Use our free online calculator to convert kilowatts (kW) to watt-hours (Wh) instantly. Accurate, fast, and ideal for energy analysis.
Quick Intro: Convert kW to Wh
The kW to Wh Calculator is a fast and accurate tool to convert kilowatts to watt-hours — two essential units used in measuring electrical energy over time. Kilowatts (kW) represent power, while watt-hours (Wh) represent the amount of energy used or produced over a specific duration. With just a few clicks, this tool provides instant results, helping you understand power consumption in solar systems, electric appliances, and energy management systems. Whether you’re sizing battery storage or calculating energy costs, this tool simplifies complex equations into easy inputs. Simply enter the kW value and operating hours, and receive the total Wh output instantly.
kW to Wh Calculator Overview
This calculator helps you quickly convert kilowatts (kW) to watt-hours (Wh) with precision. A kilowatt is a unit of power, while a watt-hour is a unit of energy. The basic formula used is:
Watt-hours (Wh) = Kilowatts (kW) × 1000 × Time (hours).
This is especially useful in applications involving solar power, electrical loads, battery backup systems, and home energy audits. For example, if a device runs at 2 kW for 3 hours, it consumes 2 × 1000 × 3 = 6000 Wh of energy.
By using this tool, homeowners can better understand electricity bills, engineers can calculate load demands, and students can visualize energy use. Just input the power in kilowatts and the duration in hours — the result in watt-hours is instantly calculated. This free converter supports both decimal and whole number inputs, with easy usability across devices.
Sample kW to Wh Canversion Table
| Kilowatts (kW) | Hours | Watt-Hours (Wh) |
|---|
| 0.5 | 1 | 500 |
| 1 | 2 | 2000 |
| 1.5 | 3 | 4500 |
| 2 | 4 | 8000 |
| 5 | 10 | 50000 |
What is the formula to convert kW to Wh?
Is kW the same as Wh?
No, kW measures power, Wh measures energy over time.
How many Wh are in 1 kW for 1 hour?
1 kW for 1 hour equals 1000 Wh.
Why convert kW to Wh?
To measure energy consumption or production over time.
Can I use this for solar panel calculations?
Yes, it's commonly used for sizing solar systems.
How do I convert 2.5 kW for 3 hours to Wh?
2.5 × 1000 × 3 = 7500 Wh.
Does this work for battery backup sizing?
Yes, it helps estimate battery capacity needed.
Is this calculator free to use?
Yes, it's completely free and instant.
What units should I input?
Input power in kilowatts and time in hours.
What’s the difference between Wh and kWh?
1000 Wh = 1 kWh, a common billing unit.
