1. What is Watts to kWh Conversion?

Definition: This calculator converts power in watts to energy in kilowatt-hours (kWh) based on usage time.

Purpose: It helps determine electrical energy consumption for devices or systems over time, useful for energy monitoring and cost calculations.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( E_{kWh} \) — Energy in kilowatt-hours
• \( P_w \) — Power in watts
• \( t \) — Time in hours

Explanation: The formula converts watts to kilowatts (by dividing by 1000) and multiplies by time to get energy consumption.

3. Importance of Energy Calculation

Details: Accurate energy calculations help estimate electricity costs, compare appliance efficiency, and manage energy budgets.

4. Using the Calculator

Tips: Enter the device's power consumption in watts and the operating time in hours. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why divide by 1000?
A: There are 1000 watts in a kilowatt, and utility companies bill in kilowatt-hours.

Q2: How do I find my device's wattage?
A: Check the device label, manual, or use a watt meter. Some devices list amps and volts (W = A × V).

Q3: Can I use minutes instead of hours?
A: Yes, but convert minutes to hours first (divide by 60).

Q4: What's the average power consumption for household items?
A: LED bulb: 10W, Laptop: 50W, Refrigerator: 100-400W, AC: 1000-5000W.

Q5: How can I estimate my electricity bill with this?
A: Multiply kWh result by your utility's rate per kWh.