Calorie Calculator — Find Out Your Daily Needs For 2024

Curious about how a calorie estimator works? Learn the science behind calorie calculators and how much you need per day in 2024.

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Have you ever tried counting calories but gave up a few days later? It’s not always easy, and it’s not for everyone. But knowing your daily caloric needs might help you manage your weight better.

For example, learning how many calories your body burns just to survive lets you understand how your food choices affect your weight. Also, watching calorie intake can increase eating awareness and aid habit change.

You can get an average idea by using an online calorie estimator. You can also find a calorie deficit calculator with suggestions for how many calories you need to lose weight

Learn how a calorie and weight loss calculator works and if tracking your calories is appropriate for you. Plus, smart tips for developing healthier habits for long-term weight management. 

How To Use This Calorie Calculator?

This calorie calculator uses the Mifflin-St Jeor Equation, the revised Harris-Benedict Equation, and the Katch-McArdle Formula. It calculates your basal metabolic rate or BMR. You only need to know your age, sex, height, weight, and activity level to get an approximation.

Learning how many calories your body needs to function at rest and with activity can help you understand your bodily needs better.

How Does This Calculator Work?

This calorie calculator uses three methods: The Mifflin-St Jeor Equation, the revised Harris-Benedict Equation, and the Katch-McArdle Formula. They estimate your basal metabolic rate[1] or BMR. 

What Does Basal Metabolic Rate, Or BMR, Mean?

Your BMR is the minimum amount of calories you need to function at rest – basically, what you need just to survive. 

It’s crucial to remember that it’s the minimum needed to stay functioning when your body isn’t moving. Your caloric needs increase as soon as you consider a regular day where you might go to work, run errands, or work out. 

Why Knowing Your BMR Can Help?

Knowing your BMR can help you understand what your body needs to lose, gain, or maintain your weight. For example, you can find your BMR and calculate the average number of calories burned during movement throughout the day. If your goal is to maintain your weight, you’ll have a better idea of what you need to eat to avoid a calorie deficit or gain. 

Calculated Methods

This calculator uses three equations[2] to create the most accurate estimated average. They use weight, height, age, body fat, and sex. The information you’ll need to create your calculator may include:

  • W: Body weight in kg.
  • H: Body height in cm.
  • A: Age.
  • F: Body fat in percentage

In general, you only need your weight, height, and age for an average. 

1. Mifflin-St Jeor Equation

This calculation considers your weight, height, age, activity, and sex assigned at birth. It is determined to be the most accurate[3] for obese adults. It works as follows: 

Males assigned at birth: BMR = 10W + 6.25H – 5A + 5

Here, the equation adds 5 to account for the higher muscle mass typically seen in males. 

Females assigned at birth: BMR = 10W + 6.25H – 5A – 161

For females, 161 is subtracted to reflect the difference in body composition and metabolic rate between sexes.

Next, multiply the BMR by the appropriate activity factor:[4]

  • Sedentary. Little to no exercise, desk job: BMR X 1.2.
  • Light Activity. Exercise 1 to 3 days per week: BMR X 1.375.
  • Moderate Activity. Exercise 3 to 5 days per week: BMR X 1.55.
  • Very Active. Exercise 6 to 7 days per week: BMR X 1.725.
  • Extra Active. Exercise 2x per day: BMR X 1.9.

2. Revised Harris-Benedict Equation

Similar to the Mifflin-St Jeor Equation, the revised Harris-Benedict calculation also requires your sex, weight, height, and age: 

Males assigned at birth: BMR = 13.397W + 4.799H – 5.677A + 88.362

Females assigned at birth: BMR = 9.247W + 3.098H – 4.330A + 447.593

3. Katch-McArdle Formula

This equation might be more appropriate for people with a normal weight[5] who know their body fat percentage: 

BMR = 370 + 21.6 (1 – F)W

Here, F is the body fat percentage as a decimal, i.e., 18% would be 0.18. This formula considers lean body mass, the total weight minus fat mass, to calculate your BMR. 

ZigZag Schedule

Zigzag calorie cycling involves alternating the number of calories consumed on a given day. A person on a zigzag diet would have a combination of high-calorie and low-calorie days to meet the same overall weekly calorie target. For example, three days a week could be 2,300 calories, and four days of 1,775 calories. This would offer an average of 2,000 calories per day.  

It’s generally recommended that the high-calorie and low-calorie days vary by approximately 200-300 calories, but this will be affected by daily activity.

A study on a calorie-shifting diet[6] versus a calorie-restriction diet showed interesting results. Those on the shifting diet had a greater decrease in blood sugar, triacylglycerol, and cholesterol levels. Also, hunger decreased, and satisfaction increased after four weeks of the shifting diet. 

