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The Calorie Calculator can be used to estimate the number of calories a person needs to consume each day. This calculator can also provide some simple guidelines for gaining or losing weight.
The following converter can be used to convert between Calories and other common food energy units. Related: BMI Calculator Body Fat Calculator Ideal Weight Calculator. This Calorie Calculator is based on several equations, and the results of the calculator are based on an estimated average. The Harris-Benedict Equation was one of the earliest equations used to calculate basal metabolic rate BMR , which is the amount of energy expended per day at rest.
It was revised in to be more accurate and was used up until , when the Mifflin-St Jeor Equation was introduced. The Mifflin-St Jeor Equation also calculates BMR, and has been shown to be more accurate than the revised Harris-Benedict Equation. The Katch-McArdle Formula is slightly different in that it calculates resting daily energy expenditure RDEE , which takes lean body mass into account, something that neither the Mifflin-St Jeor nor the Harris-Benedict Equation do.
Of these equations, the Mifflin-St Jeor Equation is considered the most accurate equation for calculating BMR with the exception that the Katch-McArdle Formula can be more accurate for people who are leaner and know their body fat percentage.
The three equations used by the calculator are listed below:. where: W is body weight in kg H is body height in cm A is age F is body fat in percentage. The value obtained from these equations is the estimated number of calories a person can consume in a day to maintain their body-weight, assuming they remain at rest.
This value is multiplied by an activity factor generally 1. As such, in order to lose 1 pound per week, it is recommended that calories be shaved off the estimate of calories necessary for weight maintenance per day.
For example, if a person has an estimated allotment of 2, calories per day to maintain body-weight, consuming 2, calories per day for one week would theoretically result in 3, calories or 1 pound lost during the period. It is important to remember that proper diet and exercise is largely accepted as the best way to lose weight. It is inadvisable to lower calorie intake by more than 1, calories per day, as losing more than 2 pounds per week can be unhealthy, and can result in the opposite effect in the near future by reducing metabolism.
Losing more than 2 pounds a week will likely involve muscle loss, which in turn lowers BMR, since more muscle mass results in higher BMR. Excessive weight loss can also be due to dehydration, which is unhealthy. Furthermore, particularly when exercising in conjunction with dieting, maintaining a good diet is important, since the body needs to be able to support its metabolic processes and replenish itself.
Depriving the body of the nutrients it requires as part of heavily unhealthy diets can have serious detrimental effects, and weight lost in this manner has been shown in some studies to be unsustainable, since the weight is often regained in the form of fat putting the participant in a worse state than when beginning the diet. As such, in addition to monitoring calorie intake, it is important to maintain levels of fiber intake as well as other nutritional necessities to balance the needs of the body.
Calorie counting with the intent of losing weight, on its simplest levels, can be broken down into a few general steps:. The above steps are an attempt at the most basic form of calorie counting. Calorie counting is not an exact science, and can be as complex as you want to make it. The above does not consider the proportions of macronutrients consumed.
While there is no exactly known, ideal proportion of macronutrients fats, proteins, carbohydrates , some balance is certainly advisable, and different foods have been found to have different effects on health, feelings of hunger, and number of calories burned. Generally, minimally processed plant and animal foods tend to be more conducive to healthy weight loss and maintenance.
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. 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 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, calories per week, you could consume 2, calories three days a week, and 1, the other four days of the week, or you could consume 2, calories each day. In both cases, 14, calories would be consumed over the week, but the body wouldn't adapt and compensate for a 2,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 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. 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.
Some factors that influence the number of calories a person needs to remain healthy include age, weight, height, sex, levels of physical activity, and overall general health. For example, a physically active year-old male that is 6 feet in height requires considerably higher calorie intake than a 5-foot-tall, sedentary year-old woman. Though it differs depending on age and activity level, adult males generally require 2, calories per day to maintain weight while adult females need around 1,, according to the U.
S Department of Health. The body does not require many calories to simply survive. However, consuming too few calories results in the body functioning poorly, since it will only use calories for functions essential to survival, and ignore those necessary for general health and well-being.
Harvard Health Publications suggests women get at least 1, calories and men get at least 1, calories a day unless supervised by doctors. As such, it is highly recommended that a person attempting to lose weight monitors their body's caloric necessities and adjusts them as necessary to maintain its nutritional needs.
The main sources of calories in a typical person's diet are carbohydrates, proteins, and fat, with alcohol also being a significant portion of calorie intake for many people though ideally this should be limited since alcohol contains many empty calories. Some studies have shown that the calories displayed on nutrition labels and the calories actually consumed and retained can vary significantly. This hints at the complex nature of calories and nutrition and is why many conflicting points of view on the "best" methodology for losing weight exist.
