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Power & Energy Cost Calculator
Enter power, hours per day and your kWh price โ running cost updates instantly.
Formula
kWh = W รท 1000 ร hours | cost = kWh ร price
Typical Appliance Wattage
| Appliance | W |
|---|---|
| LED bulb | 10 |
| Laptop | 60 |
| Refrigerator | 150 |
| Microwave | 1200 |
| Space heater | 1500 |
FAQ
What is a kWh?
The energy of 1000 W running for one hour โ the unit on your electricity bill. 1 kWh = 3.6 MJ.
Do fridges run 24 h at rated power?
No โ the compressor cycles. Use the rated watts with an effective 8โ12 h/day for a realistic estimate.