Appliance Running Cost
Power (Watts)
Hours per Day
Rate ($/kWh)
Appliance running cost calculators show how much electricity a device uses and costs based on wattage, hours of daily use, and local electricity price.
- 1kWh/day = Watts × Hours / 1,000
- 2Cost/day = kWh × Price per kWh
- 3Annual cost = Daily cost × 365
- 4Compare before and after to calculate savings from upgrades
2,000W electric heater, 4h/day, £0.28/kWh=Daily: 8kWh × £0.28 = £2.24; Annual: £817.60
| Appliance | Wattage | Annual cost |
|---|---|---|
| LED bulb | 9W | £3.68 |
| Laptop | 65W | £26.57 |
| Fridge (24h) | 150W | £366 |
| Dishwasher | 1,200W | £490 |
| Electric heater | 2,000W | £818 |
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