Everyday · Calculator
Electricity Cost Calculator
Calculate monthly electricity cost.
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Electricity Cost Calculator
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Estimate appliance running cost.
Formula
Cost = (W × h × 30 / 1000) × rateStep-by-step
- kWh = (W × h × 30) / 1000
- Cost = kWh × rate
Example
100W, 8h, $0.15 → $3.60/month.
FAQ
What is a kWh?+
Kilowatt-hour — 1000 watts for 1 hour.
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