Calorie Calculator

To figure out how many calories you should eat per day, the first important step is to figure out how many calories you’re currently burning per day. The calorie calculator below will give you a good baseline of calories burned per day by a typical person of your height, weight and activity level that you can then use to make changes to allow you to increase or decrease the calories you consume based on your goal of gaining or losing weight.

Fill out the details in the calorie calculator below based on your current stats and activity level.  If you’re not sure which Activity Level best describes you, check the section entitled ‘Which Activity Level Should I Choose?’ below. This calorie calculator is also the perfect tool to figure out how many calories you’d need to eat to reach your goal weight depending on how quickly you’d want to reach that target weight.

HOW DOES THE CALORIE CALCULATOR WORK?

The calorie estimate you got above isn’t just random guesswork. It’s based on a scientific formula called the Mifflin-St. Jeor equation.

This is considered one of the most accurate formulas out there for determining your daily calorie intake.

Let’s break down how it works in simple terms:

STEP ONE: BASAL METABOLIC RATE

The calculator takes the current weight, height, age, and activity level of an individual person and crunches the numbers to estimate your Basal Metabolic Rate (BMR).

Basically, this is the number of calories your body burns at rest just to stay alive (think breathing, heart beating, and brain functioning).

STEP TWO: PHYSICAL ACTIVITY

Then, it factors in your physical activity based on levels of exercise, whether you’re crushing it in the gym or just going about your everyday activities with light activity.

It does this by using an activity multiplier.

If you’re not sure which activity level is right for you based on your own exercise regimens, we answer that below.

STEP THREE: PLUG IT INTO THE FORMULA

Here’s the formula in action. Simply plug in the variables into the equation and you are left with your suggested daily calorie intake.

Give it a try for yourself!

MIFFLIN-ST. JEOR EQUATION

For men: 66 + (6.23 × weight in lbs) + (12.7 × height in inches) – (6.8 × age)

For women: 655 + (4.35 × weight in lbs) + (4.7 × height in inches) – (4.7 × age)

Activity Factor Level: This adjusts for how much you move:

• Sedentary (little to no exercise): BMR × 1.2
• Lightly active (light exercise/sports 1–3 days per week): BMR × 1.375
• Moderately active (moderate exercise 3–5 days per week): BMR × 1.55
• Very active (hard exercise 6–7 days per week): BMR × 1.725
• Super active (intense daily training or physical job): BMR × 1.9

What you get is your daily target calorie intake: the number of calories you need to maintain your weight.

From there, you can tweak it based on your goal for a healthy weight range.

WHICH ACTIVITY LEVEL SHOULD I CHOOSE?

When choosing your activity level, honesty isn’t optional, it’s essential.

The calorie calculator isn’t a magic wand; it’s a tool. And tools work best when you give them the right data.

Your daily calories are calculated based on your non-exercise activities (walking, cleaning, standing) and intentional workouts.

If you’re not realistic, you’ll either under-fuel your body, leading to fatigue and excessive weight loss, or overestimate, causing excess calories to creep in.

Here’s the breakdown on how to choose your activity level:

Sedentary: Minimal movement beyond sitting. Perfect for those whose daily activities don’t involve purposeful exercise or go beyond work desks and couches.

Lightly Active: Some movement through the day or light exercise a few times per week.

Moderately Active: You work out several days per week (such as brisk walking) and stay on your feet with moderate effort.

Very Active: Think intense workouts or a physically demanding job. Your elevated heart rate activity burns serious calories per week.

Super Active: Athletes or those training daily with high energy output in intense exercise.

Your activity multiplier adjusts your ideal calorie intake to fuel your body weight goals, whether that’s healthy weight loss, muscle growth, or the pace of weight gain needed to bulk up.

Too low, and you’ll plateau in weight loss. Too high, and you’ll face the disadvantages of calorie surplus.

HOW MANY CALORIES SHOULD I EAT PER DAY FOR WEIGHT LOSS?

Unfortunately, there’s no one-size-fits-all answer to this. How many calories you need depends on your body weight, activity level, and goal for sustainable weight loss.

But here’s a proven formula: aim for a calorie deficit (calorie reduction) of about 200–500 calories per day.

Over a period of time, that adds up to one or two pounds per week, which is considered healthy weight loss.

Start by using a calorie calculator to estimate your daily calories based on your body height, weight, and activity level, including both non-exercise activities and workouts with elevated heart rate activity.

Once you’ve got your number, here’s where the real work begins. This isn’t just about numbers.

It’s about understanding your calorie environment and making informed decisions about your food, nutrition, and activities.

Once you reach your goal weight, you can slowly increase your calorie intake to achieve long-term weight maintenance.

HOW DO I CALCULATE THE CALORIES NEEDED FOR MUSCLE GAIN?

If you want to pack on muscle, you’ve got to eat more, but not just anything.

