To lose 2 pounds per week, you need to create a daily calorie deficit of roughly 1,000 calories. That means eating 1,000 fewer calories than your body burns each day. For most people, this puts the target somewhere between 1,200 and 2,000 calories per day, depending on your size, age, sex, and how active you are. Two pounds a week sits at the upper edge of what the CDC considers a safe, sustainable rate of weight loss.
Where the 1,000-Calorie Deficit Comes From
The classic rule of thumb is that one pound of body fat stores about 3,500 calories of energy. To lose 2 pounds in a week, you’d need to cut 7,000 calories over seven days, which works out to 1,000 per day. The Mayo Clinic notes this formula isn’t perfectly accurate for everyone, since your body doesn’t burn fat in a neat, predictable way. But it remains a useful starting point for setting a daily target.
The key number you need is your total daily energy expenditure, or the total calories your body burns in a full day including all movement and exercise. Subtract 1,000 from that number, and you have your daily calorie goal.
How to Estimate Your Daily Burn
Your body burns calories in two layers. The first is your basal metabolic rate (BMR), the energy your body uses just to stay alive: breathing, circulating blood, maintaining body temperature. The second layer is everything you do on top of that, from walking to the kitchen to running five miles.
The most widely used formula for BMR is the Mifflin-St Jeor equation. For women, it multiplies your weight in kilograms by 10, adds your height in centimeters times 6.25, subtracts your age in years times 5, then subtracts 161. For men, the math is the same except you add 5 instead of subtracting 161. To convert: divide your weight in pounds by 2.2 for kilograms, and multiply your height in inches by 2.54 for centimeters.
Once you have your BMR, multiply it by an activity factor to get your total daily burn. The standard multipliers range from 1.2 for someone with a desk job who doesn’t exercise, up to 1.9 for someone with a physically demanding job who also trains hard. Most people fall between 1.4 and 1.6. A 40-year-old woman who weighs 180 pounds, stands 5’5″, and exercises moderately might have a BMR around 1,500 calories and a total daily burn near 2,100. At a 1,000-calorie deficit, her target would be about 1,100 calories per day, which is actually below safe minimums.
The Minimum Calorie Floor
This is where a 2-pound-per-week goal runs into a hard limit. Harvard Health Publishing recommends that women eat no fewer than 1,200 calories per day and men no fewer than 1,500, unless supervised by a healthcare provider. Eating below those thresholds makes it very difficult to get adequate vitamins, minerals, fiber, and protein from food alone.
If your total daily burn is only 2,000 calories, a 1,000-calorie deficit drops you to 1,000 per day. That’s too low. In practical terms, a 2-pound-per-week goal through diet alone is only realistic if your total daily expenditure is at least 2,200 calories (for women) or 2,500 (for men). If yours is lower, you’ll need to either increase your activity level to raise the burn side of the equation, or aim for a more moderate loss of 1 to 1.5 pounds per week.
A Worked Example
Take a 35-year-old man who weighs 220 pounds (100 kg), stands 5’10” (178 cm), and has a lightly active lifestyle (activity multiplier of 1.4). His BMR using the Mifflin-St Jeor equation is roughly 2,000 calories. Multiplied by 1.4, his total daily burn comes to about 2,800 calories. Subtract 1,000, and his daily target is around 1,800 calories. That’s well above the 1,500-calorie floor, making 2 pounds per week a feasible goal for him.
Now consider a 45-year-old sedentary woman who weighs 150 pounds (68 kg) and stands 5’4″ (163 cm). Her BMR is roughly 1,330 calories, and at a sedentary multiplier of 1.2, her total daily burn is about 1,600. A 1,000-calorie deficit would put her at 600 calories per day, which is dangerously low. Even at 1,200 calories, she’d only have a 400-calorie daily deficit, translating to less than a pound per week. For her, adding regular exercise is the only safe path toward a larger weekly loss.
Why the First Weeks Feel Faster
Many people lose more than 2 pounds during their first week or two of a deficit, then see the pace slow down. This isn’t a sign that anything is going wrong. Your muscles and liver store a carbohydrate called glycogen, which holds onto water. When you cut calories, your body taps into those glycogen stores early on, releasing the water along with them. That initial drop on the scale is largely water weight, not fat.
As weeks pass, a second factor kicks in. When you lose weight, you lose some muscle along with fat. Since muscle tissue burns more calories at rest than fat does, your metabolic rate gradually decreases. Your smaller body simply needs less energy to operate. The Mayo Clinic describes this as the point where the calories you eat start to equal the calories you burn, creating a plateau. At that point, you either need to eat a little less, move a little more, or accept a slower rate of loss.
Risks of Losing Weight Too Fast
Two pounds per week is generally considered the upper limit of safe weight loss for a reason. Pushing beyond that, especially through very low calorie diets, increases the risk of gallstones. The National Institute of Diabetes and Digestive and Kidney Diseases explains that rapid weight loss causes the liver to release extra cholesterol into bile and can prevent the gallbladder from emptying properly. Both of these changes encourage gallstone formation. The risk is higher if you already have gallstones (even symptom-free ones), carry a large amount of excess weight, or have a history of weight cycling, where you repeatedly lose and regain weight.
Beyond gallstones, aggressive deficits can lead to fatigue, irritability, hair thinning, and nutrient deficiencies. They also make it harder to maintain the weight loss long-term. The CDC’s recommendation of 1 to 2 pounds per week isn’t just about safety during the loss phase. People who lose weight gradually are more likely to keep it off.
Protecting Muscle During a Deficit
The bigger your calorie deficit, the more muscle you risk losing alongside fat. Muscle loss slows your metabolism, makes you weaker, and changes your body composition in ways that make regain more likely. Two strategies help preserve it.
The first is protein. Research published in the International Journal of Sport Nutrition and Exercise Metabolism recommends 1.6 to 2.4 grams of protein per kilogram of body weight per day during a calorie deficit. For a 180-pound person (about 82 kg), that translates to roughly 130 to 195 grams of protein daily. That’s a meaningful amount. It means making protein the centerpiece of most meals: eggs, Greek yogurt, chicken, fish, legumes, or protein supplements if needed.
The second is resistance training. Lifting weights or doing bodyweight exercises signals your body to hold onto muscle tissue even when calories are scarce. Cardio helps widen your calorie deficit, but it doesn’t send the same “keep this muscle” signal. Ideally, you’d do both, but if you have to choose, strength training does more for body composition during weight loss.
Making the Deficit Sustainable
A 1,000-calorie daily deficit is large enough that it will be noticeable. You’ll feel hungrier than usual, at least for the first couple of weeks. A few practical choices can make it more manageable.
Splitting the deficit between eating less and moving more tends to be easier than doing it all through food restriction. Cutting 600 calories from your diet and burning an extra 400 through exercise gives you the same 1,000-calorie gap with more food on your plate. High-volume, low-calorie foods like vegetables, broth-based soups, and fruits help you feel full on fewer calories. Protein and fiber slow digestion and reduce hunger between meals. And tracking your intake, at least for the first few weeks, helps you see where your calories are actually coming from. Most people significantly underestimate how much they eat until they start measuring.
If you find that a 1,000-calorie deficit leaves you exhausted, constantly hungry, or unable to concentrate, that’s a sign the pace is too aggressive for your body. Dropping to a 750-calorie deficit (about 1.5 pounds per week) still produces meaningful results with considerably less strain.