A
- Active hours per year
- 728 h
- Standby hours per year
- 8,032 h
- Power while in use
1,000 W ÷ 1000 × 728 h = 728 kWh - Standby power
0 W ÷ 1000 × 8,032 h = 0 kWh - Annual energy
728 + 0 = 728 kWh - Annual cost
728 kWh × 0.25 €/kWh = €182.00
Product guide
Use cases
Free electricity consumption calculator by use, month and year, with standby cost, comparison and downloadable CSV. Use the same usage pattern to see which device consumes less energy and costs less.
Practical example
- 01
Estimate the cost of an appliance.
- 02
Compare two devices
- 03
Detect when standby has an impact.
Practical example · Standby power
- Hours per use
- 2 h
- Uses per week
- 7
- Electricity price
- 0.25 €/kWh
How your annual cost is calculated
Two hours per use, seven uses per week. These are example values, separate from your inputs.
Watts (W) measure power; kilowatt-hours (kWh) measure energy. Use a representative average power when a heater or compressor cycles on and off.
The calculation uses 52 weeks and caps active use at 8760 hours per year. Remaining hours count as standby. If you unplug the device, enter 0 W for standby.
The price is multiplied by energy use. This estimate excludes fixed charges and bill items not included in your price per kWh.
B
- Active hours per year
- 728 h
- Standby hours per year
- 8,032 h
- Power while in use
1,000 W ÷ 1000 × 728 h = 728 kWh - Standby power
5 W ÷ 1000 × 8,032 h = 40.16 kWh - Annual energy
728 + 40.16 = 768.16 kWh - Annual cost
768.16 kWh × 0.25 €/kWh = €192.04
Worked example with no standby consumption
Two hours per use, seven uses per week. These are example values, separate from your inputs.
Responsible scope
Sources and scope
Power and price are user inputs; They are not presented as an energy label or current rate.