Air conditioner
Check what cooling your room could cost in pounds and pence.
Free household calculator
What does your appliance cost to run?
Choose an appliance, enter how often you use it and see the estimate.
Quick estimate
Start your estimate
Use an exact appliance calculator
Instant estimate
Calculate the running cost
Example values — replace these with the figures from your appliance.
Your estimate
Custom appliance results
Calculation breakdown
This estimate uses your electricity unit rate. It does not allocate your daily standing charge to individual appliances.
Start here
Popular calculators
Tap a picture to jump straight into a popular household estimate.
Electric heater
See an estimate for winter heating sessions in just a few taps.
Dehumidifier
Work out the daily or weekly cost of drying out a room.
Air fryer
Great for quick meals and easy comparisons with the oven.
Tumble dryer
Find the estimated cost per drying session and over the year.
Kettle
See what all those daily boils add up to over time.
Flagship tool
Your household basket
Add appliances, edit usage later and see your estimated household total in one place.
+ Add appliances✎ Edit usage£ See totals
Build my basketBrowse by room or need
Explore by category
Prefer to browse instead of search? Start with a simple category.
Heating and cooling
Air conditioners, fans, heaters and dehumidifiers.
Kitchen
Air fryers, kettles, ovens, microwaves and more.
Laundry and cleaning
Tumble dryers, washing machines, irons and vacuum cleaners.
Entertainment and office
Televisions, consoles, laptops and home office devices.
Two handy tools
Compare appliances
See which option costs less to run over time, even when the labels are different.
Open comparison tool →Smarter buying
Replacement payback
Test whether a more efficient appliance could recover the upfront cost through savings.
Calculate payback →Quick reading
Helpful guides
Short explanations for the things people usually want to know next.
Useful guide
How to find your electricity unit rate
Find the pence-per-kWh figure on your bill so your estimates match your tariff more closely.
Useful guide
Air fryer vs oven
Compare the likely running cost for the same cooking task, including small batches and preheating.
Useful guide
Fan vs portable air conditioner
Understand the cost difference between moving air and actually cooling the room.
Calculation transparency
The assumptions stay visible
Every result still shows how the estimate was worked out, so the site stays simple without hiding the method.
Read the methodologyCommon questions
Frequently asked questions
How accurate is the calculator?
It applies transparent formulas to your figures. Actual use varies with the appliance, settings, cycling and behaviour.
Do I need an account?
No. You can calculate as a guest. A free account is available if you want to save your basket, planner and history.
Does it include standing charge?
No. Appliance estimates use the electricity unit rate and keep the daily standing charge separate.
Can I compare appliances with different labels?
Yes. The comparison tool normalises watts/time, cycle and annual-energy inputs to annual kWh.
Can I save a report as PDF?
Yes. Use the print action in the basket or planner and choose Save as PDF in your browser.