1. What is kWh Energy Consumption?

A kilowatt-hour (kWh) is a unit of energy that represents the amount of electricity consumed by a device with a power rating of one kilowatt (1,000 watts) operating for one hour. It's the standard unit used by utility companies for billing purposes.

2. How Does the Calculator Work?

The calculator uses the energy consumption formula:

Where:

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

Explanation: The formula converts watt-hours to kilowatt-hours by dividing by 1,000, since 1 kilowatt equals 1,000 watts.

3. Importance of Energy Calculation

Details: Calculating energy consumption helps in estimating electricity costs, comparing appliance efficiency, and managing energy usage for cost savings and environmental impact.

4. Using the Calculator

Tips: Enter the device's power rating in watts and the duration of use in hours. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: How do I find my appliance's power rating?
A: Check the label or specifications on the device, usually listed in watts (W) or kilowatts (kW). 1 kW = 1,000 W.

Q2: What's the difference between watts and watt-hours?
A: Watts measure power (rate of energy use), while watt-hours measure energy (power × time).

Q3: How can I estimate my monthly electricity costs?
A: Multiply kWh by your electricity rate (cost per kWh) and by days used per month.

Q4: What's a typical kWh consumption for household appliances?
A: Varies widely - LED bulb: 0.01 kWh/hour, fridge: 1-2 kWh/day, AC: 3-5 kWh/hour.

Q5: Why divide by 1,000 in the formula?
A: To convert from watt-hours (small unit) to kilowatt-hours (standard billing unit).