Question 1

How is electricity cost calculated?

Accepted Answer

Cost = (Watts × Hours per day) / 1000 × Days × Rate per kWh. For example, a 100W bulb running 5 hours a day at $0.15/kWh costs (100×5/1000) × 30 × 0.15 = $2.25 per month.

Question 2

What is a typical electricity rate per kWh?

Accepted Answer

In the US the average is about $0.16/kWh, in the UK £0.30, and in the EU around €0.25. Rates vary by region, time of use, and provider — check your utility bill for the exact figure.

Question 3

How can I reduce my electricity bill?

Accepted Answer

Switch to LED lighting, use smart power strips to stop vampire draw, run dishwashers and washing machines with full loads, set your AC 1-2°C higher in summer, and run high-wattage appliances during off-peak hours.

Question 4

Do appliances use power when turned off?

Accepted Answer

Yes — most modern electronics draw 0.5 to 5 watts in standby. Vampire load can add 5-10% to a typical household bill, which is why smart strips and unplugging idle devices can help.

📊 Detailed Breakdown