1. What is Cost per Watt?

Cost per watt is a metric that converts the more commonly quoted cost per kilowatt-hour (kWh) into cost per watt-hour, making it easier to calculate electricity costs for small devices or short periods of operation.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• Cost per kWh — The price you pay for one kilowatt-hour of electricity in UK pounds
• 1000 — Conversion factor (1000 watts = 1 kilowatt)

Explanation: Since 1 kWh equals 1000 watt-hours, dividing the cost per kWh by 1000 gives you the cost per watt-hour.

3. Importance of Cost per Watt Calculation

Details: Calculating cost per watt helps in understanding the actual cost of running electrical devices, especially when comparing energy efficiency of appliances or calculating costs for devices that consume power in watts rather than kilowatts.

4. Using the Calculator

Tips: Enter your electricity cost per kilowatt-hour in UK pounds. The calculator will automatically compute the cost per watt-hour.

5. Frequently Asked Questions (FAQ)

Q1: Why calculate cost per watt?
A: It's useful for calculating the cost of running small devices or for very short periods where watt-hours are more practical than kilowatt-hours.

Q2: How does this relate to my electricity bill?
A: Your bill shows cost per kWh. This calculator helps break that down to smaller units for more precise calculations.

Q3: What's the average electricity cost in the UK?
A: As of 2023, the average is about £0.34 per kWh, but this varies by supplier and tariff.

Q4: Can I use this for solar power calculations?
A: Yes, it can help calculate the value of solar-generated power on a per-watt basis.

Q5: How accurate is this calculation?
A: It's mathematically precise, but remember that actual electricity costs may vary due to standing charges, tiered pricing, or time-of-use tariffs.