# Holiday Weight Gain: How Much Is Really Fat, and How to Prevent It _How much weight people really gain over the holidays and on vacation, how to tell water from fat, and the trial-tested habits that help you hold steady._ **The short answer** **Most people gain about a pound over the holidays, not the five to ten pounds often claimed.** In an NIH study, the average gain from mid-November to early January was 0.8 pounds, and fewer than 10% of people gained more than 5 pounds. A bigger jump after a feast or a trip is mostly water, salt and undigested food. The small real gain deserves attention, because it usually doesn't come off on its own. - **0.8 lb** - Average holiday-season gain in an NIH study - **Under 10%** - Share of people who gained more than 5 pounds - **17,500** - Extra calories it would take to gain 5 pounds of fat - **2x a week** - Weighing that helped people hold steady in a holiday trial You step on the scale after Thanksgiving or a week at the beach, and the number is up four or five pounds. It's easy to assume the worst and feel like weeks of careful effort just disappeared. Fortunately, most of that jump isn't fat, and it usually fades within days. The less obvious news is that a small part often stays. This guide explains how much weight people really gain over the holidays and on vacation, and how to separate temporary water from actual fat. It also covers which strategies have helped people hold steady. ## How Much Weight People Really Gain The popular claim is five pounds or more between Thanksgiving and New Year's Day. However, when researchers actually weighed people before and after the holidays, the measured gains were much smaller. | Study | Period | Average gain | | --- | --- | --- | | NIH, 195 U.S. adults | Mid-Nov to early Jan | 0.8 lb | | 368 Australian adults | Christmas and New Year | 0.65% of body weight | | 122 adults on vacation | 1 to 3 week trip | 0.7 lb | | Review of adult studies | Holiday season | 0.9 to 2 lb | In the [NIH study](https://doi.org/10.1056/NEJM200003233421206), participants also believed they had gained about three pounds more than they actually had, so the worry was considerably bigger than the gain. Averages hide a wide range, though, and people with overweight or obesity were more likely to gain five pounds or more. A review of holiday studies also found that people actively trying to lose weight still tended to gain during the season. ## Water or Fat? Reading a Post-Holiday Jump A four-pound jump after a big weekend can't be four pounds of fat. Storing a single pound of fat takes roughly 3,500 calories more than you burn. | Holiday extras | Calories | | --- | --- | | 1 cup eggnog | 224 | | 2 glasses red wine (5 fl oz each) | 250 | | 1 slice pecan pie | 541 | | 3 sugar cookies | 237 | | Total extras | 1,252, about 1/3 lb of fat | | Needed for 5 lb of fat | 17,500, or 2,500 extra daily for a week | The rest of the jump comes mostly from water and food that's still in transit. Carbohydrates refill the glycogen in your muscles and liver, and your body stores each gram of glycogen with about three to four grams of water. Salty holiday dishes make you hold extra water as well, and a large meal simply weighs something until it finishes passing through. That's why the number usually drifts back down over several days of normal eating. The [daily fluctuation guide](/why-weight-fluctuates-daily/) explains each of these causes in more detail. ### How to Tell Which Is Which Give it a week before you judge, returning to your usual meals and weighing under the same conditions as before. Whatever remains after a week of regular eating is much closer to your real change. ## Why a Small Gain Still Matters If the real gain is only about a pound, why worry? Because it tends to stick. In the NIH study, participants didn't lose their holiday pound during the following spring or summer, and a year later they were about 1.4 pounds heavier than when they started. Vacation gain behaves similarly. In a study of 122 adults, the weight gained on a one to three week trip was still there six weeks after they returned home. One pound a year sounds minor, but over ten or twenty years it may account for much of the gradual weight gain many adults notice. ## What Actually Helps A [UK trial](https://doi.org/10.1136/bmj.k4867) tested a simple approach with 272 adults in the weeks before Christmas. One group received a general healthy living leaflet, while the other weighed themselves at least twice a week and recorded the results. They also received