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Power tools for homeowners
Plain-language calculators that answer the questions you actually have: what is driving my bill, what size generator do I need, and can my panel take one more big appliance.
Start here
Two tools answer most homeowner questions. Both are free and need no account.
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Electric Bill Analyzer
Analyze your electric bill to understand usage and find savings.
- ✓ Usage breakdown by category
- ✓ Compare to average homes
- ✓ Time-of-use comparison
- ✓ Personalized saving tips
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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
More free calculators
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Appliance Power
Calculate how much energy your appliances use and what they cost to run.
- Common appliance presets
- Custom power ratings
- Monthly cost estimates
- Energy usage breakdown
Try Calculator →
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EV Charging
Estimate the cost to charge your electric vehicle at home.
- Battery size calculator
- Charge level estimator
- EV vs gas comparison
- Monthly charging costs
Try Calculator →
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Solar Savings
Find out how much you can save with solar panels.
- Panel requirement calculator
- Savings estimates
- ROI calculations
- Sun hours by location
Try Calculator →
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Generator Costs
Calculate fuel costs for whole home generators and compare fuel types.
- Multiple fuel types
- Load level estimates
- Daily & weekly costs
- Fuel type comparison
Try Calculator →
Hiring an electrician for a panel upgrade, generator or EV charger? Bring your estimate. Their side of the site runs the full NEC calculation: see the contractor tools.