1. What is an Energy Usage Calculator?

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

Purpose: It helps individuals and businesses understand their electricity consumption and estimate energy costs.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( E \) — Energy consumption (kilowatt-hours)
• \( P \) — Power consumption (watts)
• \( t \) — Time of usage (hours)

Explanation: The power consumption is multiplied by usage time and divided by 1000 to convert watt-hours to kilowatt-hours.

3. Importance of Energy Calculation

Details: Understanding energy usage helps in budgeting electricity costs, identifying energy-hungry appliances, and making energy-efficient choices.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: Where can I find an appliance's power rating?
A: Check the label, manual, or specifications sheet. Alternatively, use a wattmeter to measure actual consumption.

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

Q3: What's the difference between watts and kilowatts?
A: 1 kilowatt = 1000 watts. Electricity is typically billed per kilowatt-hour.

Q4: Can I use this for multiple appliances?
A: Calculate each appliance separately and sum the results for total energy usage.

Q5: Does this account for standby power?
A: No, this calculates active usage only. Many appliances consume power even when "off."