Weight Loss Calorie Calculator

How Many Calories to Lose Weight

Weight loss requires a calorie deficit – eating fewer calories than your body burns. This calculator estimates the daily calorie intake needed to reach your goal weight by a target date. It factors in your current weight, height, age, sex, and activity level to determine your maintenance calories, then applies the appropriate deficit to meet your timeline. A safe rate of loss is 0.5 to 2 pounds per week, depending on how much weight you need to lose.

Setting a Realistic Calorie Target

A 500-calorie daily deficit produces roughly 1 pound of fat loss per week. A 1,000-calorie deficit doubles that to about 2 pounds per week, which is the maximum recommended rate for most people. Going below 1,200 calories per day (women) or 1,500 (men) is not recommended without medical supervision because it becomes difficult to meet nutritional needs at lower intakes. If your goal requires a deficit larger than 1,000 calories per day, extend the timeline rather than restricting more aggressively.

Why Calorie Needs Decrease as You Lose Weight

A smaller body burns fewer calories. Someone at 200 pounds has a higher maintenance level than the same person at 170 pounds. This means the calorie intake that produced a deficit at your starting weight may only maintain your lower weight. Recalculate every 10–15 pounds of loss to keep the deficit active. Plateaus lasting more than 2–3 weeks usually signal that your calorie target needs adjustment or that tracking accuracy has drifted.

Combining Diet and Exercise

The most sustainable approach splits the deficit between eating less and moving more. Cutting 300 calories from food and burning 200 through exercise creates a 500-calorie deficit with less dietary restriction than cutting 500 from food alone. Strength training during weight loss is especially important because it preserves muscle mass, which keeps your metabolic rate higher and produces a more toned result at your goal weight.

Frequently asked questions