1. What is Watt-hours?

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 by time.

3. Importance of Watt-hours Calculation

Details: Calculating watt-hours helps estimate energy consumption, calculate electricity costs, and size battery systems appropriately.

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: What's the difference between watts and watt-hours?
A: Watts measure power (rate of energy use), while watt-hours measure energy (total consumption over time).

Q2: How do I convert watt-hours to kilowatt-hours?
A: Divide watt-hours by 1000 to get kilowatt-hours (kWh).

Q3: Can I use this for DC and AC power?
A: Yes, as long as you're using the correct power value (for AC, use real power in watts, not VA).

Q4: How accurate is this calculation?
A: It's perfectly accurate for constant power draw. For variable power, you'd need to calculate for each time segment.

Q5: What's a typical watt-hour consumption for household appliances?
A: A 60W bulb running for 5 hours uses 300Wh. A 1500W heater for 2 hours uses 3000Wh (3kWh).