Guides

Plain explanations of how to read the figures on this site and how to work a few of them out yourself.

How to read an average priceWhat a published average price covers, what it leaves out, and how to compare it with your own receipt.Read the guide
Why typical is not the same as averageHow a few extreme prices pull an average, and why this site shows the middle half instead.Read the guide
How to work out what an appliance costs to runThe three numbers you need, where to find each one, and what the result does not include.Read the guide