1. What is an Energy Consumption Calculator?

Definition: This calculator estimates the energy consumed by an electrical device based on its power rating and 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:

• \( E \) — Energy consumption (kilowatt-hours)
• \( P \) — Power consumption (watts)
• \( t \) — Usage time (hours)

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

3. Importance of Energy Consumption Calculation

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

4. Using the Calculator

Tips: Enter the device'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 device, user manual, or manufacturer's specifications (often listed in watts or kW).

Q2: How do I calculate daily energy use?
A: Multiply the power by hours used per day, then divide by 1000 to get daily kWh consumption.

Q3: How can I estimate my electricity bill?
A: Multiply the kWh result by your electricity rate (cost per kWh from your utility company).

Q4: What's the difference between watts and kilowatts?
A: 1 kilowatt = 1000 watts. Electricity bills typically charge per kilowatt-hour (kWh).

Q5: Does this work for devices with variable power?
A: For devices that cycle on/off (like refrigerators), use average power or look for "energy guide" labels.