kW to kWh Calculator
Convert kilowatts to kilowatt-hours: turn a device's power draw in kW into the energy it uses over time. The key is that kW is power and kWh is energy: kWh = kW × hours. Enter the power and how long it runs to get the kWh (the unit your utility bills).
Energy = power × time: kWh = kW × hours. To go the other way, kW = kWh ÷ hours. kW is power (the rate); kWh is energy (what your utility bills).
Energy used
6 kWh
- Kilowatt-hours
- 6 kWh
- Watt-hours
- 6,000 Wh
- Megawatt-hours
- 0.006 MWh
kW to kWh conversion table
kWh = kW × hours. Each row is a power draw held for an hour, an 8-hour day, a full day and a 730-hour month. The last column prices one hour at the US average residential rate of 16.5¢/kWh.
| Power | 1 hour | 8 hours | 24 hours | 1 monthrunning 24/7 | Cost per hourUS average |
|---|---|---|---|---|---|
| 0.1 kW | 0.1 kWh | 0.8 kWh | 2.4 kWh | 73 kWh | $0.02 |
| 0.5 kW | 0.5 kWh | 4 kWh | 12 kWh | 365 kWh | $0.08 |
| 1 kW | 1 kWh | 8 kWh | 24 kWh | 730 kWh | $0.16 |
| 1.5 kW | 1.5 kWh | 12 kWh | 36 kWh | 1,095 kWh | $0.25 |
| 2 kW | 2 kWh | 16 kWh | 48 kWh | 1,460 kWh | $0.33 |
| 3 kW | 3 kWh | 24 kWh | 72 kWh | 2,190 kWh | $0.49 |
| 3.5 kW | 3.5 kWh | 28 kWh | 84 kWh | 2,555 kWh | $0.58 |
| 5 kW | 5 kWh | 40 kWh | 120 kWh | 3,650 kWh | $0.82 |
| 7.2 kW | 7.2 kWh | 57.6 kWh | 172.8 kWh | 5,256 kWh | $1.19 |
| 10 kW | 10 kWh | 80 kWh | 240 kWh | 7,300 kWh | $1.65 |
| 11.5 kW | 11.5 kWh | 92 kWh | 276 kWh | 8,395 kWh | $1.90 |
| 15 kW | 15 kWh | 120 kWh | 360 kWh | 10,950 kWh | $2.47 |
| 20 kW | 20 kWh | 160 kWh | 480 kWh | 14,600 kWh | $3.30 |
| 50 kW | 50 kWh | 400 kWh | 1,200 kWh | 36,500 kWh | $8.24 |
| 100 kW | 100 kWh | 800 kWh | 2,400 kWh | 73,000 kWh | $16.48 |
A 7.2 kW Level 2 EV charger running for 8 hours delivers 57.6 kWh. The monthly column assumes the load never switches off, which almost nothing in a house does. For a real appliance, set the hours it actually runs in the electricity cost calculator. Have kWh and want kW? kWh to kW divides instead.
Measure kilowatt-hours directly
Kilowatt-hours are what the utility bills, and converting to them means knowing the watts and the hours. A meter counts them instead. A plug-in energy meter measures one corded 120 V appliance; a whole-home monitor's sensors clip on inside the panel and log every circuit.
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Plug-in power meter
P3 International Kill A Watt P4400
Best for: Measuring what one plug-in appliance really uses
Whole-home energy monitor
Emporia Vue 3 Home Energy Monitor (16 circuit sensors)
Best for: Measuring hardwired and 240 V loads, or every circuit at once
Frequently asked questions
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Sources & standards
This tool's methodology and data follow US standards and authoritative public datasets: