kWh Calculator
Estimate the electricity cost of running an appliance.
Curious what an appliance is actually costing you to run? This estimates daily, monthly, and yearly electricity cost from wattage, hours of use, and your rate per kWh.
Finding your appliance's wattage
Check the appliance's label, manual, or a plug-in power meter for its actual wattage — many appliances list a range or a peak wattage that's higher than typical running wattage, so a direct measurement gives a more accurate cost estimate.
Frequently asked questions
Where do I find my electricity price per kWh?
Check your utility bill — it typically shows your rate directly, though some utilities use tiered or time-of-use pricing that varies by usage level or time of day.
Which appliances typically cost the most to run?
High-wattage appliances used for long periods — electric water heaters, HVAC systems, and clothes dryers — are typically the largest contributors to a home's electricity cost, far more than small electronics.