How Electricity Costs Are Calculated
Cost = power (kW) × hours × unit rate. A 2000W (2kW) heater running 2 hours/day at 24.5p/kWh costs 2 × 2 × 24.5p = 98p/day, or about £358/year.
Typical Appliance Running Costs (at 24.5p/kWh)
- Kettle (3kW): ~2.5p per boil
- Washing machine (2kW): ~25–50p per cycle
- Tumble dryer (2.5kW): ~£1+ per cycle — one of the most expensive appliances
- Electric oven (2.5kW): ~60p per hour
- Air fryer (1.5kW): ~15p per 25-min session
- Fridge-freezer: ~£90–£140/year (runs constantly but cycles on/off)
Reducing Your Bills
The biggest savings come from heating-related appliances: tumble dryers, electric heaters, immersion heaters. Air-drying clothes, using an air fryer instead of the oven for small meals, and only boiling the water you need all add up to £100+ per year.