tool
Free Electrical Load Calculator for Calgary Permit Planning
Estimate whether your existing electrical service can support a secondary suite, laneway suite, EV charger, hot tub, tankless water heater, or major appliance before you apply for a permit.
Built for Calgary residential load-calculation workflows using Canadian Electrical Code demand rules and 75°C conductor sizing.
High-intent Calgary projects
Know your service capacity before the inspector asks.
Laneway suites
Check whether the existing service can carry the added dwelling load.
EV chargers
See how an EVSE affects your calculated demand and whether load management may be needed.
Hot tubs and spas
Count the full nameplate load and understand the impact before installation.
What the calculator checks
Transparent residential electrical load calculation math.
The calculator shows the demand factors behind the final service load so the result is easier to trust, explain, and review before a Calgary electrical permit or service upgrade decision.
- Basic dwelling area load
- Secondary suite and laneway suite demand factors
- EV charging equipment at 100%
- Range, tankless water heater, hot tub, and additional loads
- Heating and cooling interlock handling
- Service OCP and 75°C conductor sizing
Built for searches like yours
Use it when you are looking for a Calgary electrical load calculator.
This tool is intended for homeowners, builders, designers, and electrical contractors checking residential service capacity before adding new electrical loads.
electrical load calculator
Calgary load calculation
secondary suite load calculation
EV charger load calculation
hot tub electrical load
100 amp service capacity
Need sign-off or help?
Run the free calculator, then request a master electrician review.
If the result is close, confusing, or needed for permit planning, Real World Electric can review the calculation and next steps.
Common questions
Calgary electrical load calculation FAQ
Is this only for secondary suites?
No. It is also useful for laneway suites, EV chargers, hot tubs, tankless water heaters, ranges, air conditioning, and other service-capacity checks.
Is the electrical load calculator free?
Yes. You can run the calculator for free. If you need help interpreting the result or preparing for permit review, Real World Electric can review the calculation.
Does the calculator replace a permit submission?
No. It helps you estimate and document the electrical load. Permit requirements and final acceptance still depend on the authority having jurisdiction and project details.
What if my result is above my current service size?
You may need load management, a service upgrade, revised equipment choices, or a master electrician review before proceeding.