🏡 Free Tools
Smart Home Tools
Free calculators to help you manage your home energy, electricity costs and battery backup — no signup required.
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Energy · Home
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Home Appliance Energy Calculator
Select your appliances and find out which ones cost you the most. Identify your biggest energy expense and reduce your bill.
20 AppliancesBuilt-in
Live CostReal-time
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Bills · Electricity
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Electricity Bill Calculator
Estimate your monthly and annual electricity bill with peak and off-peak pricing. Compare your usage against national averages.
9 MetricsCalculated
5 CountriesRate presets
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Battery · Backup
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Battery Backup Time Calculator
Calculate how long your UPS, power bank or solar battery will last. See which appliances you can run and for how long.
4 ModesUPS/Bank/Solar
ApplianceRun checker