For example, how a person chews their food has been shown to affect weight loss to some degree; generally speaking, chewing food more increases the number of calories that the body burns during digestion. People that chew more also tend to eat less, since the longer period of time necessary to chew their food allows more time to reach a state of satiety, which results in eating less. However, the effects of how food is chewed and digestion of different foods are not completely understood and it is possible that other factors exist, and thus this information should be taken with a grain of salt in moderation if weight loss is the goal.
Generally, foods that take more effort to chew — fruit, vegetables, lean meats, whole grains, etc. It also results in the feeling of satiety for longer periods of time.
Furthermore, certain foods like coffee, tea, chilies, cinnamon, and ginger have been found to increase the rate of calories burned, due to the ingredients they contain. The "quality" of calories consumed is also important. There are different classifications of foods in terms of calories. This includes high-calorie foods, low-calorie foods, and empty calories. Consistent with their naming, high-calorie foods are foods that are calorically dense, meaning that there are a high number of calories relative to serving size, while low-calorie foods have fewer calories relative to serving size.
Foods such as fat, oils, fried foods, and sugary foods are examples of high-calorie foods. Being a high-calorie food does not inherently mean that the food is unhealthy however — avocados, quinoa, nuts, and whole grains are all high-calorie foods that are considered healthful in moderation.
Upfit Calorie Deficit Calculator - Chrome ウェブストア - Calorie Counting as a Means for Weight Loss
Use this calorie calculator for weight loss to estimate how many calories you need to cut down on in order to achieve a given weight loss target, depending on whether or not you want to change your physical exercise level as well. The calculator will also suggest mixed regime of caloric reduction and more intensive exercise. This is a question many people attempt to answer when they set off to shed some of the extra weight to improve their current and future health outcomes, well-being and potentially self-esteem and happiness.
While this is a good question to ask, you should also be open to the opportunity of supplementing a caloric intake reduction with an increase in physical activity like fitness exercises, running, etc. According to the conservation of energy law in order to reduce your body weight, which is effectively stored energy, you need to induce a caloric deficit by either increasing your energy expenditure or by decreasing the number of calories you consume daily.
This weight loss rule is ubiquitously known as the " kCal per pound rule" which is, unfortunately, very imprecise as it was "derived by estimation of the energy content of weight lost but it ignores dynamic physiological adaptations to altered body weight that lead to changes of both the resting metabolic rate as well as the energy cost of physical activity" [1]. Weight loss works differently for persons of average weight, for the obese and for the extremely obese. Losing 5 pounds is also different than losing 50 pounds.
You can read more on this in our "how many calories to lose weight" section below. In our weight loss calculator above we have incorporated a dynamic model which estimates how many calories you would need to reduce your daily intake by in order to achieve a given weight loss goal.
It allows you to also specify if you intend to change your level of physical activity and adjusts the estimate accordingly. You can see more details on the mathematics and statistics behind this calorie calculator for weight loss as well as the daily energy expenditure and body fat estimates used in it in the "How it works" section. We stick to this convention for most of this page.
This tool computes the difference between your caloric intake and energy expenditure in order to estimate the number of calories you need to consume daily if you want to achieve your body weight target. Calculation of Total Daily Energy Expenditure a. Total Energy Expenditure and Body Fat Percentage is done using the formulas described in our respective dedicated calculators.
You can find the formulas and references for them under each tool. The computation of the proportion of energy intake which needs to be cut down is performed in several steps.
First, we compute the proportion of fat mass FM and fat free mass FFM which you are expected to lose since variability in this proportion can result in large differences in required caloric intake restriction. It is known that persons with a larger percentage of body fat usually lose a larger proportion of fat versus fat-free mass, which requires a larger energy deficit to achieve.
We have chosen to compute this based on the Forbes formula improved on by Hall [2][3]. The advantages of this formula over the original Forbes formula for the proportion of fat mass lost under limited caloric intake is that the refined version of Hall is valid for macroscopic changes and has better predictive capacity for real-life weight loss, including very fast weight loss e. following a bariatric surgery. This happens as, unlike the original, it depends on the sign and magnitude of the body weight change.
The latter are primarily proteins since carbohydrates fluctuate only in very short time spans due to the limited glycogen storage capacity. In the above notation in formula 1 simplified vs the original c l and c f are energy density constants for fat and fat-free mass, dt is duration of the weight loss period in days.
Formula 2 simply demonstrates the relationship between the proportional change, the energy intake and the energy expenditure, which allows the weight loss planning calculator to work. The most important factor here is that the ratio between the two constants is about 9.
