How many calories do you burn in a day?

Search "how many calories do you burn a day" and you get three different answers: 2,000 from a food label, 1,800 from one calculator and 2,600 from your watch. If you're trying to lose weight, or just eat enough for the training you do, that spread is frustrating. Pick the wrong number and a careful plan can stall for reasons that have nothing to do with willpower.

The 2,000 on food labels was never meant to describe you. The FDA calls it "a general guide for nutrition advice" and says real needs vary with age, sex, height, weight and activity. A better answer comes from studies that measured what thousands of adults burned while living their normal lives. For most adults, it's higher than the label.

Below you'll find how many calories the average person burns a day, tables by age, sex and body weight, the four parts of your daily burn in their real proportions, what steps and workouts add, why your body adapts to extra activity and how many calories you should be burning a day for your goal.

How Many Calories Does the Average Person Burn a Day?

The average American woman burns about 2,140 calories a day if her activity stops at a normal daily routine, and about 2,310 if she adds an hour of walking. The average American man burns about 2,730 and 2,950. Those figures are for a 40-year-old at the latest CDC average body size: 5 ft 3.5 in and 171.8 lb for women, and 5 ft 9 in and 199 lb for men.

The estimates come from the prediction equations in the 2023 Dietary Reference Intakes for Energy from the National Academies of Sciences, Engineering, and Medicine (NASEM). The committee drew on a doubly labeled water database that held 5,456 measurements of adults. In this method you drink water tagged with two stable, non-radioactive isotopes. Over the next week or two, the difference in how fast the two leave your body shows how much carbon dioxide you made, and so how many calories you burned while you went about your usual life.

The report sorts adults into four activity levels, and its examples make them concrete:

• Inactive: a normal routine, which already includes about 30 minutes of walking around and 90 minutes of light activity such as housework.
• Low active: that routine plus 60 to 80 minutes of walking at 3 to 4 mph.
• Active: the routine plus about two hours of moderate exercise, such as 30 to 50 minutes of walking, 45 minutes of cycling and 40 minutes of doubles tennis.
• Very active: the routine plus about 45 minutes of cycling, 25 minutes of jogging and an hour of doubles tennis.

Treat the levels as rough guides. The report notes that no reliable tool exists for placing a person in one, and its equations have a typical error of about 250 calories a day for women and 340 for men.

How many calories does an inactive person burn in a day?

An inactive adult burns about 1,870 to 3,060 calories a day at age 40, depending mostly on size, if you count adults between 120 and 250 pounds. "Inactive" here still includes a normal day of walking around and doing chores, which is why the numbers are higher than many people expect. To build the number up from your resting rate instead, see our breakdown of how many calories you burn in a day without exercise.

Calories Burned Per Day by Age and Sex

Here's how the estimates change with age for adults of the average American size. Height and weight stay the same in every row, so only age changes as you read down.

Calories a day from the NASEM 2023 equations, rounded to the nearest 10, for a woman of 5 ft 3.5 in and 171.8 lb and a man of 5 ft 9 in and 199 lb. A routine day is the inactive level and an hour's walk is the low-active level. The active level adds about 140 calories a day for women and 200 for men.

At the same height and weight, the equations take off about 70 calories a day per decade for women and about 110 for men. That doesn't mean your metabolism winds down through your 30s and 40s. Pontzer and colleagues (2021) pooled doubly labeled water data from 6,421 people aged 8 days to 95 years in 29 countries. Once fat-free mass and fat mass were accounted for, adult daily burn held steady from about age 20 to 60, even through pregnancy. The decline started at about 63 and ran at roughly 0.7 percent a year, which left people in their 90s about 26 percent below midlife adults.

So before 60, the falling numbers in the table mostly reflect a slow shift from muscle to fat at the same body weight. That's the part you can push back on with strength training. Our review of how to boost metabolism walks through the full life-course findings and which tissues burn the most.

Sex works the same way. Men burn more mainly because they're larger and carry more muscle. In Pontzer's data, sex made no difference to adult daily burn once body composition was taken into account.

