Power Consumption Calculator UK

Energy Consumption Formula:

\[ kWh = \frac{Power (W) \times Hours}{1000} \]

Energy Consumption:

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1. What is Power Consumption?

Power consumption refers to the amount of electrical energy used by an appliance or device over time. In the UK, energy usage is typically measured in kilowatt-hours (kWh), which is the standard unit for electricity billing.

2. How Does the Calculator Work?

The calculator uses the energy consumption formula:

\[ kWh = \frac{Power (W) \times Hours}{1000} \]

Where:

\( Power \) — Electrical power in watts (W)
\( Hours \) — Time duration in hours
\( 1000 \) — Conversion factor from watts to kilowatts

Explanation: This formula converts the power consumption from watts to kilowatts and multiplies by the number of hours to get total energy usage in kilowatt-hours.

3. Importance of Energy Calculation

Details: Calculating energy consumption helps UK households and businesses understand their electricity usage, estimate energy costs, identify energy-efficient appliances, and reduce carbon footprint.

4. Using the Calculator

Tips: Enter the power rating of your appliance in watts and the number of hours it operates. Both values must be positive numbers. The calculator will provide the energy consumption in kilowatt-hours (kWh).

5. Frequently Asked Questions (FAQ)

Q1: What is a typical power consumption for household appliances?
A: LED bulbs: 5-15W, Laptop: 50-100W, Refrigerator: 100-200W, Kettle: 2000-3000W, Washing machine: 500-1500W.

Q2: How much does 1 kWh cost in the UK?
A: As of 2025, the average electricity price in the UK is approximately 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 standby devices, use LED lighting, optimize heating settings, and consider smart energy management systems.

Q4: What's the difference between kW and kWh?
A: kW (kilowatt) measures power (rate of energy use), while kWh (kilowatt-hour) measures energy (total consumption over time).

Q5: Are there government schemes for energy efficiency in the UK?
A: Yes, schemes like the Energy Company Obligation (ECO) and Great British Insulation Scheme help households improve energy efficiency and reduce costs.