Counting calories: Get back to weight-loss basics (2024)

Counting calories: Get back to weight-loss basics

Weight control really boils down to one thing — calories. See what steps you can take to win the calorie battle.

By Mayo Clinic Staff

Even with all the diet plans out there, weight management still comes down to the calories you take in versus those you burn off during activity.

Popular fad diets may promise you that not eating carbohydrates (carbs) or eating a pile of grapefruit is the secret to weight loss. But it really comes down to eating fewer calories than your body is using if you want to lose weight.

Calories: Fuel for your body

Calories are the energy in food. Your body has a constant demand for energy and uses the calories from food to keep working. Energy from calories fuels your every action, from fidgeting to marathon running.

Carbohydrates, fats and proteins are the types of nutrients that have calories and are the main energy sources for your body. No matter where they come from, the calories you eat are either converted to physical energy or stored within your body as fat.

These stored calories will stay in your body as fat unless you use them up. You can do this by cutting how many calories you take in so that your body must draw on reserves for energy. Or you can add more physical activity so that you burn more calories.

Tipping the scale

Your weight is a balancing act, but the equation is simple. If you eat more calories than you burn, you gain weight. And if you eat fewer calories and burn more calories through physical activity, you lose weight.

In the past, research found about 3,500 calories of energy equaled about 1 pound (0.45 kilogram) of fat. So researchers thought burning or cutting 500 calories a day led to losing 1 pound a week. But this isn't true for everyone.

In general, if you cut about 500 calories a day from your usual diet, you may lose about ½ to 1 pound a week. But this can vary depending on your body, how much weight you want to lose, your gender and activity level.

It sounds simple. But it's more difficult because when you lose weight, you usually lose a mix of fat, lean tissue and water. Also, because of changes that occur in the body as a cause of weight loss, you may need to decrease calories more to keep losing weight.

Cutting calories

Cutting calories needs to include change, but it doesn't have to be hard. These changes can have a big impact on the number of calories you take in:

  • Skipping high-calorie, low-nutrition items
  • Swapping high-calorie foods for lower calorie choices
  • Cutting portion sizes

Saving calories by cutting high-calorie, low-nutrition items

Skipping one or two high-calorie items is a good place to start when cutting calories. For example, you could skip your morning latte, soda at lunch or that evening bowl of ice cream.

Think about what you eat and drink each day and find items you could cut out. If you think that skipping your treat will leave you with a craving, swap it with a low-calorie choice.

Healthier choices
Instead of this... Calories* Try this... Calories*
*Actual calories may vary by brand.
Flavored latte, 16 ounces 268 Black coffee, 16 ounces 5
Chocolate ice cream, 1 cup 292 Strawberries, 1 1/2 cups whole 69
Lemon-lime soda, 16 ounces 210 Sparkling water, 16 ounces 0

Swapping high-calorie foods for lower calorie choices

Simple swaps can make a big difference when it comes to cutting calories. For example, you can save 60 calories a glass by drinking fat-free milk instead of whole milk. Instead of having a second slice of pizza, reach for some fresh fruit. Or snack on air-popped popcorn instead of chips. Eat more fruits and vegetables, which have many nutrients and are high in fiber. And they'll fill you up more than high-fat choices.

Lower calorie choices
Instead of this... Calories* Try this... Calories*
*Actual calories may vary by brand.
Whole milk, 8 ounces 149 Skim milk, 8 ounces 91
Regular-crust pepperoni pizza, fast food, 2 slices (each slice equals 1/8 of a 14-inch restaurant pizza) 626 Regular-crust pepperoni pizza, fast food, 1 slice (1/8 of a 14-inch restaurant pizza), plus 2 cups grapes 437
Ranch-flavored tortilla chips, 1 snack bag (3 ounces) 426 3 1/2 cups popcorn, air-popped 109

Cutting your portion sizes

The sizes of your portions affect how many calories you're getting. Twice the amount of food can sometimes mean twice the number of calories. But some foods with fewer calories, such as many fruits and vegetables, can be eaten in larger portions.

