Calorie Calculator

The Calorie Calculator estimates how many calories you should eat each day and gives straightforward tips for gaining or shedding weight.

Age	ages 15 - 80
Gender	male   female

Height	feet   inches
Weight	pounds

Height	cm
Weight	kg

Activity	Basal Metabolic Rate (BMR) Sedentary: little or no exercise Light: exercise 1-3 times/week Moderate: exercise 4-5 times/week Active: daily exercise or intense exercise 3-4 times/week Very Active: intense exercise 6-7 times/week Extra Active: very intense exercise daily, or physical job
	+ Settings Results unit: Calories   Kilojoules BMR estimation formula: Mifflin St Jeor Revised Harris-Benedict Katch-McArdle   Body Fat:

• Light activity: 15–30 minutes of moderate‑intensity cardio.
• Moderate activity: 45–120 minutes of vigorous cardio.
• High‑intensity activity: More than 2 hours of sustained elevated heart‑rate work.

Food Energy Converter

The following converter can be used to convert between Calories and other common food energy units.

The calculator relies on three well‑known formulas. The original Harris‑Benedict equation estimates basal metabolic rate (BMR) and was updated in 1984 for better accuracy. In the early ’90s the Mifflin‑St Jeor equation replaced it, providing a more precise BMR estimate for most people. The Katch‑McArdle formula differs by calculating resting daily energy expenditure (RDEE) and incorporates lean body mass, which can be advantageous for leaner individuals who know their body‑fat percentage. Of the three, Mifflin‑St Jeor is generally regarded as the most reliable, with Katch‑McArdle offering a niche benefit for those with detailed body‑composition data.

where:

These formulas give you a rough daily calorie target to keep your weight steady while at rest. Multiplying that figure by an activity multiplier—typically between 1.2 and 1.95—adjusts for your usual level of exercise. Because roughly 3,500 calories equal one pound (≈0.45 kg), cutting about 500 calories from your maintenance number each day should translate to a loss of one pound per week. For instance, a maintenance estimate of 2,500 kcal reduced to 2,000 kcal would theoretically shed 3,500 kcal (≈1 lb) over seven days.

While diet and exercise remain the cornerstone of healthy weight loss, dropping more than 1,000 calories per day is discouraged. Losing over 2 lb weekly can be unsafe, potentially causing muscle loss, a slower metabolism, and dehydration. When you combine training with a restricted diet, adequate nutrition becomes crucial to sustain metabolic functions and recovery. Extreme calorie cuts can lead to nutrient deficiencies, and weight lost this way is often regained as fat. Therefore, alongside calorie tracking, maintain sufficient fiber and essential nutrients to support overall health.

Calorie Counting as a Means for Weight Loss

Calorie counting with the intent of losing weight, on its simplest levels, can be broken down into a few general steps:

2. Calculate your BMR using one of the presented formulas. If you have an accurate body‑fat percentage, the Katch‑McArdle method may reflect your true resting energy expenditure more closely. Remember, these numbers are estimates; subtracting exactly 500 kcal won’t always equal a precise one‑pound loss per week.
4. Set your weight‑loss objectives. One pound (≈0.45 kg) corresponds to about 3,500 kcal, so a daily deficit of roughly 500 kcal should produce a weekly loss of one pound. Aim to keep the deficit under 2 lb per week (≈1,000 kcal) for safety. If you plan to exceed this, consult a physician or a registered dietitian nutritionist (RDN).
6. Pick a system to record your intake and monitor progress. Mobile apps, web tools, or even a simple spreadsheet can log foods, workouts, and milestones. Many apps include databases for popular brand items and restaurant dishes, while others let you input custom recipes. If digital tools aren’t your style, a paper journal works just as well.
8. Review your results periodically and adjust as needed. Weight alone doesn’t tell the whole story; consider changes in body‑fat versus muscle. Weekly weigh‑ins (preferably after waking and before breakfast) give a more reliable trend than daily fluctuations caused by hydration or time of day.
9. Keep at it!

These steps outline a basic approach to calorie tracking. The method isn’t exact science; you can add complexity by accounting for macronutrient ratios. While there’s no universally perfect split of fats, proteins, and carbs, a balanced intake of minimally processed plant and animal foods generally supports sustainable weight management.

