1. What is Energy Consumption?

Energy consumption refers to the amount of electrical energy used by a device or system over a specific period. It is typically measured in watt-hours (Wh) or kilowatt-hours (kWh) and represents the total energy utilized.

2. How Does the Calculator Work?

The calculator uses the energy consumption formula:

Where:

• \( E \) — Energy consumption (Wh)
• \( P \) — Power (W)
• \( t \) — Time (hr)

Explanation: The formula calculates total energy consumption by multiplying the power rating of a device by the time it operates.

3. Importance of Energy Calculation

Details: Calculating energy consumption is essential for understanding electricity costs, energy efficiency, environmental impact, and proper electrical system design.

4. Using the Calculator

Tips: Enter power in watts (W) and time in hours (hr). Both values must be positive numbers. The result will be displayed in watt-hours (Wh).

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between watts and watt-hours?
A: Watts (W) measure power (rate of energy use), while watt-hours (Wh) 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). For example, 1000 Wh = 1 kWh.

Q3: Why is energy consumption important for households?
A: It helps track electricity usage, estimate utility bills, and identify energy-saving opportunities.

Q4: Can I use this for DC and AC devices?
A: Yes, the formula applies to both DC and AC devices as long as power is measured in watts.

Q5: How accurate is this calculation for real-world applications?
A: Very accurate for constant power devices. For variable power devices, average power should be used.