The reason I refer to EV Database is because it is used as a reference by peoples far more knowledgeable than me. No test will be perfect but it is a lot closer than WLTP and can be anything from slightly under or slightly over. The numbers I got for both of my cars were pretty accurate and several others have confirmed that they weren’t far off for them as well. Yes the maths is simple and still gives maximum range possible in those conditions, which means from full to needing a tow to charge, and we all know that we usually have a buffer at the lower end and we’ll rarely fill up to max. So what we find in real life is always less, with the exception of efficiency. I started off with an equally high level of scepticism, which is my usual approach anyway, but it is a fair bit more accurate than anything else I’ve seen.
Interesting. I will have a play tonight when I get 5 and see what calculator I can come up with based on our seasons 🙂