The key to successful muscle gain is calculating your actual calorie needs, balancing your calorie breakdown, and fueling your body with the right mix of nutrient-dense foods.  This will include animal foods and other sources of protein, as well as other natural foods such as whole grains and starches, vegetables, fruits and healthy fats.

First, calculate your maintenance calories using the calorie calculator above. This gives you the estimate of calories your body needs to maintain its current weight.

From there, add a surplus of 200 to 500 calories per day depending on your goal weight.

For example, if your maintenance is 2,000 calories, try to eat between 2,200 and 2,500 calories to encourage muscle growth while minimizing fat gain.

CALORIES BURNED FROM COMMON EXERCISES

Whether you’re looking to add muscle mass or lose weight, you’ll want to take into account how many calories you’re burning through your regular exercise activity as well.

Take a look at the table below to determine how to adjust your eating habits according to how many calories you are burning through exercise on any given day.

TIPS TO HELP WITH GETTING YOUR DAILY CALORIES

Hitting your daily calorie target isn’t just about eating more or less, it’s about eating smarter.

Whether your goal is weight loss, muscle gain, or finding that perfect weight, these tips will help you maximize the advantages of calorie-focused nutrition while avoiding common mistakes.

CHOOSE QUALITY CALORIES

Not all calories are created equal, and the nature of calories you consume matters. Focus on nutritious ingredients like lean proteins, whole grains, and healthful foods packed with nutrients, while cutting back on refined grains and overly processed food products.

Read the Food Label: It’s your go-to source for checking the calorie content and identifying high-quality recipe ingredients.

Pay Attention to Food Proportions: Use your plate wisely: balance macronutrients of protein, carbs, and healthy fats. To get a grasp on food proportions, check out the plate visual below.

Avoidance of Foods: Steer clear of high-calorie foods like sugary snacks or empty-calorie drinks.

TRACK AND ADJUST

Consistency is key. Use tools like apps or even a custom nutrition label system to stay on top of your portion of calorie intake.

Whether you’re logging your meals or analyzing your caloric measurements, tracking is the backbone of success.

Measurement of Portions: Be precise. Use kitchen scales or measuring cups for an objective measurement of your portions.

Ingredient Swaps: Upgrade your meals with reduced-fat foods, whole carb sources, or even protein-packed snacks like protein bars.

Alcohol Calories: Cut them out. Those alcohol beverages supply calories without adding value to your goals.

WATCH FOR PITFALLS

The wrong approaches to weight loss can backfire, leading to excessive weight loss, muscle loss, or a plateau in weight loss.

Instead, aim for an effective pace of weight loss.  Shooting for around one or two pounds per week can create real change over longer periods of time.

Stick to the Plan: Follow your routine for a couple of weeks before making any major changes.

Adjust for Progress: If your results slow, reevaluate your calorie difference and tweak your intake.

Avoid Over-Restriction: Yes, low-calorie foods can help, but cutting calories too much isn’t sustainable and can derail your progress over time.

WHAT ARE THE DISADVANTAGES OF CALORIE COUNTING?

Calorie counting can be a powerful tool, but it’s not without its downsides.

First, it can turn into an obsession, causing people to overlook the importance of health foods and the ideas of nutrition beyond just numbers.

Focusing solely on tracking calories can lead to poor food choices—like choosing junk (like sugary foods) or as your favorite energy source just because it fits your daily target calorie intake.

Another issue? It’s easy to forget that calorie estimates need to be taken with a grain of salt.

The numbers on labels or apps aren’t perfect, and the actual caloric intake you consume may vary.

Over time, relying too heavily on calorie counting instead of effective weight loss methods like portion control and meal balance can backfire.

Finally, calorie counting is not always practical for nutrition for people who prefer flexibility.

A strict calorie focus might discourage editing ingredients or experimenting with meals.  After all, the sources of calories and types of foods you’re eating is the most important element.

Instead, aim for a sustainable plan: one or two pounds of weight loss or gain per week can be achieved by making smart food choices per week without obsessing over every number.

SHOULD YOU COUNT YOUR CALORIES?

Short answer? Yes, but only for a couple of weeks.

If you’re just starting out with muscle building or fat loss, tracking calories can give you a solid foundation on the type of calories you’re eating.

It helps you understand your food choices, portion sizes, and how to hit your goals consistently.

But here’s the thing: making this a long-term choice per week can be overwhelming and unnecessary.

Once you’ve got a good grasp of what works (balancing health foods, hitting your protein goals, and managing portions), you can ditch the calculator.

Calorie counting? It’s a great tool, but it’s not the end game. Use it to learn, then move on to smarter, more sustainable approaches.

Focus instead on building habits that stick, like choosing nutrient-dense meals and adjusting portions based on your progress.

Don’t have a fully fleshed out nutrition and fitness program that can help you achieve the weight loss or weight gain you’re after? We can help! Check out our ATHLEAN-X programs to see which is the best fit for your goals and fitness level.