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 equation:

Where:

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

Explanation: The equation calculates the total energy consumed by multiplying power by time.

3. Importance of Watt-hour Calculation

Details: Calculating watt-hours helps in understanding energy consumption, estimating electricity costs, and designing battery systems.

4. Using the Calculator

Tips: Enter power in watts and time in hours. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: How is watt-hour different from watt?
A: Watt measures power (rate of energy use), while watt-hour measures energy (total consumption over time).

Q2: How many watt-hours are in a kilowatt-hour?
A: 1 kilowatt-hour (kWh) = 1,000 watt-hours (Wh).

Q3: Why is watt-hour important for batteries?
A: Battery capacity is often rated in watt-hours, indicating how long it can power a device.

Q4: Can I calculate watt-hours from volts and amps?
A: Yes, first calculate watts (P = V × I), then multiply by hours.

Q5: How accurate is this calculation?
A: It's accurate for constant power draw. For variable power, you'd need to integrate power over time.