1. What is a Power Consumption Calculator?

Definition: This calculator estimates the energy consumption in kilowatt-hours based on the power rating of an appliance and its usage time.

Purpose: It helps homeowners and businesses understand their electricity usage and estimate energy costs.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( E_{kWh} \) — Energy consumption (kilowatt-hours)
• \( P_w \) — Power rating (watts)
• \( t \) — Time of usage (hours)

Explanation: The power in watts is multiplied by time in hours, then divided by 1000 to convert to kilowatt-hours.

3. Importance of Power Consumption Calculation

Details: Understanding energy usage helps in budgeting electricity costs, comparing appliance efficiency, and reducing energy waste.

4. Using the Calculator

Tips: Enter the appliance's power rating in watts and the duration of use in hours. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Where can I find an appliance's power rating?
A: Check the label on the appliance, manual, or manufacturer's specifications. It's often listed in watts (W) or kilowatts (kW).

Q2: How can I estimate my electricity cost from this?
A: Multiply the result by your electricity rate (per kWh) from your utility bill.

Q3: What's the difference between watts and kilowatt-hours?
A: Watts measure power (rate of energy use), while kilowatt-hours measure energy (power × time).

Q4: Can I use this for devices with variable power?
A: For devices like refrigerators that cycle on/off, use average power consumption instead of peak power.

Q5: How accurate is this calculation?
A: It provides theoretical consumption. Actual usage may vary based on efficiency, power fluctuations, and operating conditions.