Watts to kWh Converter
Free watts to kwh converter. All prices are editable estimates, your local rates may differ.
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How to calculate
Formula: kWh = watts ÷ 1,000 × hours. Cost = kWh × rate.
Worked example: 1,000 watts, 5 hours, rate $0.17 per kWh. Energy = 5.00 kWh, cost = $0.85.
Tips
1,000 watts running for 1 hour uses 1 kWh. That is the simplest way to check any appliance, before you add days or months.
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Frequently asked questions
Are the prices accurate?
Prices are editable estimates. The defaults are typical US figures, and your local price can be higher or lower.