There are many approaches to weight loss and there is no set ideal method that works for all people, which is why so many different diets and exercise regimens exist. While some methods are more effective for each individual person, not all weight loss methods are equivalent, and studies suggest that some approaches are healthier than others. That being said, one of the most commonly effective weight loss methods is counting calories. In its most basic form, calories consumed minus calories expended will result in weight gain if the result is positive, or weight loss if the result is negative. However, this is far from a comprehensive picture, and many other factors play a role in affecting healthy, sustainable weight loss. For example, there exist conflicting studies addressing whether or not the type of calories or foods consumed, or how they are consumed, affects weight loss. Studies have shown that foods that require a person to chew more and are more difficult to digest result in the body burning more calories, sometimes referred to as the thermic effect of food. While the increase in burned calories may be marginal, foods that are more difficult to digest such as vegetables generally tend to be healthier and provide more nutrients for fewer calories than many processed foods.

Consistent with the view that in regards to weight loss, only net calories are important and not their source, there exist cases such as the Twinkie diet, where a person that solely counted calories while eating a variety of cake snacks managed to lose 27 pounds over two months. As effective as this can be, it is certainly not suggested. While the participant did not seem to suffer any noticeable health detriments in this particular case, there are other less measurable factors that should be considered such as long-term effects of such a diet on potential for developing cancers, heart disease, and diabetes. However, ignoring efficiency and health, sustained, significant reduction of caloric intake or increase of physical activity should result in weight loss, and counting calories can be an effective way to achieve this sole result.

Aside from being one viable method for facilitating weight loss, calorie counting has other somewhat less quantifiable advantages including helping to increase nutritional awareness. Many people are completely unaware of, or grossly underestimate their daily caloric intake. Counting calories can help raise awareness of different types of foods, the number of calories they contain, and how these calories have a different effect on a person's feelings of satiety. Once a person has a better understanding of how many calories are actually in that bag of chips that they can so easily inhale within minutes, how much of their daily caloric intake it consumes, and how little the chips do to satiate their hunger, portion control and avoidance of foods with empty calories tends to become easier.

Having actual caloric measurements can also assist in weight loss, since tangible calorie goals can be set, rather than simply trying to eat less. Also, although this is not necessarily directly related to calorie counting, studies have shown that portion control by simply eating from a smaller plate can help reduce calorie intake, since people tend to fill their plates and eat everything on their plates. Many people do not realize that they are overeating, since they have become accustomed to restaurant-sized portions being the norm, when said portions can be up to three or more times larger than necessary for a typical meal.

Tracking calories also puts exercise in a quantifiable perspective, increasing a person's awareness regarding how much exercise is really required to counteract a 220-calorie bag of M&M's. Once a link is made between the amount of exercise that some snack equates to, many people find abstaining from that bag of chips to be the preferred option rather than performing an equivalent amount of exercise – which can lead to healthier eating habits.

In the end, however, what's important is picking a strategy that works for you. Calorie counting is only one method used to achieve weight loss amongst many, and even within this method, there are many possible approaches a person can take. Finding an approach that fits within your lifestyle that you think you would be able to adhere to is likely going to provide the most sustainable option and desirable result.

Zigzag Calorie Cycling

Zigzag calorie cycling is a weight loss approach that aims to counteract the human body's natural adaptive tendencies. Counting and restricting calories, as described above, is a viable method to lose weight, but over a period of time, it is possible for the body to adapt to the lower number of calories consumed. In cases where this happens, a plateau in weight loss that can be difficult to surmount can result. This is where zigzag calorie cycling can help, by not allowing the body to adapt to the lower calorie environment.

Zigzag calorie cycling involves alternating the number of calories consumed on a given day. A person on a zigzag diet should have a combination of high-calorie and low-calorie days to meet the same overall weekly calorie target. For example, if your target calorie intake is 14,000 calories per week, you could consume 2,300 calories three days a week, and 1,775 the other four days of the week, or you could consume 2,000 calories each day. In both cases, 14,000 calories would be consumed over the week, but the body wouldn't adapt and compensate for a 2,000-calorie diet. This also allows a person more flexibility in their diet, allowing them to plan around occasions, such as work or family gatherings, where a person may consume more calories. Consuming a lower number of calories on other days can allow a person to enjoy these gatherings or even have a "cheat day" where they eat whatever they want without feeling guilty, since they can make up for the excess calories on their low-calorie days.

