1. What is kWh?

A kilowatt-hour (kWh) is a unit of energy that represents the amount of electricity consumed over time. It's the standard unit used by utility companies for billing purposes.

2. How Does the Calculator Work?

The calculator uses the kWh formula:

Where:

• Power — The rate of energy consumption in Watts (W)
• Time — The duration of usage in hours (hr)
• 1000 — Conversion factor from Watts to kilowatts

Explanation: The formula converts power consumption over time from watt-hours to kilowatt-hours by dividing by 1000.

3. Importance of kWh Calculation

Details: Calculating kWh helps estimate electricity costs, compare appliance efficiency, and understand energy consumption patterns.

4. Using the Calculator

Tips: Enter power in Watts and time in hours. For multiple appliances, calculate each separately and sum the results.

5. Frequently Asked Questions (FAQ)

Q1: How do I find an appliance's power rating?
A: Check the label or manual for Watts (W) or Amps (A). For Amps, multiply by voltage (usually 120V in US) to get Watts.

Q2: What's the difference between kW and kWh?
A: kW measures power (rate of energy use), while kWh measures energy (power × time).

Q3: How can I reduce my kWh consumption?
A: Use energy-efficient appliances, turn off unused devices, and optimize usage during off-peak hours.

Q4: How accurate is this calculation?
A: It provides a good estimate for constant power devices. For variable power devices, more complex measurements are needed.

Q5: How do I convert kWh to cost?
A: Multiply kWh by your electricity rate (found on your utility bill, typically $0.10-$0.30 per kWh).