Practical keeper tools
What does this equipment use?
Calculate energy charges from your own inputs. Rated power and assumed running time are not the same as measured consumption.
Enter your assumptions
The default example is fictional. Enter your own energy price and distinguish rated power from measured consumption.
Estimated energy: 7.2 kWh
Estimated energy charge: 1.44 currency units
Working: 10 W × 24 h/day × 30 days ÷ 1,000 = 7.2 kWh. Multiply by 0.2 per kWh.
Energy estimate only. A heater may cycle and a variable-speed device may draw a different amount. Use measured energy where available. This tool does not determine whether equipment should be changed or switched off.