holiday tips and labels showing how much activity it takes to burn off festive treats. By January or February, the weighing group had lost a little weight on average, while the leaflet group had gained about 0.8 pounds. The difference was roughly one pound, which sounds small until you remember that it's the entire typical holiday gain. The NIH study points in the same direction. Participants who reported being more active or less hungry than usual gained the least, and some even lost weight, while those who were less active or hungrier gained the most. ## A Simple Plan to Hold Steady You don't need to diet through the holidays. For most people, maintenance is a realistic goal for this stretch and far easier to stick with. - **Switch your goal to maintenance.** Eat to hold your weight until January, then resume your loss pace. - **Weigh twice a week.** Use the same time and conditions, and watch the trend, not single days. - **Choose your big occasions.** Enjoy the celebrations that matter most rather than grazing at every gathering. - **Keep ordinary days ordinary.** Between celebrations, eat your usual protein, vegetables and fiber so you don't arrive at parties starving. - **Count your drinks.** Eggnog, wine and cocktails add up quickly. - **Keep moving.** A walk after a large meal or a daily step goal helps, and the [walking guide](/walking-for-weight-loss/) shows what a walk burns. If one day goes far over, simply return to your plan at the next meal. Skipping meals or cutting hard the following day can leave you hungrier, and the [overeating guide](/back-on-track-after-overeating/) covers that next day in detail. ## After a Vacation The same approach works after a trip. Expect the scale to read higher at first, especially after flights, restaurant meals and salty food, so wait about a week of normal routine before judging. If a pound or so remains, return to your usual target rather than crash dieting. If you were already close to your goal, the [maintenance guide](/transition-to-maintenance/) explains how to find your steady number again. **In WeightPlot** To hold steady through the holidays, set your goal weight to your current weight. Your daily target switches to maintenance, and you can set your real goal again in January. Your weight chart shows every weigh-in, so a holiday bump is easy to see against your longer trend. ## Common Questions ### How long does holiday water weight take to go away? Usually several days to a week of normal eating. ### Should you stop weighing yourself over the holidays? Not necessarily, since weighing at least twice a week helped people avoid gaining in a holiday trial. Compare trends rather than single days. ## The Bottom Line Holiday and vacation weight gain is real, but it's considerably smaller than most people think. The average is about a pound, and a bigger jump on the scale is mostly water and food that fades within a week. The small real gain still deserves attention, because it rarely disappears on its own. If you finish the season a pound or two up, return to your usual target and it will come off at your normal pace. Aim to maintain through the season, weigh twice a week, stay active and choose the celebrations that matter most. Then, in January, you can continue from where you left off. **Key takeaways** - **The average holiday gain is about 1 pound,** not 5 to 10. - A big post-feast jump is mostly water and food in transit. - Weighing twice a week prevented holiday gain in a trial. - Aim to maintain until January, then resume your loss pace. **Sources** - Yanovski JA, et al. A prospective study of holiday weight gain. N Engl J Med. 2000;342:861–867. - National Institute of Child Health and Human Development. Holiday weight gain slight, but may last a lifetime. March 22, 2000. - Maher C, et al. Weekly, seasonal, and festive period weight gain among Australian adults. JAMA Netw Open. 2023;6:e2326038. - Cooper JA, Tokar T. A prospective study on vacation weight gain in adults. Physiol Behav. 2016;156:43–47. - Díaz-Zavala RG, et al. Effect of the holiday season on weight gain: a narrative review. J Obes. 2017;2017:2085136. - Mason F, et al. Effectiveness of a brief behavioural intervention to prevent weight gain over the Christmas holiday period. BMJ. 2018;363:k4867. - Kreitzman SN, Coxon AY, Szaz KF. Glycogen storage: illusions of easy weight loss, excessive weight regain, and distortions in estimates of body composition. Am J Clin Nutr. 1992;56:292S–293S. - U.S. Department of Agriculture. FoodData Central, SR Legacy.