While this diet also showed better adherence levels, the study only had 74 subjects and lasted 4-6 weeks with a 1-month follow-up. Longer and larger studies are needed to confirm the potentially promising results. 

Minimum Caloric Needs

Research suggests that females get at least 1,200 calories,[7] and males get at least 1,500 calories a day unless supervised by doctors. This is the absolute minimum recommended, as any less can endanger your basic bodily functions and overall health, and it’s based on averages.

Your minimal basal metabolic rate may be much higher, affecting the number of calories allowed per day – depending on several individual factors like height, weight, age, activity, or percent body fat.   

In fact, the new Dietary Guidelines for Americans suggest that females aged 31 to 59[8] should consume an average of 1,600 to 2,200 calories. For males, it’s about 2,200 to 3,000 calories a day. 

This is to help you remember that restricting too many calories can be dangerous, regardless of your desire for quick weight loss. It can harm not only your physical but also your mental health. For example, your brain alone consumes 20% of your basic metabolic energy[9] levels – keeping your complex organs working for optimal functioning requires calories. 

Calorie Counting As A Means For Weight Loss

Calorie Counting As A Means For Weight Loss
Counting calories might help you stay within a deficit. Photo: Dragon Images/Shutterstock

In general, you need to consume fewer calories than you burn to lose weight. Counting calories might help you become more aware of what and how much you’re eating, helping you to stay within a deficit. 

However, it’s important not to get too caught up in the exact numbers since the calculators are based on averages. Remember, our bodies are all different, meaning it might take more or less time than you wish to lose weight. Aiming for a consistent deficit should lead to a loss over time. 

Just keep in mind that it’s about more than food, too. Your lifestyle deeply impacts your metabolism, as well as your cravings and food choices. For example, sleep deprivation[10] can lead to cravings for high-calorie foods and less food-related self-control. 

So, if you’ve ever been told to just “eat fewer calories,” remember that it’s not all about calories. Focus on self-care and healthy habits for an overall healthy body and mind. 

The 3,500-Calorie Weight Loss Myth

You might have heard that a deficit of 3,500 calories equals about one pound[11] of weight loss. However, it’s an outdated claim and not entirely accurate. How the human body gains and loses weight is incredibly complex. People tend to lose weight at different rates, even with the same caloric deficit. 

It also doesn’t consider how weight loss involves water and muscle loss, especially in the initial stages of dieting. For example, you might lose weight more quickly at the start of your weight loss journey, but that may be due to water and glycogen depletion – it’s not entirely based on fat loss. So, if you find a fat-loss, weight-loss, or maintenance calorie calculator, know there’s always some wiggle room with the suggestions. 

Plus, your metabolic rate might change as your body adapts to a lower calorie intake. This will, again, affect your rate of weight loss. 

The point to remember is that strictly following your calorie intake may not always give you the results you expect. Your weight loss journey will likely be a roller-coaster of ups and downs – and that’s normal. It’s not a linear or easy process. But, focusing on building healthier habits, in general, can lead you toward long-lasting weight management. 

Why You Can Trust Our Expert-Backed Calorie Calculator?

Our calorie calculator is one of the most reliable options available. It’s grounded in evidence-based methodologies, incorporating the latest findings in nutrition and metabolism. These calculations are the result of years of scientific testing and refinement. 

These calculations also consider many personal factors, such as sex, weight, height, percent body fat, activity, and age. With a team of dietitians and a focus on activity level, this all-in-one calculator is practical for everyday use.

Keep in mind calorie calculators are based on averages. No online calculator can know your specific bodily needs and give you 100% certain results. However, ours can be a reliable tool to give you a general idea of your BMR. 

How Many Calories Should You Eat Per Day?

The new Dietary Guidelines for Americans[8] list the recommendations for daily calories needed. They’re based on the median height and body weight for a healthy body mass index[12] or BMI. Your BMI approximates your body fat based on your height and current weight. 

For adults, the reference male is 5’10 and 154 lbs. The female reference is 5’4 and 126 lbs. As always, take into account that these are averages. Your needs may vary depending on individual factors, like how much exercise you get. 

To calculate calories to lose weight, you want to achieve a calorie deficit of 500-1,000 calories per day[13] from your BMR by reducing calories and increasing activity to lose 1-2 lbs per week. Counting activity calories will help you maintain a calorie deficit without cutting too many calories from your healthy diet. And never go below the minimum calorie amounts for your sex.

