1. What is Watt Hour?

A watt-hour (Wh) is a unit of energy equivalent to one watt (1 W) of power expended for one hour (1 h) of time. It's commonly used to measure electrical energy consumption in the UK and worldwide.

2. How Does the Calculator Work?

The calculator uses the watt-hour formula:

Where:

• \( Wh \) — Watt-hours (energy)
• \( P \) — Power in watts (W)
• \( h \) — Time in hours (h)

Explanation: The formula simply multiplies power consumption by time to calculate total energy used.

3. Importance of Watt Hour Calculation

Details: Calculating watt-hours helps UK consumers understand their electricity usage, estimate energy costs, and compare appliance efficiency.

4. Using the Calculator

Tips: Enter power in watts and time in hours. Both values must be positive numbers. The calculator will compute the energy consumption in watt-hours.

5. Frequently Asked Questions (FAQ)

Q1: How is watt-hour different from kilowatt-hour?
A: 1 kilowatt-hour (kWh) = 1000 watt-hours (Wh). kWh is the standard unit for UK electricity billing.

Q2: How can I convert watt-hours to cost?
A: Multiply watt-hours by your electricity rate (e.g., £0.30 per kWh = £0.0003 per Wh).

Q3: What's a typical watt-hour consumption for UK appliances?
A: A 60W bulb running for 5 hours = 300Wh. A 2000W kettle for 0.1h (6 mins) = 200Wh.

Q4: Why is watt-hour important for solar systems?
A: It helps size battery storage needed for UK homes using solar panels.

Q5: How accurate is this calculation?
A: It's precise for constant loads. For variable loads, use energy monitoring devices.