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Calculate your energy costs
Most electrical equipment has a nameplate or sticker giving the power rating in watts or kilowatts (1,000 watts = 1 kilowatt).
This simple formula will help you estimate the running costs of your equipment:
Watts ÷ 5 = daily cost
Example: 100 Watts ÷ 5 = 20 pence a day
Estimated running costs of some common appliances:
| Appliance | Estimated cost per day |
Estimated cost per quarter |
| 100 Watt desk lamp | 20p |
£18 |
| Desktop computer | 60p |
£54 |
| Drinks chill cabinet (single) | £1.50 |
£137 |
| Photocopier | £2.60 |
£237 |
| Convector heater (2000 watts) | £4.00 |
£364 |