Here are the guidelines for recommended daily calorie averages based on age and sex:

People Assigned Female At Birth

Age GroupDaily Calorie Requirements
2 – 41,000 – 1,400
5 – 81,200 – 1,800
9 – 131,400 – 2,200
14 – 181,800 – 2,400
19 – 301,800 – 2,400
31 – 591,600 – 2,200
60+1,600 – 2,200

People Assigned Male At Birth

Age GroupDaily Calorie Requirements
2 – 41,000 – 1, 600
5 – 81,200 – 2,000
9 – 131,600 – 2,600
14 – 182,000 – 3,200
19 – 302,400 – 3,000
31 – 592,200 – 3,000
60+2,000 – 2,600

Calorie-Counting As A Weight Loss Strategy

Here are some ways calorie counting can be used as a tool for developing healthier eating habits:

Increased Intake Awareness

By observing what you’re eating, you gain insights into not just the food you consume but your habits, too. For example, you might notice you tend to snack mindlessly in the evening when you don’t eat dessert. By taking the time to track, you can identify areas for improvement. 

May Promote Mindful Eating

With the increased awareness, you might become more mindful of what and how you’re currently eating. If you know you only want to indulge in a lavish dessert just once during the week, for example, you might want to slow down and appreciate every bite.

Food Education And Conscious Choices

By counting calories, you can get a general idea of what healthy portion sizes and nutritional values look like. Knowing the nutritional values of food might also make you more conscious about your choices. Often, choosing healthier options may be lower in calories, encouraging you to try nutritious, low-calorie foods

Encourages Cooking

You may feel the push to cook more to avoid unhealthy foods. Luckily, the internet is full of healthy options to old calorie-rich favorites. 

For example, you can make ice cream from whipped frozen bananas and cacao powder. Plus, muffins or brownies without flour and blended dates instead of sugar; the options are endless. 

Attention On Hunger And Full Cues

If you’re working to reduce your intake, you might be paying more attention to when you’re naturally full  – rather than stopping when the plate is empty. 

Of course, this can go both ways. It’s important not to ignore your body and to nourish yourself fully. If you often find yourself hungry, you may be overly restricting your food intake. It’s best to start slow and take it easy for sustainable weight loss. 

Flexible Food Intake

If you’re primarily focusing on calories, you don’t necessarily have to feel overly restricted about what you eat. The goal is a general deficit, but that doesn’t mean that you can’t still enjoy your favorite pizza now and then. Not every day has to be a deficit; you can focus on weekly goals to make it easier on yourself. 

Tips To Reduce Calorie Intake

Tips To Reduce Calorie Intake
Tips To Reduce Calorie Intake. Photo: tomertu/Shutterstock

If you’re looking to cut back on calories without feeling restricted, slowly try adopting each of these tips:

  1. Eat More Fiber. To feel fuller more quickly,[14] add more fiber to your meals and snacks. This will naturally help you reduce your overall calorie intake[15] while increasing your satiety.
  2. Choose Whole Foods. Whole foods, such as veggies, fruit, and legumes, are often more nutritious and less calorie-dense than processed foods. 
  3. Add Protein. Like fiber, a high-protein diet fills you up[16] and keeps you fuller for longer. Make sure you get a portion of protein at each meal to satisfy hunger cravings. 
  4. Use Smaller Plates. You might’ve heard the phrase, “The eyes are bigger than the stomach.” We’re wired to want to eat when we see food,[17] so how much you serve yourself matters. We’ve also been socially conditioned to finish what’s on our plates instead of focusing on our internal full cues. 
  5. Drink Enough Water. Studies show that increased hydration[18] is associated with a healthy weight and weight loss. It can help your fluid regulation hormones stay balanced, which may suppress your appetite. Drinking before meals[19] might also help you feel fuller, preventing overeating. 
  6. Limit Liquid Calories And Sugar. It’s well known that added sugars[20] are a key contributor to weight gain and obesity. Try switching it up with sparkling waters with fruit for added flavor to reduce your sugar intake. 
  7. Cook At Home. When you cook at home, you know exactly which ingredients are in your meal. At restaurants, it’s another story. You can better manage your portion sizes and calories at home.
  8. Plan Ahead. We all struggle with work-life balance and finding the time to cook. But with some planning, we can make meals ahead of time and freeze portions. Try taking one or two days a week to make larger, low-calorie meals you can save and eat later. 
  9. Eat Mindfully. Mindful eating helps you become more conscious of your eating habits. By eating without distractions, for example, you may notice you’re full and eat less. As more research develops on it, evidence builds that mindful eating[21] can help to change eating behaviors and make losing weight easier. 

