1. What is a Watts per Hour to kWh Calculator?

Definition: This calculator converts power consumption in watts over time to energy in kilowatt-hours (kWh).

Purpose: It helps estimate electricity usage and costs for appliances and electrical systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( E_{kWh} \) — Energy in kilowatt-hours
• \( P_w \) — Power in watts
• \( t \) — Time in hours

Explanation: The power consumption (watts) is multiplied by time (hours) and divided by 1000 to convert to kWh.

3. Importance of Energy Calculation

Details: Understanding energy consumption helps in estimating electricity costs, sizing solar systems, and improving energy efficiency.

4. Using the Calculator

Tips: Enter the power consumption in watts and the operating time in hours. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why divide by 1000?
A: There are 1000 watts in a kilowatt, so we divide by 1000 to convert watt-hours to kilowatt-hours.

Q2: How do I find an appliance's wattage?
A: Check the label or specifications sheet, or use a wattage meter for accurate measurement.

Q3: Can I use this for multiple appliances?
A: Yes, calculate each appliance separately and sum the results for total kWh consumption.

Q4: How does this relate to my electricity bill?
A: Multiply the kWh result by your electricity rate (per kWh) to estimate cost.

Q5: What's the difference between watts and watt-hours?
A: Watts measure power (rate of energy use), watt-hours measure energy (power × time).