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:

• \( Wh \) — Watt-hours (energy)
• \( P \) — Power in watts (W)
• \( h \) — Time in hours

Explanation: The formula shows the direct relationship between power, time, and energy consumption.

3. Importance of Watt Hour Calculation

Details: Calculating watt-hours helps in understanding energy consumption, estimating electricity costs, and sizing battery systems for various applications.

4. Using the Calculator

Tips: Enter power in watts and time in hours. Both values must be positive numbers. The calculator will compute the energy consumption in watt-hours.

5. Frequently Asked Questions (FAQ)

Q1: How is watt-hour different from watt?
A: Watt measures power (energy per unit time), while watt-hour measures energy (power × 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 much energy it can store and deliver.

Q4: Can I convert watt-hours to joules?
A: Yes, 1 watt-hour = 3,600 joules (since 1 watt = 1 joule/second).

Q5: How does this relate to electricity bills?
A: Electricity is typically billed per kilowatt-hour, so knowing watt-hours helps estimate costs.