Calories Burned Per Day by Body Weight

Body weight changes the answer more than age does. This table holds age at 40 and height at 5 ft 4 in for women and 5 ft 9 in for men:

Each extra 10 pounds adds about 55 calories a day for women and 65 to 70 for men, and each extra inch of height adds about 15 to 20. Heavier bodies burn more because they carry more tissue to keep running and more mass to move. That's also why a weight-loss plan needs updating as you get smaller: the same day costs a lighter body less. For a quick personal estimate, our TDEE calculator works from your own height, weight, age and activity.

The Four Parts of Your Daily Burn

Your daily burn has four parts: resting metabolism, digesting food, everyday movement and exercise. In his review of doubly labeled water studies, Westerterp (2013) treats digestion as about 10 percent of the total for people eating a mixed diet, and works out movement as 90 percent of the total minus resting metabolism. Here's what that gives at three activity levels:

In Westerterp's own sample of 647 healthy adults, total burn ranged from 1.13 to 2.85 times resting metabolism. He puts the range that people can keep up for years at about 1.1 to 1.2 times resting at the bottom and 2.0 to 2.5 at the top.

Resting metabolism: the biggest part

Resting metabolism pays for your organs, your brain and your body temperature, and it's the largest part for almost everyone. For the average 40-year-old American woman, estimated with the Mifflin-St Jeor equation (Mifflin and colleagues, 1990), it comes to about 1,430 of the 2,310 calories she burns on a day with an hour's walk, or 62 percent. You'd still burn it lying in bed all day, which is why sleeping and sitting quietly add so little on top.

Digesting food: about a tenth

Turning food into usable fuel costs energy too. For the same woman, that's about 230 calories a day. Protein costs the most to process, at 20 to 30 percent of its own calories, against 5 to 10 percent for carbohydrate and 0 to 3 percent for fat, according to Westerterp's 2004 review of diet-induced thermogenesis. A higher-protein diet nudges this part up a little, but it stays near a tenth of the day.

Everyday movement: the part that varies most

Everything you do on your feet that isn't a workout counts here: walking to the car, standing, cooking, cleaning, carrying kids and fidgeting. Scientists call it non-exercise activity thermogenesis, or NEAT. For the woman above, all her movement comes to about 650 calories a day. About 310 of that is her hour of brisk walking, and the other 340 comes from her ordinary routine. It's the part that differs most between people of the same size, and our review of non-exercise activity thermogenesis covers the Mayo Clinic studies that measured how much.

Exercise: often the smallest part

Deliberate exercise is often the smallest slice of the day. People who don't train get none of it, and a typical session adds about 150 to 300 calories above resting, as the next section shows. That's real, and it's also less than many people assume when they plan to out-train their eating.

How Steps and Workouts Change Your Daily Total

Steps are the simplest lever. Going from about 4,000 to 10,000 steps a day adds roughly 170 to 230 calories above resting for adults between 150 and 200 pounds. That's close to the gap between the routine-day and hour's-walk columns in the tables above, so walking more is the most direct way to move from one column to the next.

How many calories do 10,000 steps burn?

Ten thousand steps burn about 300 to 700 calories for most adults, depending mainly on body weight and pace, and about three-quarters of that is extra burn on top of resting. For the average American woman at 172 pounds, that's roughly 320 to 360 extra calories, or about 14 to 16 percent of her day. Our page on how many calories 10,000 steps burn breaks it down by weight and walking speed.

What a workout adds

A workout adds whatever it costs above your resting rate. Using the 2024 Adult Compendium of Physical Activities and the usual conversion of about 1.05 calories per kilogram for each MET-hour, here's what three common sessions add for a 165-pound adult:

• A 30-minute brisk walk at 3.5 to 3.9 mph: about 150 calories above resting.
• A 45-minute dumbbell session of 8 to 15 reps a set: about 150.
• A 30-minute bodyweight circuit: about 195.

On the day itself, your total rises by roughly what the session cost. For what a very high-activity day looks like, our guide on how to burn 1,000 calories a day builds one from walks, a home workout and chores. Over months, though, part of the extra burn disappears.

