How to Set Calorie Goals for Weight Loss (2026)

Before you calculate anything, decide how fast you want to lose, and be realistic about what you can keep up. The CDC notes that people who lose about 1 to 2 pounds a week are more likely to keep it off than people who lose faster. Faster loss usually takes aggressive deficits that are harder to hold and more likely to cost muscle along with fat. For a 200-pound person, 1 to 2 pounds a week is 0.5 to 1% of body weight.

Plan in 3- to 6-month blocks rather than chasing a final number. A 5 to 10% loss is a meaningful clinical goal. In people with obesity, a 2023 JAMA review reports that 5 to 10% loss lowers systolic blood pressure by about 3 mm Hg in people with hypertension and can lower hemoglobin A1c by 0.6 to 1% in type 2 diabetes. At 200 pounds, that is 10 to 20 pounds over several months, not your high school weight by summer.

Slower loss is always acceptable. If half a pound a week fits your life better, you still get there, and you are more likely to stay there.

Your Total Daily Energy Expenditure (TDEE) is the calories you burn on a typical day, the baseline before any deficit. The most common approach uses the Mifflin-St Jeor equation to estimate your resting metabolic rate, then multiplies by an activity factor.

Men: (10 x weight in kg) + (6.25 x height in cm) minus (5 x age) + 5. Women: the same, but minus 161 instead of plus 5.

If math isn't your thing, the NIH Body Weight Planner does it for you and, more important, accounts for how your needs change as you lose. That makes it more realistic than a calculator that gives one number and leaves you wondering why progress stalls at week six.

A reality check: equations are a starting point, and your true needs can differ a lot from the estimate, especially with overweight or obesity. In a 2022 review of 61 studies of adults with overweight or obesity, even the most precise equation was accurate for only about 6 in 10 people. Use 2 to 4 weeks of real-world data to fine-tune your number.

Once you know your maintenance calories, the deficit is subtraction. The AHA/ACC/TOS obesity guideline uses a deficit of 500 or 750 calories a day as one standard approach. By the static math, that is 3,500 to 5,250 calories a week, or about 1 to 1.5 pounds, and in practice a little less as the months go on.

The same guideline lists a second approach: about 1,200 to 1,500 calories a day for women and 1,500 to 1,800 for men, adjusted for body weight. These are ranges, not rules. Your target depends on your size, activity and how aggressive you want to be.

Where you start changes how it feels. Someone with a TDEE of 2,800 can eat 2,300 calories for a 500-calorie deficit and barely notice. Someone with a TDEE of 1,800 has to eat 1,300 for the same deficit, which is much harder to sustain. Same math, very different days.

For most people, the sustainable path is a moderate deficit plus smart food choices. Our guide to what to eat for weight loss shows how to build plates that keep you full without blowing your calorie budget.

The calorie target is half the plan. What you eat inside it, and how you move, decides whether you lose mostly fat or a frustrating mix of fat and muscle.

Protein is a priority. Eating more protein during a deficit helps preserve lean mass and keeps you fuller. In a meta-analysis of 49 trials, protein's benefit for muscle with resistance training leveled off at about 1.6 g/kg a day, with an upper bound near 2.2. In a 2024 review of adults with overweight or obesity aiming to lose weight, intakes above about 1.3 g/kg were expected to increase muscle mass and below 1.0 g/kg carried a higher risk of losing it. A practical target for many people is about 1.2 to 1.6 g/kg a day. For a 150-pound (68 kg) person, that is about 80 to 110 grams a day, up to about 150 at 2.2 g/kg, spread across meals.

If you are not sure how to fit that much protein into a week, our Complete Meal Prep Guide shows how to batch-cook it without eating plain chicken breast at every meal.

Fiber keeps you satisfied. The simplest guideline is 14 grams per 1,000 calories, from the Dietary Guidelines for Americans 2020 to 2025 nutrient goals. At 1,500 calories, that is about 21 grams. The current Dietary Guidelines also tell you to prioritize fiber-rich whole grains, alongside vegetables, fruit and legumes. In a meta-analysis of 62 trials, viscous fiber lowered body weight by an average of 0.33 kg. That is modest, and it is real. Our Ultimate Guide to Dietary Fiber covers why it deserves more attention.

Movement protects muscle and widens the deficit. Resistance training at least twice a week tells your body to keep muscle while you lose weight. Daily movement matters too: walking, stairs, standing more. This non-exercise activity thermogenesis, or NEAT, adds up. In one study cited in a review of NEAT, people with obesity sat about two hours a day longer than lean people, and matching the lean group's movement would burn about 350 more calories a day. Our Complete Exercise Guide for Weight Loss lays out how much exercise you need.

No calorie calculation is right on the first try. The number you start with is an educated guess, and real-world data tells you whether it works.

Weigh yourself 3 to 4 mornings a week under the same conditions and track the weekly average, not the daily number. Water weight can swing several pounds from day to day with sodium, carbohydrates, stress and sleep. The weekly trend is what counts.

Every 2 to 4 weeks, check your progress. If the average isn't moving, you have two options: cut another 100 to 200 calories a day, or add activity. Both work. Pick the one you can keep doing.

One guardrail most people ignore: if hunger becomes unmanageable, your energy tanks or your workouts suffer, you have pushed too hard. Shrink the deficit, add protein and fiber, or change your meal timing. A diet you can't stick with doesn't work, however neat the math looks.