It's common to guess that you eat less than you actually do, such as if you're dining out. Paying attention to your portions is a good way to control calories.

Portion sizes
A typical portion... Calories* A standard serving... Calories*
*Actual calories may vary by brand.
Orange juice, 8 ounces 112 Orange juice, 4 ounces 56
Buttermilk pancake, 6-inch diameter (77 grams) 175 Buttermilk pancake, 4-inch diameter (41 grams) 86
Whole-grain noodles, cooked, 1 1/2 cups 355 Whole-grain noodles, cooked, 1 cup 237

Try these tips to control portion sizes and cut calories:

  • Start small. At the start of a meal, take a little less than what you think you'll eat. If you're still hungry, eat more vegetables or fruit.
  • Eat from plates, not packages. Eating right from a container gives you no sense of how much you're eating. Seeing food on a plate or in a bowl keeps you aware of how much you're eating. Think about using a smaller plate or bowl.
  • Check food labels. Be sure to check the Nutrition Facts panel for the serving size and number of calories per serving. You may find that the small bag of chips you eat with lunch every day, for example, is two servings, not one. This means it's twice the calories you thought.
  • Use a calorie counter. Check out reputable resources that offer tools to count calories, such as websites or smartphone applications.

Putting it all together

Replacing high-calorie foods with lower calorie choices and cutting your portion sizes can help you cut calories and improve weight control. For a successful — and lasting — weight management plan, you also need to increase your physical activity. Combining regular activity and healthy eating will best help you get to and maintain a healthy weight.

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Jan. 18, 2023

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  2. Healthy eating for adults. U.S. Department of Agriculture. https://www.myplate.gov/tip-sheet/healthy-eating-adults. Accessed July 18, 2022.
  3. Colditz GA. Healthy diet in adults. https://www.uptodate.com/contents/search. Accessed July 18, 2022.
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  6. Chau AM, et al. Dietary interventions for obesity: Clinical and mechanistic findings. The Journal of Clinical Investigation. 2021; doi:10.1172/JCI140065.
  7. Greger M. A whole food plant-based diet is effective for weight loss: The evidence. American Journal of Lifestyle Medicine. 2020; doi:10.1177/1559827620912400.
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  10. Learn how the nutrition facts label can help improve your health. Centers for Disease Control and Prevention. https://www.cdc.gov/nutrition/strategies-guidelines/nutrition-facts-label.html. Accessed July 18, 2022.
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See more In-depth

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  1. Calorie calculator
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  3. Weight-loss plateau
  4. Hidradenitis suppurativa: Tips for weight-loss success
  5. Keep the focus on your long-term vision
  6. Maintain a healthy weight with psoriatic arthritis
  7. BMI and waist circumference calculator
  8. Metabolism and weight loss
  9. Weight gain during menopause
  10. Weight-loss strategies
  11. Weight Loss After Breast Cancer

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Counting calories: Get back to weight-loss basics (2024)

FAQs

How does counting calories help to lose weight? ›

No matter where they come from, the calories you eat are either converted to physical energy or stored within your body as fat. These stored calories will stay in your body as fat unless you use them up. You can do this by cutting how many calories you take in so that your body must draw on reserves for energy.

How many calories should I cut back to lose weight? ›

No matter what type of diet you follow, to lose weight you need to burn more calories than you take in each day. For most people with overweight, cutting about 500 calories a day is a good place to start. If you can eat 500 fewer calories every day, you should lose about a pound (450 g) a week.

What happens if I only eat 500 calories a day for a month? ›

The greatest dangers associated with a 500-calorie diet relate to vitamin and mineral deficiencies. Vitamin and mineral deficiencies can lead to many health problems. In fact, most people cannot meet their vitamin and mineral requirements if they eat less than 1200 calories per day.

How to calculate how many calories you need to burn to lose weight? ›

To lose a pound, you need to burn the equivalent number of calories found in that pound. Common advice is to burn 3,500 more calories than you eat to drop one pound. To do this in one week, you need to create a calorie deficit of 500 calories each day.