There is no concrete rule or study that dictates the most effective way to alternate or spread out calorie consumption. How to vary calorie intake is largely up to personal discretion. Depending on a person's activity, it is generally recommended that the high-calorie and low-calorie days vary by approximately 200-300 calories, where the high-calorie day is often the number of calories a person needs to consume to maintain their current weight. For a person with a higher activity level, the calorie difference should be larger. The calculator presents two zigzag diet schedules. The first schedule has two higher calorie days and five lower calorie days. The second schedule increases and reduces calories gradually. In either case, the total weekly calorie consumption is the same.

In the end, regardless of what method you choose to use when approaching weight loss, what's important is picking a strategy that works for you. Calorie counting and zigzag calorie cycling are only two methods (that are fairly interrelated) used to achieve weight loss among many, and even within these methods, there are many possible approaches a person can take. Finding an approach that fits within your lifestyle that you think you would be able to adhere to is likely going to provide the most sustainable and desirable result.

How Many Calories Do You Need?

Many people seek to lose weight, and often the easiest way to do this is to consume fewer calories each day. But how many calories does the body actually need in order to be healthy? This largely depends on the amount of physical activity a person performs each day, and regardless of this, is different for all people – there are many different factors involved, not all of which are well-understood or known.

Several variables determine how many calories a person should consume to stay healthy, such as age, weight, height, gender, activity level, and overall health. For instance, an active 25‑year‑old man who is 6 ft tall needs far more energy than a sedentary 70‑year‑old woman who stands 5 ft tall. While exact numbers vary with age and exercise, typical adult men need roughly 2,000‑3,000 kcal per day, whereas adult women usually require about 1,600‑2,400 kcal, according to U.S. health guidelines.

The body only needs a modest amount of energy to keep basic functions alive, but eating too little can impair performance because the body will prioritize survival over optimal health. Harvard Health notes that women should not dip below about 1,200 kcal daily and men below about 1,500 kcal unless overseen by a professional. Therefore, anyone trying to lose weight should regularly assess their personal caloric needs and adjust intake to meet nutritional requirements.

Calories: Different Kinds and Their Effects

Typical diets obtain energy mainly from carbohydrates, proteins and fats, with alcohol also contributing a notable share of calories for many people (though it should be limited because it offers mostly empty calories). Research shows that the calories printed on nutrition labels can differ markedly from the amount actually absorbed, underscoring how complex nutrition can be and why experts disagree on the best weight‑loss strategy. For example, the more a person chews, the more energy is expended during digestion, and prolonged chewing often leads to earlier satiety, which can reduce overall intake. These chewing‑related effects are not fully understood and should be regarded cautiously, especially when the goal is weight loss.

Foods that demand considerable chewing—such as fresh fruit, vegetables, lean meats and whole grains—force the body to expend extra energy to break them down, which can boost the feeling of fullness for a longer period. Moreover, items like coffee, tea, chili peppers, cinnamon and ginger have been shown to slightly raise metabolic rate thanks to their active compounds.

Not all calories are equal; they can be grouped into high‑density, low‑density and “empty” categories. High‑density foods pack many calories into a small portion (think oils, fried items or sugary treats), though some—like avocados, nuts, quinoa or whole grains—are nutritious when eaten in moderation. Low‑density options, such as most vegetables and many fruits, provide fewer calories per serving. Empty calories come from added sugars and solid fats, delivering little nutritional value. Studies reveal that 500 kcal of carrots feels different from 500 kcal of popcorn because carrots require more chewing and thus a higher thermic effect. While there is no universally ideal macronutrient split, a diet rich in minimally processed plant and animal foods (vegetables, fruits, lean proteins) is linked to better health and more sustainable weight loss. Remember that beverages can account for about one‑fifth of daily calories, often as empty calories; soda is an obvious source, but sweetened juices and even milk can add significant sugar. Opt for water, unsweetened tea or coffee to keep liquid calories low.

Everything should be eaten in moderation, even foods marketed as “healthy.” Natural items like fruit can still be high in sugar, and products labeled low‑fat or reduced‑calorie often compensate with added sweeteners. It’s crucial to read ingredient lists and understand what each component contributes before deciding if a food fits into your eating plan.

Calories in Common Foods

* 1 cup = ~250 milliliters, 1 table spoon = 14.2 gram

2000, 1500, and 1200 Calorie Sample Meal Plans

Calories Burned from Common Exercises:

Energy from Common Food Components