kW to kWh Calculator
Convert power consumption in Kilowatts (kW) to energy in Kilowatt-hours (kWh).
How to Convert kW to kWh
Kilowatt (kW) is a unit of power, representing the rate at which energy is used.
Kilowatt-hour (kWh) is a unit of energy, representing the total amount of energy used over time.
You can calculate kilowatt-hours from kilowatts and hours, but you cannot convert kilowatts directly to kilowatt-hours as they measure different physical quantities (Power vs Energy).
kW to kWh Formula
Energy (in kWh) is equal to Power (in kW) multiplied by Time (in hours).
Calculation Example
Question: A 1.5 kW air conditioner runs for 8 hours. How much energy does it use?
Answer:
E = 1.5 kW × 8 h = 12 kWh
Typical Appliance Energy Usage
Average power ratings for common household appliances:
| Appliance | Power (Watts) | Power (kW) |
|---|---|---|
| LED Light Bulb | 10 W | 0.01 kW |
| Laptop Computer | 50 W | 0.05 kW |
| Refrigerator | 150 - 400 W | 0.15 - 0.4 kW |
| Microwave | 1000 W | 1.0 kW |
| Central Air Conditioner | 3500 W | 3.5 kW |
kW to kWh Conversion Table
Energy consumption for various power levels over different time periods.
| Power (kW) | Time (1 Hour) | Time (8 Hours) | Time (24 Hours) |
|---|---|---|---|
| 0.5 kW | 0.5 kWh | 4 kWh | 12 kWh |
| 1 kW | 1 kWh | 8 kWh | 24 kWh |
| 2 kW | 2 kWh | 16 kWh | 48 kWh |
| 3 kW | 3 kWh | 24 kWh | 72 kWh |
| 4 kW | 4 kWh | 32 kWh | 96 kWh |
| 5 kW | 5 kWh | 40 kWh | 120 kWh |
| 10 kW | 10 kWh | 80 kWh | 240 kWh |