1. What is an AC Electricity Consumption Calculator?

Definition: This calculator estimates the energy consumption of AC electrical devices in kilowatt-hours (kWh) based on their power rating and usage time.

Purpose: It helps homeowners and businesses estimate electricity usage and costs for better energy management.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The power consumption multiplied by usage time gives watt-hours, which is converted to kilowatt-hours by dividing by 1000.

3. Importance of Electricity 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. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Where can I find an appliance's power rating?
A: Check the manufacturer's label, specification sheet, or product manual. It's often listed in watts (W) or amps (A).

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

Q3: Does this work for DC devices too?
A: Yes, the calculation is the same for any electrical device as long as you have the power in watts.

Q4: What if my device shows amps instead of watts?
A: Multiply amps by voltage (usually 120V in US, 230V in EU) to get watts (P = I × V).

Q5: Should I use peak or average power consumption?
A: For accurate results, use average power consumption if the device has variable power draw.