Or do it my way, and not count at all!
Though that's overstating it - I don't count fruit and veg or suchlike ordinary food at all, and don't add up how many calories I've had in a day, or anything like that, but I do check how many calories there are in packaged snacks (most usually rice crackers - 50kcal-ish an individual packet - or wheat-based crackers - 115 kcal a packet - or the recently-discovered dried seaweed - 15 kcal a packet).
And I do check out how much the ingredients in any
baking I do add up to, but I don't bother counting the calories in ordinary
cooking, like chilli beans or soups etc.
Which brings me to Odlum's Coffee-Walnut Cake, as baked, served and eaten yesterday. My guess was pretty close! The cake itself came out at 3167, and the filling/topping (as per the recipe, but I only put it on top, so didn't use this much) came to 1565, which adds all up to 4732, call it 4800, and say twelve slices, and that's 400 calories a slice. Definitely an only-once-in-a-whiler, but it was a big hit with the guests, who carried away not only the recipe, but the third or so of the cake which was left uneaten.