1. What is a Kilowatt-hour Calculator?

Definition: This calculator estimates the energy consumption in kilowatt-hours (kWh) based on power in kilowatts (kW) and time in hours.

Purpose: It helps determine electrical energy usage for appliances, devices, or systems over a period of time.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( E_{kWh} \) — Energy in kilowatt-hours
• \( P_{kW} \) — Power in kilowatts
• \( t \) — Time in hours

Explanation: Energy consumption is simply the product of power and time. One kilowatt-hour equals one kilowatt of power used for one hour.

3. Importance of Energy Calculation

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

4. Using the Calculator

Tips: Enter the power in kilowatts (1 kW = 1000 watts) and time in hours. The time defaults to 1 hour for calculating kWh per hour.

5. Frequently Asked Questions (FAQ)

Q1: How do I convert watts to kilowatts?
A: Divide watts by 1000 (e.g., 1500W = 1.5kW).

Q2: Can I calculate for minutes instead of hours?
A: Yes, convert minutes to hours (e.g., 30 minutes = 0.5 hours).

Q3: What's a typical kWh consumption for household appliances?
A: Refrigerator: ~1.5 kWh/day, LED bulb: ~0.01 kWh/hour, AC: ~3 kWh/hour.

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

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