Christmas dinner calories: the full plate, the whole day and the real weight gain

A traditional British Christmas dinner is less about one rich dish than about the sheer number of things on the plate. The turkey itself is the lean part: roast turkey meat with a little skin has 190 kcal per 100 g in CoFID, the UK’s official food composition dataset, so a generous 150 g serving comes to 285 kcal with plenty of protein. Take the breast without the skin and it drops to 153 kcal per 100 g.

The trimmings are where the calories pile up. Roast potatoes soak up fat in the oven: 200 g, about four or five good-sized pieces (our estimate), bring 322 kcal, more than the turkey. Three pigs in blankets add another 183 kcal, a spoonful of sage and onion stuffing 127 kcal and roast parsnips 126 kcal. Sprouts and carrots barely register at around 25 kcal a portion, and gravy made from granules is lighter than its reputation at 30 kcal for 100 ml. Put together, a classic plate weighs around 830 g and comes to about 1,170 kcal before pudding.

Then comes dessert. A 100 g serving of Christmas pudding has 285 kcal, and a ladle of custard adds about 100 more. A single mince pie is 226 kcal, and few people stop at one over the whole of December.

Drinks rarely make it into the calorie count, yet they add up fast. A 125 ml glass of sparkling wine has about 105 kcal, and a 175 ml glass of red wine around 133 kcal. Port is the richest of the lot, with nearly 80 kcal in a small 50 ml glass, because it combines alcohol and sugar. Over the day, a glass of fizz, two glasses of red and a port after the cheese come to about 450 kcal, roughly the same as a second plate of roast potatoes and pigs in blankets.

Alcohol also works in quieter ways. It makes it easier to say yes to more roast potatoes or another mince pie, and the body burns it first, putting fat-burning on hold, as we explain in our article on alcohol and weight. Alternating each drink with a glass of water is the simplest way to drink less without feeling left out, and to reach the pudding with a clear head.

Add up the starter, the main, the pudding and the drinks and you get the real total. The classic Christmas dinner, with smoked salmon, roast turkey and all the trimmings, Christmas pudding with custard, a glass of fizz and two glasses of red wine, comes to about 2,030 kcal. A lighter version, with turkey breast, three roast potatoes, plenty of veg, one pig in blanket, a mince pie and a single glass of fizz, comes in under 1,000 kcal without losing the festive feel. At the other end, the day where you go back for seconds, add pâté and finish with port passes 2,700 kcal.

In between, every choice counts. Two extra roast potatoes are about 160 kcal and each pig in blanket about 60; a mince pie instead of Christmas pudding saves about 60 kcal, and skipping the custard another 98. The cheeseboard isn’t included here and can easily add a few hundred more. Build your own meal with the calculator below.

The dinner is only part of the day. On 25 December, between breakfast, Christmas dinner, the tin of chocolates doing the rounds in the afternoon and a turkey sandwich in the evening, it’s easy to reach 3,000 kcal or more. For most adults, whose needs are somewhere around 2,000 to 2,500 kcal, the surplus is therefore 500 to 1,000 kcal for the day.

If Christmas Eve drinks and nibbles come first, the combined surplus over two days stays in the region of 1,000 to 2,000 kcal. That sounds like a lot, but it helps to compare it with the energy stored in a kilo of body fat, usually estimated at around 7,700 kcal. Two days of celebrating therefore add, at most, 0.1 to 0.3 kg of fat. The extra few hundred grams, sometimes a whole kilo, on the scales on Boxing Day are mostly water held with the salt and carbohydrates of the meal, plus food still being digested.

What really makes the difference is not one meal but how long the season lasts: from the first door of the advent calendar to the leftovers at New Year, festive eating stretches over weeks. Our guide to the calorie deficit explains why the balance over weeks matters far more than any single day.

