Precision Utility
Electricity Cost
Calculator
kWh Pricing
Pence
24p/kWh Avg
UK
Find out exactly how much any appliance costs to run. Enter the wattage, your daily usage hours and your electricity rate in pence per kWh — see the daily, monthly and yearly running cost in pounds instantly. Built around the current UK average rate of 24p/kWh.
Appliance Details
Total Electricity Cost
£5.76
Daily Cost
£0.19
Monthly Cost
£5.76
Yearly Cost
£70.08
kWh Used
240.0
How the electricity cost calculator works
Enter the power rating of your appliance in watts. You'll find this on the appliance label, in the manual or on the manufacturer's website. Common examples: a kettle is around 2,000-3,000W, a TV is 50-200W, and an LED bulb is 5-15W.
Set how many hours per day you use the appliance. If you leave a device on standby, count those hours too — standby power adds up over a year.
The electricity rate defaults to 24p/kWh, which is the approximate UK average under the Ofgem price cap. Change this to match your actual tariff for more accurate results.
The calculator converts watts to kilowatts, multiplies by hours and days to get total kWh consumed, then multiplies by your rate to produce the cost in pounds. You'll see the daily, monthly (30-day) and yearly (365-day) breakdown instantly.
UK electricity rates in 2026
Electricity prices in the UK are regulated by the Ofgem energy price cap, which is updated quarterly. Key facts:
- The current average unit rate is approximately 24p per kWh for electricity
- Standing charges are typically around 60p per day — this calculator focuses on unit costs only
- Economy 7 and time-of-use tariffs offer cheaper off-peak rates (often 8-12p/kWh overnight)
- Fixed-rate deals from suppliers may be above or below the price cap depending on market conditions
- Business rates are usually lower per unit but come with higher standing charges and additional levies
For the most accurate results, check your latest energy bill or your supplier's online account to find your exact unit rate. Source: Ofgem.
Frequently asked questions
How do I calculate the cost of running an appliance?
Multiply the appliance wattage by the number of hours you use it, then divide by 1,000 to get kWh. Multiply kWh by your electricity rate in pence per kWh and divide by 100 to get the cost in pounds.
What is the average UK electricity rate in 2026?
As of Q1 2026 the Ofgem energy price cap sets a typical unit rate of around 24p per kWh for electricity. Actual rates vary by supplier, tariff and region.
What does kWh mean?
kWh stands for kilowatt-hour. It is the standard unit of energy used for billing. One kWh is the energy consumed by a 1,000-watt appliance running for one hour.
How much does it cost to run a 2,000W heater all day?
At the UK average rate of 24p/kWh, a 2,000W heater running for 24 hours uses 48 kWh and costs around £11.52 per day, or roughly £345 per month.
How can I reduce my electricity costs?
Switch to energy-efficient appliances (look for A+++ ratings), use a smart meter to monitor usage, run high-power appliances during off-peak hours if on a time-of-use tariff, and turn off devices at the wall rather than leaving them on standby.
Where can I find my electricity rate?
Your unit rate is shown on your electricity bill or your energy supplier's online account. It is listed in pence per kWh. You can also check the current Ofgem price cap rate on the Ofgem website.