Electricity Cost Calculator
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Watts (W)
Hours/Day
Rate ($/kWh)
An electricity cost calculator determines the running cost of any electrical appliance based on its wattage, daily usage hours, and the local electricity tariff in cents or pence per kWh.
- 1Energy (kWh) = Watts × Hours per Day ÷ 1,000
- 2Daily Cost = Energy (kWh) × Tariff Rate ($/kWh)
- 3Monthly Cost = Daily Cost × 30.44 days
- 4Annual Cost = Daily Cost × 365 days
100W TV, 5h/day, $0.30/kWh=Daily $0.15, Monthly $4.57, Annual $54.75
2,000W oven, 1h/day, $0.28/kWh=Daily $0.56, Annual $204.40
10W LED bulb, 8h/day, $0.25/kWh=Daily $0.02, Annual $7.30
| Appliance | Watts | Hours/Day | Annual Cost at $0.30/kWh |
|---|---|---|---|
| LED Bulb | 10W | 5 | $5.48 |
| Laptop | 65W | 8 | $56.94 |
| 55" TV | 120W | 4 | $52.56 |
| Fridge | 150W | 24 | $394.20 |
| Air Conditioner | 1,200W | 8 | $1,051.20 |
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