Every country has its own festive menu, and the totals are remarkably close. In France, the big meal is often the réveillon on Christmas Eve: foie gras on toast, oysters or smoked salmon, turkey or capon with chestnuts and a potato gratin, then a bûche de Noël (a chocolate log cake) and a box of chocolates, with champagne. It comes to about 1,720 kcal, the lightest of our five menus, even though foie gras alone has 488 kcal per 100 g. In Germany, roast goose with red cabbage and potato dumplings (Klöße) is the star of Christmas Day, after sausages and potato salad on Christmas Eve; with a slice of Stollen and a few biscuits it reaches about 1,790 kcal.

In Norway, the main meal is on the evening of the 24th. Ribbe, roast pork belly with crackling, rules in the east, and pinnekjøtt, salted and dried lamb ribs, in the west. A ribbe dinner with all its sides, rice cream (riskrem), a Christmas beer and a small aquavit comes close to 1,960 kcal. In Spain, the celebration also starts on the 24th: ham, cheese and prawns, roast suckling lamb, then turrón, polvorones and marzipan with cava, for about 1,800 kcal. The British dinner, at around 2,030 kcal, tops the list mainly because of the roast potatoes and sausages.

You often hear that people gain two or three kilos over the festive season. Studies that actually weighed people tell a different story. The most cited, published in 2000 in the New England Journal of Medicine by Jack Yanovski and colleagues, followed 195 American adults: between mid-November and early January, they gained an average of 0.37 kg. A review of the research published in 2017 by Díaz-Zavala and colleagues confirms the order of magnitude: in adults, holiday weight gain ranges from 0.4 to 0.9 kg depending on the study.

That’s not much, but it isn’t nothing. In Yanovski’s study, those few hundred grams had not been lost by the following spring, or even the next autumn. Repeated year after year, they contribute to the slow weight gain of adulthood. So the real issue isn’t Christmas dinner, it’s the weeks around it: chocolates at the office, one party after another, leftovers and a slow return to normal habits.

The good news is that it can be prevented without dieting. In a randomised trial run in Birmingham over Christmas 2016 and 2017 (Mason and colleagues, BMJ, 2018), people who weighed themselves regularly and received a few simple tips actually lost a little weight (minus 0.13 kg), while the comparison group gained 0.37 kg. Keeping an eye on the trend is often enough to stop it creeping up.

A festive meal doesn’t need to be paid back. Skipping breakfast on Boxing Day, fasting for a whole day, two hours in the gym or a January ‘detox’: these tactics feel like they wipe the slate clean, but mostly they feed a cycle of overeating and restriction. A very restrictive day makes you hungrier in the evening, encourages grazing and makes the next meal harder to manage. Our article on the risks of eating too little to lose weight explains why the body pushes back against this kind of approach.

The better approach is much simpler. The next day, go back to your usual meals: plenty of vegetables, a source of protein (eggs, fish, chicken, beans or lentils), a normal portion of starchy food and not too much salt, to help your body get rid of the water it’s holding. Drink water, go for a walk, get some sleep. If you really want to even things out, trimming a hundred calories or so from the next few days’ meals is plenty.

Above all, enjoy it. Christmas dinner is about sharing a moment with people, not a nutrition test. Eating slowly and paying attention to your food helps you appreciate every mouthful and notice sooner when you’ve had enough. If food becomes a source of anxiety over the holidays, talk to your GP or another health professional.

A classic British Christmas dinner comes to about 2,030 kcal per person, and the other countries we looked at are in the same range, from 1,720 kcal in France to 1,960 kcal in Norway. With breakfast, chocolates and a turkey sandwich, Christmas Day passes 3,000 kcal, a real but limited surplus: two days of feasting add a few hundred grams of fat at most. Studies find an average gain of 0.4 to 0.9 kg over the whole festive season, which matters mainly because it often isn’t lost afterwards. Roast potatoes, pigs in blankets, custard and drinks are the easiest places to cut back without missing out. And the next day, the best strategy is simply to go back to normal meals, without fasting or punishing yourself.