kW to kWh Calculator
Convert kilowatts (kW) to kilowatt-hours (kWh) by multiplying by time. Use this tool to estimate energy usage and electrical costs.
Understanding the Conversion from Kilowatts to Kilowatt-hours
Kilowatts (kW) and kilowatt-hours (kWh) are both essential units in the world of electricity, but they represent different concepts:
- kW (Kilowatt): A unit of power. It measures how fast energy is used or produced.
- kWh (Kilowatt-hour): A unit of energy. It measures how much energy is used over time.
Conversion Formula
To convert from kilowatts to kilowatt-hours, you use the following formula:
kWh = kW × Time (in hours)
Example Calculations
- 1 kW used for 1 hour = 1 kWh
- 2.5 kW used for 3 hours = 7.5 kWh
- 10 kW used for 24 hours = 240 kWh
Real-World Applications
The kW to kWh conversion is frequently used to:
- Calculate electricity bills
- Estimate generator run time and fuel consumption
- Size solar panel and battery storage systems
- Evaluate home appliance usage
Quick Reference Table
| Power (kW) | Time (Hours) | Energy (kWh) |
|---|---|---|
| 1 | 1 | 1 |
| 2 | 3 | 6 |
| 5 | 2 | 10 |
| 10 | 4 | 40 |
| 0.5 | 8 | 4 |
Difference Between kW and kWh
Think of kW as speed, and kWh as distance:
- kW: How fast you’re using power (like speed).
- kWh: How much energy you’ve consumed (like total distance).
Estimating Your Electricity Bill
To estimate your bill:
- Find out how many kWh you use per month (by summing your appliances or from your utility meter).
- Multiply the kWh by your electricity rate (usually in $/kWh).
- Example: 500 kWh × $0.15 = $75
FAQs
Can I convert kW to kWh without time?
No. You need a time duration to convert power to energy.
What is the relationship between kW and kWh?
kWh = kW × hours. Power over time equals energy.
Is kWh bigger than kW?
They measure different things. kWh measures quantity of energy, kW measures rate of use.
How much is 1 kWh worth?
It depends on your utility rate. In the U.S., it typically costs between $0.10–$0.25 per kWh.