kWh to Watts Calculator
Convert kilowatt-hours (kWh) to watts to find the power consumption of devices from your energy bill. Determine how many watts your appliances draw based on energy usage data.
kWh
hours
POWER
1,500 W
KILOWATTS
1.5 kW
EST. COST (US AVG)
$1.92
FORMULA
P = (kWhร1000)/h
kWh to Watts โ Reference Table
| kWh | 1 hr | 4 hrs | 8 hrs | 24 hrs |
|---|---|---|---|---|
| 0.5 kWh | 500 W | 125 W | 63 W | 21 W |
| 1 kWh | 1,000 W | 250 W | 125 W | 42 W |
| 2 kWh | 2,000 W | 500 W | 250 W | 83 W |
| 3 kWh | 3,000 W | 750 W | 375 W | 125 W |
| 5 kWh | 5,000 W | 1,250 W | 625 W | 208 W |
| 8 kWh | 8,000 W | 2,000 W | 1,000 W | 333 W |
| 10 kWh | 10,000 W | 2,500 W | 1,250 W | 417 W |
| 12 kWh | 12,000 W | 3,000 W | 1,500 W | 500 W |
| 15 kWh | 15,000 W | 3,750 W | 1,875 W | 625 W |
| 20 kWh | 20,000 W | 5,000 W | 2,500 W | 833 W |
| 30 kWh | 30,000 W | 7,500 W | 3,750 W | 1,250 W |
| 50 kWh | 50,000 W | 12,500 W | 6,250 W | 2,083 W |
* Cost estimated at US national average of $0.16/kWh (EIA, 2024). Actual rates vary by state.
๐ก How to Convert kWh to Watts
Converting kWh to watts is the reverse of the watts-to-kWh calculation. It helps you determine the power draw (wattage) of a device when you know how much energy it consumed over a specific time period. This is useful for analyzing your electricity bill or comparing appliance efficiency.
kWh to Watts Formula
P = (E ร 1,000) / t
Where:
P = Power in watts (W)
E = Energy in kilowatt-hours (kWh)
t = Time in hours (h)
Where:
P = Power in watts (W)
E = Energy in kilowatt-hours (kWh)
t = Time in hours (h)
Example: Reading Your Electricity Bill
Your meter shows 12 kWh used over 8 hours:
P = (12 ร 1,000) / 8 = 1,500 watts
This tells you the average power draw was 1,500W โ equivalent to running a space heater.
P = (12 ร 1,000) / 8 = 1,500 watts
This tells you the average power draw was 1,500W โ equivalent to running a space heater.
Understanding Your Electricity Bill
US electricity bills show consumption in kWh. Here's how to interpret common readings:
| Monthly kWh | Average kW Draw | Cost (US Avg) | Comparable To |
|---|---|---|---|
| 300 kWh | 0.42 kW | $48 | Efficient apartment |
| 600 kWh | 0.83 kW | $96 | Small home, mild climate |
| 886 kWh | 1.23 kW | $142 | US average household |
| 1,200 kWh | 1.67 kW | $192 | Large home, hot climate |
| 2,000 kWh | 2.78 kW | $320 | Very large home, electric heating |
References
- U.S. Energy Information Administration (EIA) โ Residential Electricity Data, 2024
- ENERGY STAR โ Home Energy Assessment Guidelines
12 kWh over 8 hours = 1,500 watts average power draw. The US average household uses 886 kWh/month, or about 1.23 kW continuous average draw.