Home Energy
Costs,
Finally
Clear.
Estimate your electricity bill, solar payback, EV charging, and appliance running costs — instantly. Every formula shown. Every source cited.
Every calculator your home needs
24 tools across 6 categories — sized from a single bulb to a whole-home solar system.
Electricity
Bill calculator, kWh cost, appliance energy, and phantom load.
4 calculatorsHeating & Cooling
Heat pump vs furnace, AC cost, space heater, smart thermostat.
4 calculatorsSolar
Panel size, payback period, SEG export earnings, and UK grant eligibility.
4 calculatorsEV Charging
Home charging cost and Level 1 vs Level 2 charger comparison.
2 calculatorsAppliances
Fridge, water heater, dryer, washer, dishwasher, LED vs incandescent.
6 calculatorsInsulation & Windows
R-value, window heat loss, ceiling fan vs AC, pool pump, hot tub, generator.
6 calculatorsBuilt around trust, not traffic
We cite our sources, show our work, and never sell your data.
Every formula shown
We don't hide the math. Every calculator includes an expandable "How it's calculated" section with the exact formula and assumptions used.
Official sources only
Rate data from the EIA, Ofgem, Natural Resources Canada, and the Australian Energy Regulator — verified and updated quarterly.
No email. No paywall.
Results appear instantly in your browser. Calculator inputs never leave your device — we don't log them, store them, or sell them.
Popular calculators
Jump straight into the most-used tools.
kWh Cost Calculator
Calculate the exact cost of any electricity amount at your local rate.
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Electricity Bill Calculator
Full monthly bill estimate including fixed charges, tiered rates, and taxes.
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EV Home Charging Cost
Cost per mile, per charge, and per month for your electric vehicle.
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Solar Payback Calculator
Estimate how many years until your solar system pays for itself.
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Ready to see your real energy costs?
29 calculators. Instant results. No signup needed.