Is it possible to lose 100 pounds in 3 months? ›

It's important to note that losing 100 pounds will likely take at least 6 months to a year or longer. Most experts recommend a slow but steady rate of weight loss — such as 1–2 pounds (0.5–1 kg) of fat loss, or around 1% of your body weight, per week (43).

How many calories should I cut a day to lose 2 pounds a week? ›

But do you really know what's realistic? Over the long term, it's smart to aim for losing 1 to 2 pounds (0.5 to 1 kilogram) a week. Generally to lose 1 to 2 pounds a week, you need to burn 500 to 1,000 calories more than you consume each day, through a lower calorie diet and regular physical activity.

What are three diets experts say to avoid? ›

The worst diets for your health include raw food, low-carb plans, and weight-loss shakes, according to experts
  • The raw food diet was ranked the worst way to eat overall for the second year in a row.
  • Other diets deemed unhealthy include the low-carb Dukan diet, and plans like Slimfast and Herbalife.
Jan 3, 2024

How many calories should I cut to lose belly fat? ›

It tells you how many calories you need each day to maintain your weight, and you should reduce that figure by 500 calories to start reducing your weight and belly fat quite quickly.

How to get rid of tummy fat? ›

8 Ways to Lose Belly Fat and Live a Healthier Life
  1. Try curbing carbs instead of fats. ...
  2. Think eating plan, not diet. ...
  3. Keep moving. ...
  4. Lift weights. ...
  5. Become a label reader. ...
  6. Move away from processed foods. ...
  7. Focus on the way your clothes fit more than reading a scale. ...
  8. Hang out with health-focused friends.

Why am I gaining weight on 800 calories a day? ›

Decreased Muscle Mass. Your body composition may be another reason why you are still gaining weight while in a calorie deficit. If you have a higher body fat percentage and lower muscle mass, then you are probably burning fewer calories than if you had more muscle mass.

How to lose 10 pounds in a week? ›

To lose 10 pounds in one week, you'll need to burn between 3,500 and 5,000 calories more than you consume each day by restricting your diet to small portions of nutritious yet low-calorie foods, and significantly increasing your aerobic exercise with interval training, sports, and other vigorous activities.

What exercise burns the most calories? ›

Generally, running is the best calorie-burning exercise. But if you don't have enough time to go on a run, you can shorten your workout into high-intensity sprints. Your body will rapidly burn calories to fuel your workout. Before sprinting, warm up by doing jumping jacks or high-knee running.

How many calories should I eat to lose 1 pound a week? ›

1 pound, or approximately 0.45 kg, equates to about 3,500 calories. As such, in order to lose 1 pound per week, it is recommended that 500 calories be shaved off the estimate of calories necessary for weight maintenance per day.

How many calories to lose 3 pounds a week? ›

3 lb (1.4 kg) is equal to 10,500 calories, which means you'll need to cut 1,500 calories per day using diet and exercise. Once you know how many calories you burn in a day, subtract 1,500 from it to get your daily calorie goal.

How many calories should I count to lose weight per day? ›

In order to lose at least a pound a week, try to do at least 30 minutes of physical activity on most days, and reduce your daily calorie intake by at least 500 calories. However, calorie intake should not fall below 1,200 a day in women or 1,500 a day in men, except under the supervision of a health professional.

Should I count calories or just eat healthy? ›

Experts still agree that consuming fewer calories than you burn leads to weight loss. But there's no need to obsess about them. Instead, it can be more useful to have a general idea of how many calories you require to reach your goal—and which foods are more likely to help you get there.

What calorie deficit do I need to lose 2 pounds a week? ›

But do you really know what's realistic? Over the long term, it's smart to aim for losing 1 to 2 pounds (0.5 to 1 kilogram) a week. Generally to lose 1 to 2 pounds a week, you need to burn 500 to 1,000 calories more than you consume each day, through a lower calorie diet and regular physical activity.

Can I eat whatever I want as long as I count calories? ›

Technically, you can eat anything on a calorie deficit diet—as long as you eat in a deficit, Cording says. “But, that said, whatever you're eating needs to end up being less than the energy you expend,” she says.

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