1. What is Annual Energy Consumption?

Definition: This calculator estimates the annual energy usage of an electrical device based on its power consumption.

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:

• \( E \) — Annual energy consumption (kWh)
• \( P \) — Power consumption (watts)
• 8760 — Number of hours in a year (365 days × 24 hours)
• 1000 — Conversion factor from watts to kilowatts

Explanation: The power consumption is multiplied by total hours in a year, then divided by 1000 to convert to kilowatt-hours.

3. Importance of Energy Consumption Calculation

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

4. Using the Calculator

Tips: Enter the power consumption in watts (typically found on appliance labels). The value must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why 8760 hours?
A: This represents continuous operation for a full year (365 days × 24 hours).

Q2: What if my device isn't running 24/7?
A: Adjust the calculation by multiplying by actual daily hours of use instead of 24.

Q3: How do I find my device's power consumption?
A: Check the label or manual, or use a watt meter for accurate measurement.

Q4: How can I estimate costs from this?
A: Multiply the result by your electricity rate (per kWh) from your utility bill.

Q5: What's a typical household appliance consumption?
A: For example: LED bulb (10W) = 87.6 kWh/year, Refrigerator (150W) = 1,314 kWh/year.