1. What is a W to kWh Calculator?

Definition: This calculator converts power in watts to energy in kilowatt-hours based on usage time.

Purpose: It helps determine electrical energy consumption for devices or systems based on their power rating and operating duration.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• kWh — Energy in kilowatt-hours
• W — Power in watts
• t — Time in hours

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

3. Importance of Energy Calculation

Details: Accurate energy calculations help estimate electricity costs, size solar power systems, and understand appliance energy consumption.

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: We divide by 1000 to convert watt-hours to kilowatt-hours (1 kWh = 1000 Wh).

Q2: Can I use this for multiple devices?
A: Yes, calculate each device separately and sum the results for total consumption.

Q3: How accurate is this calculation?
A: It's accurate for constant loads. For variable loads, use average power over time.

Q4: How does this relate to my electricity bill?
A: Electricity is typically billed per kWh. Multiply result by your utility's kWh rate to estimate cost.

Q5: What's the difference between W and kWh?
A: Watts measure power (rate of energy use), kWh measures energy (power × time).