1. What is the kWh Calculation?

The kilowatt-hour (kWh) calculation measures electrical energy consumption by multiplying power in watts by time in hours and dividing by 1000. It's the standard unit used by utility companies for billing.

2. How Does the Calculator Work?

The calculator uses the power consumption formula:

Where:

• \( kWh \) — Kilowatt-hours (energy consumed)
• \( P \) — Power in watts
• \( t \) — Time in hours
• 1000 — Conversion factor (watts to kilowatts)

Explanation: This formula converts watt-hours to kilowatt-hours by dividing by 1000, since 1 kilowatt equals 1000 watts.

3. Importance of Energy Calculation

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

4. Using the Calculator

Tips: Enter power in watts (found on appliance labels) and time in hours. For minutes, divide by 60 (e.g., 30 minutes = 0.5 hours).

5. Frequently Asked Questions (FAQ)

Q1: How do I find an appliance's power rating?
A: Check the label or specification sheet - it's usually listed in watts (W) or kilowatts (kW). 1 kW = 1000 W.

Q2: How does this relate to my electricity bill?
A: Utility companies charge per kWh. Multiply kWh by your rate to estimate cost (e.g., 5 kWh × $0.12/kWh = $0.60).

Q3: What's the difference between kW and kWh?
A: kW measures power (rate of energy use), while kWh measures energy (power × time).

Q4: How accurate is this calculation?
A: It's precise for constant loads. For variable loads (like refrigerators), use an energy monitor for accurate measurement.

Q5: Can I calculate monthly consumption?
A: Yes. Calculate daily kWh then multiply by 30, or multiply wattage by hours used per month divided by 1000.