There are plenty of ways to slowly begin adopting healthier habits, including adding supplements if you’re deficient in any minerals or vitamins. There’s no need to turn to even the best fat burners, like nighttime fat burners – they may only offer short-term results and don’t change healthy eating habits. 

Potential Risks Of Tracking Calories

While tracking calories is famously seen as the first step toward healthy weight loss, it’s not necessarily the right step for you. Counting calories doesn’t work for everyone, and here’s why:

  • Overly Restrictive Lifestyle. Counting calories might lead some people to go overboard, disrupting parts of their lives to achieve a calorie goal. For example, saying no to social gatherings or losing the ability to enjoy unhealthy food now and then. 
  • Negative Mental Health Effects. How we eat greatly impacts our mood.[22] As well, restricting ourselves too much can lead to stress. Pay attention to how tracking calories affects your mental health and lifestyle. 
  • Ignoring Hunger Cues. Listening to our bodies is an important part of weight management. If you rely solely on calorie allowances, you might not be giving your body the nourishment it needs. If you’re finding yourself hungry, you might be overly restricting yourself – pay attention to what your body is telling you. Consider speaking with a nutritionist if you’re unsure of how to eat well for your body and mind.
  • Nutritional Deficiencies. Focusing on calories alone might lead you to not pay attention to food quality. For some, it’s all about calories, and with restriction, vitamins and minerals might be sacrificed.

Risk Of Eating Disorders

It’s important to note the association between calorie tracking and eating disorders. Focusing too intently on calorie counting can lead to an unhealthy obsession with food and eating habits. You may lose focus on health and develop disordered eating patterns, such as extreme calorie control or restriction. 

For example, calorie tracking has been associated with eating disorder pathology. In one study, 75% of those who already had an eating disorder used a calorie intake counter.[23] About the same amount also claimed that doing so contributed to their eating disorder. 

Calories In Common Foods

Here’s an example of the calorie content of some common foods:[24]

Fruits And Vegetables

  • Apple,[25] one large: 130 calories.
  • Banana, one medium: 110 calories.
  • Tangerine, one medium: 50 calories.
  • Carrots,[26] one 7” long: 30 calories.
  • Bell pepper, one medium: 25 calories.
  • Mushrooms, 3 oz: 20 calories.

Proteins

  • Egg, one large: 75 calories.
  • Baked beans, 1 cup cooked: 254 calories.
  • Tofu, 81 grams: 73 calories.
  • Cod,[27] 3 oz: 90 calories.
  • Chicken breast, 3 oz cooked: 163 calories.

Grains

  • Brown rice, 1 cup cooked: 216 calories.
  • Bread, one slice, whole wheat: 69 calories.
  • Pasta, 1 cup, cooked: 200 calories

Snacks, Sweets, And Drinks

  • Potato chips, 1 oz: 152 calories.
  • Ice cream, one-half cup vanilla: 133 calories.
  • Beer, 12 oz: 146 calories.
  • Wine, 3.5 oz, dry: 130 calories.

Conclusion

Understanding your daily caloric needs might seem overwhelming, but using a calculator can help you learn your recommended amount. Remember that calorie counters and recommendations are based on averages, and individual needs vary. 

It’s also not all about calories eaten or burned; your stress levels and sleep affect your weight, too. So, while counting calories might help you understand how much you’re eating, don’t forget to take the whole picture into account. A healthy diet requires a holistic approach for long-term management.

Frequently Asked Questions

What is a good calorie intake per day?

The average adult female 31-59 years of age may need 1,800 to 2,400 and males 2,200 to 3,000 daily. However, everyone’s daily caloric needs vary. It depends on your sex, height, age, weight, and activity levels. 

Are 1,200 calories a day enough?

Not necessarily; 1,200 calories daily is insufficient for most adults. It does not provide enough nutrients or energy for optimal health. Health professionals consider this the lowest calorie level for weight loss for most women.

Will I lose weight on 1500 calories a day?

It all depends on individual factors, such as sex, height, age, weight, activity, and percent body fat levels.  This is the lowest calorie level for weight loss for most men, but it is best to calculate it.

How many calories should you eat for breakfast?

As always, calorie recommendations should be applied to your specific individual factors. For many, breakfast is about 20-25% of your daily calories, which could be 400-500 calories for a 2,000-calorie diet. 

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EHproject has strict sourcing guidelines and relies on peer-reviewed studies, academic research institutions, and medical associations. We work mostly with peer-reviewed studies to ensure accurate information. We avoid using tertiary references. You can learn more about how we ensure our content is accurate and current by reading our editorial policy.

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