1. What is Energy Usage Calculator?

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

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

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( E \) — Energy in kilowatt-hours (kWh)
• \( P \) — Power consumption in watts (W)
• \( t \) — Time in hours (h)

Explanation: The formula converts watt-hours to kilowatt-hours by dividing by 1000 (1 kWh = 1000 Wh).

3. Importance of Energy Calculation

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

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. Typical ratings: LED bulb (10W), laptop (50W), refrigerator (150W).

Q2: How do I calculate monthly energy usage?
A: Multiply daily kWh by 30, or calculate for each appliance and sum them up.

Q3: How does this relate to my electricity bill?
A: Multiply kWh by your electricity rate (e.g., $0.12/kWh) to estimate cost.

Q4: What's the difference between watts and kilowatts?
A: 1 kilowatt (kW) = 1000 watts (W). Electricity bills typically use kWh.

Q5: Can I use this for multiple appliances?
A: Calculate each separately and sum the results for total consumption.