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kWh Energy Cost Calculator

Calculate the running cost of a device.

Power

W

Hours per day

Price per kWh

$

Result

Monthly cost: $22.50
Daily cost: $0.75

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Free to use — no signup required.

FAQ

How is energy cost calculated?: kW × hours × price per kWh. A 1000 W device for 5 h/day at $0.15 ≈ $0.75/day.

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