The implication for calorie calculation for weight loss is that the number of calorie reduction depends significantly on the proportion of fats in the amount of body weight which is lost. If you are off even by a relatively small percent, the final result can differ by a lot. It also means that it is much harder to lose an equivalent weight if you are more obese: you would need to restrict your caloric intake by a significantly greater amount in order to lose the same amount of weight in pounds or kilograms.
It also explains why it is so hard to shed off the last few pounds of extra fat without also losing muscle mass. We used the calculator's daily calorie intake result to chart the number of calories one would need to cut to lose the same amount of weight. The results are presented in number of calories to lose one pound per week. The data below are just a case study and not a general recommendation. You can clearly see why the 3, calories per week "rule" is not a good guide, at least in this particular instance since it applies only to a very narrow range of all possible cases - the graph is for a mildly obese person with the specified measurements.
Using a tool like the above calorie reduction calculator allows you to get a much more precise estimate of how many calories you need to eat in order to lose weight. Weight loss is a complex topic since it is the intersection of biology, physics, psychology and others. Still, we can lay out some guiding principles based on sound logic and confirmed through numerous experiments. The first of these is the energy balance principle : the process of reducing body weight requires from us to expend more energy than we receive from food and beverages.
If we fail to do so, the excess energy which cannot be disposed of is stored for future use, mostly as adipose tissue and fats. Thus, our first goal is to have a negative energy balance, an energy deficit between what we consume and what we expend. This can happen in one of two ways: either reducing the amount of calories we eat, or by increasing the amount of physical activity. We can reduce the number of calories by simply eating less mass, or we can change our dietary macronutrient balance in order to consume less fats high energy density and more carbs and proteins.
Since there is a sort of an upper limit to the amount of proteins we can eat in choosing the second option we often reduce fats and increase carbohydrates. There are low-carb diets such as Keto which shift the balance the other way.
Evidence [5] points to this leading to losing less fats when dieting, even though one loses more weight overall, which is not good since fats are what is hard to get rid of and which is, at the same time, most beneficial to get rid of, so it appears that reducing fat intake and thus the overall caloric intake is the preferred way, in general. Going to the exercise option: most increases in physical activity, including micro-movements when otherwise sedentary, will contribute towards a greater energy expenditure and thus a possible reduction in weight loss.
Most papers on the topic favor resistance training in particular. Physically active persons maintain a lighter and leaner body and a better health risk profile , sometimes even despite increased caloric intake. Keeping your physical activity high is also a way to slow down the weight gain observed as people get older, on average. Our weight loss calorie calculator needs up to four of your measurements: height, neck, waist, and hips , to determine the percentage and mass of body fat which is integral in estimating the number of calories you need to forgo on a daily basis in order to achieve weight loss.
Here is how to take the measurements, using a soft measurement tape:. You can use both centimeters and inches to record the measurement, since our software supports both units.
Accuracy to the nearest half inch or within 1 cm should be sufficient. It is recommended that you wear minimal clothing during the measurement. It is also recommended to have your measures taken by an assistant, since if you are taking them yourself you will not be fully relaxed and may be twisting your body and skewing the results. While using our tool can be a first step in such a process, it is a tool based on statistical models derived from population averages and cannot, for obvious reasons, account for your personal health history, diet history, body specifics, and other factors which might influence the choice of optimal diet for you.
et al. If you'd like to cite this online calculator resource and information as provided on the page, you can use the following citation: Georgiev G. php URL [Accessed Date: 01 Nov, ]. Calculators Converters Randomizers Articles Search. GIGA Calculators Health Weight Loss Calculator. Weight Loss Calculator Use this calorie calculator for weight loss to estimate how many calories you need to cut down on in order to achieve a given weight loss target, depending on whether or not you want to change your physical exercise level as well.
Unit system. Imperial feet and inches, pounds. Metric cm and meters, kg. kg pounds. Current activity level. Sedentary little or no exercise Light exercise times a week Moderate exercise times a week High heavy exercise times a week Extreme very heavy exercise or physical job. Target weight. Time to achieve target. days weeks months years. Future activity level. Share calculator:. Embed this tool: get code. Related calculators Healthy Weight BMI Calculator Ideal Weight Macro Calculator.
Quick navigation:. References [1] Hall K. Health calculators BMI Calculator Calorie Calculator Weight Loss Calculator Water Intake Calculator Height Calculator Body Fat Calculator BMR Calculator RMR Calculator Healthy Weight Calculator Ideal Weight Calculator Army Body Fat Calculator Lean Body Mass Calculator Keto Calculator Height Percentile Calculator Body Surface Area Calculator Thermic Effect of Food Calculator.
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