1. What is Watt-Hour?

A watt-hour (Wh) is a unit of energy equivalent to one watt (1 W) of power expended for one hour (1 h) of time. It's commonly used to measure electrical energy consumption.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• \( Wh \) — Energy in watt-hours
• \( P \) — Power in watts
• \( h \) — Time in hours

Explanation: The formula calculates total energy consumption by multiplying power (rate of energy use) by time.

3. Practical Applications

Details: Watt-hours are used to calculate electricity bills, estimate battery life, and compare energy efficiency of appliances.

4. Using the Calculator

Tips: Enter power in watts and time in hours. Both values must be positive numbers. The result shows total energy consumption.

5. Frequently Asked Questions (FAQ)

Q1: How many watt-hours are in a kilowatt-hour?
A: 1 kilowatt-hour (kWh) = 1000 watt-hours (Wh).

Q2: How do I convert watt-hours to joules?
A: 1 Wh = 3600 joules (since 1 watt = 1 joule/second).

Q3: Why is watt-hour used instead of just watts?
A: Watts measure power (rate), while watt-hours measure total energy consumed over time.

Q4: How accurate is this calculation for real-world devices?
A: It's accurate for constant power draw. For variable power, you'd need to calculate for each power level and sum the results.

Q5: Can I use this for solar panel calculations?
A: Yes, it can help estimate daily energy production by multiplying panel wattage by peak sun hours.