1. What Is The Power Usage Formula?

The power usage formula calculates energy consumption by multiplying power (in kilowatts) by time (in hours). This provides the energy usage in kilowatt-hours (kWh), which is the standard unit for electricity billing in the UK.

2. How Does The Calculator Work?

The calculator uses the power usage formula:

Where:

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

Explanation: This simple formula calculates how much energy an electrical device consumes based on its power rating and the duration of use.

3. Importance Of Energy Calculation

Details: Calculating energy usage is essential for understanding electricity consumption, estimating utility bills, and identifying opportunities for energy savings in UK households and businesses.

4. Using The Calculator

Tips: Enter the power rating of your appliance in kilowatts (kW) and the duration of use in hours. For appliances rated in watts, divide by 1000 to convert to kilowatts before entering.

5. Frequently Asked Questions (FAQ)

Q1: How do I convert watts to kilowatts?
A: Divide the wattage by 1000. For example, a 1500W appliance is 1.5kW.

Q2: What's the average electricity cost per kWh in the UK?
A: As of 2024, the average electricity price in the UK is around 28-34p 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: Are there different electricity rates at different times?
A: Some tariffs offer cheaper rates during off-peak hours (Economy 7/10) which can help reduce energy costs.

Q5: Does this calculator work for all electrical devices?
A: Yes, it works for any electrical appliance as long as you know its power rating and usage time.