1. What Is The Electric Energy Formula?

The electric energy formula (E = P × t) calculates energy consumption in kilowatt-hours (kWh) by multiplying power in kilowatts (kW) by time in hours. This is the standard measurement for electricity billing in the UK.

2. How Does The Calculator Work?

The calculator uses the electric energy formula:

Where:

• \( E \) — Energy (kWh)
• \( P \) — Power (kW)
• \( t \) — Time (hours)

Explanation: This formula calculates the total energy consumed by an electrical device over a specific period of time.

3. Importance Of Energy Calculation

Details: Calculating energy consumption is essential for understanding electricity costs, estimating bills, and managing energy usage efficiently in both residential and commercial settings.

4. Using The Calculator

Tips: Enter power consumption in kilowatts (kW) and time in hours. All values must be valid positive numbers. For appliances rated in watts, divide by 1000 to convert to kilowatts.

5. Frequently Asked Questions (FAQ)

Q1: How do I convert watts to kilowatts?
A: Divide the watt value by 1000. For example, 1500W = 1.5kW.

Q2: What is the average electricity cost per kWh in the UK?
A: As of 2024, the average electricity price in the UK is approximately 28-34 pence per kWh, but this varies by supplier and tariff.

Q3: How can I reduce my energy consumption?
A: Use energy-efficient appliances, turn off devices when not in use, and consider using timers or smart plugs to control usage.

Q4: Does this calculator work for three-phase power systems?
A: This calculator uses the basic formula E = P × t which applies to both single-phase and three-phase systems when power is given in kW.

Q5: How accurate is this calculation for estimating electricity bills?
A: The calculation provides a good estimate, but actual bills may include standing charges, VAT, and other fees that vary by electricity provider.