Why Your Body Adapts to Extra Activity

If every workout added its full cost, very active people would burn far more than they do. Pontzer and colleagues (2016) measured 332 adults aged 25 to 45 in Ghana, South Africa, the Seychelles, Jamaica and the US with doubly labeled water, and tracked their movement with accelerometers. Daily burn rose with activity among the least active people, then leveled off. Across the most active 40 percent of the sample, extra movement added little or nothing measurable to the day. The authors called this constrained total energy expenditure: the body seems to make room for activity by spending less on other, non-muscular work.

Hunter-gatherers show the same ceiling. Among the Hadza of Tanzania, men walked about 11 km a day and women about 6 km. The men's daily burn was 2.26 times their resting rate, against 1.81 in Western men. Yet once body size was accounted for, Hadza daily burn was no different from that of Western adults (Pontzer and colleagues, 2012).

The offset also differs from person to person. Pooling measurements from 1,754 adults, Careau and colleagues (2021) found that lower basal burn offset about 30 percent of activity calories in people at the 10th percentile of BMI. At the 90th percentile it offset about 46 percent, with no difference by age or sex. Nobody knows yet which comes first, the extra body fat or the stronger compensation.

Training studies point to a behavioral route as well. In Westerterp's review, younger adults who started training raised their overall activity level, while older trainees moved less outside their sessions, so their total stayed the same. In a Maastricht study of women with obesity, eight weeks of diet plus exercise lowered daily burn about as much as diet alone, because the exercisers moved less the rest of the time.

Losing weight adds a second layer. A smaller body burns less because there's less of it to run. On top of that, someone who has lost weight from obesity needs about 300 to 400 fewer calories a day than a never-obese person of the same weight and body composition, mostly because their muscles do the same movement on less energy (Rosenbaum and Leibel, 2010). Our review of set point weight theory covers how big and how lasting that slowdown is.

Exercise still adds to your day, especially if you start from very little movement, and it does far more for your health than burn calories. The adaptation simply means a workout's calorie count overstates what will show up on the scale.

How Many Calories Should I Be Burning a Day?

There's no number of calories you should be burning, because your total is set mostly by your size and how much you move. The useful question is how your eating compares with it:

• To hold your weight steady, eat about what you burn. The tables above give a starting point.
• To lose weight, eat less than you burn. A gap of about 500 calories a day is a common starting point, and our review of calorie deficit research explains why the scale moves more slowly than the old 3,500-calorie rule predicts.
• To gain weight or build muscle, eat a little more than you burn, and pair it with strength training so more of the gain is muscle.

If your watch shows active calories, the question of how many active calories you should burn a day is really about your workouts and daily movement. Our page on how many calories you should burn working out sets weekly targets for health, weight loss and keeping weight off from the exercise-dose trials.

How to Work Out Your Own Daily Burn

Every estimate on this page, and every calculator, is a starting point with an error of a few hundred calories. To get closer to your real number:

1. Start with an estimate. Use the tables above or the TDEE calculator.
2. Keep your eating steady for two to three weeks. Log it as honestly as you can, including drinks and weekends.
3. Weigh yourself several mornings a week and compare weekly averages, since single readings swing with water and food.
4. Adjust. If your average weight holds, you're eating about what you burn. If it drifts up or down, your real burn is below or above what you eat.

What This Means for You

Your daily burn is probably bigger than the 2,000 on the label, and it's steadier than most diet plans assume. Your size sets most of it. The part you control best is movement, starting with how much you walk, and the habits you can keep for months matter more than any single big workout.

Picture a few months from now: a walk most days, two or three short strength sessions a week and a routine with more time on your feet. You'd burn a couple of hundred calories more on an ordinary day, keep the muscle that holds your resting burn up as you age and stop guessing at your numbers. If showing up is the hard part, FitCraft's 3D AI coaches lead bodyweight and dumbbell workouts you can do at home, say your name as you go and adapt your plan as you progress, while streaks and a new quest every month give you a reason to come back. If you're still choosing, our comparison of workout apps for weight loss puts seven options side by side.

As Stacy, a FitCraft user who lost 22 pounds in four months, put it: “After my second kid, I needed something stupidly simple.”