Scientific & Accurate

Calorie Calculator

Calculate your exact daily caloric needs for weight loss, muscle gain, or maintenance.

A calorie is a unit of energy your body uses to fuel every biological function — breathing, circulation, movement, and digestion. Your Total Daily Energy Expenditure (TDEE) is the total calories you burn in a day. This calculator estimates it with the Mifflin-St Jeor equation, which research rates as the most accurate predictive formula for healthy adults. Eat below your TDEE to lose fat; eat above it, paired with resistance training, to build muscle. Daily energy needs scale with activity level, per NIH/NIDDK guidance.

Supports Imperial (lbs/ft) & Metric (kg/cm) • 3 Proven Formulas

Your Stats

Scientifically Proven

Uses industry standard formulas like Mifflin-St Jeor for maximum accuracy.

Goal Oriented

Customized calculations for weight loss, muscle gain, or maintenance.

Activity Adjusted

Factors in your daily activity level for precise energy expenditure.

How We Calculate Your Calories

We use three of the most scientifically validated formulas to estimate your Basal Metabolic Rate (BMR). Here is the exact math behind our calculator:

1. Mifflin-St Jeor Equation (Recommended)

Considered the most accurate formula for the general population.

For Men:
BMR = (10 × weight) + (6.25 × height) - (5 × age) + 5

For Women:
BMR = (10 × weight) + (6.25 × height) - (5 × age) - 161

2. Revised Harris-Benedict Equation

The original formula from 1919, revised in 1984.

For Men:
BMR = 88.362 + (13.397 × weight) + (4.799 × height) - (5.677 × age)

For Women:
BMR = 447.593 + (9.247 × weight) + (3.098 × height) - (4.330 × age)

3. Katch-McArdle Formula

Most accurate if you know your body fat percentage.

Formula:
BMR = 370 + (21.6 × Lean Body Mass)
Where Lean Body Mass = Weight × (1 - Body Fat %)

Key: W = Weight in kg, H = Height in cm, A = Age in years, F = Body Fat %

Common Food Calorie Chart

Average calorie counts for common foods (per 100g / 3.5oz):

Food Item	Category	Calories (kcal)	Protein (g)
Chicken Breast (Raw)	Protein	165	31g
Salmon (Raw)	Protein	208	20g
Egg (Large, 1 unit)	Protein	78	6g
Rice (White, Cooked)	Carbs	130	2.7g
Oats (Rolled, Raw)	Carbs	389	16.9g
Avocado	Fat	160	2g
Almonds	Fat	579	21g
Broccoli	Veg	34	2.8g
Banana	Fruit	89	1.1g font-medium
Apple	Fruit	52	0.3g

The Ultimate Guide to Calorie Counting

Understanding your caloric needs is the single most important factor in changing your body composition. Whether you want to shed body fat, build lean muscle, or simply maintain your health, the laws of thermodynamics always apply: Energy Balance.

Basal Metabolic Rate (BMR)

Your BMR is the number of calories your body burns at complete rest. Even when sleeping, your body needs energy for breathing, blood circulation, and cell repair. This accounts for about 60-70% of your total daily energy burn.

Total Daily Energy Expenditure (TDEE)

TDEE combines your BMR with the calories burned through physical activity and the thermic effect of food. This is the total number of calories you need to consume daily to maintain your current weight.

Activity Level Multipliers (Physical Activity Level - PAL)

Your TDEE is calculated by multiplying your BMR by an activity factor (PAL value). Choosing the right activity level is crucial for an accurate calculation:

Activity Level	Multiplier	Description / Exercise Frequency
Sedentary	1.2	Little to no exercise, desk job, minimal daily movement.
Lightly Active	1.375	Light exercise or sports 1–3 days per week. Light walking or standing jobs.
Moderately Active	1.55	Moderate exercise or sports 3–5 days per week. Active daily routine.
Very Active	1.725	Hard exercise or intense sports 6–7 days per week. High physical demand.
Extra Active	1.9	Very hard daily exercise, athletic training, or a highly physical job (e.g., construction).

Macronutrients: The Quality of Your Calories

While calories determine weight change, macronutrients determine body composition change. Here's a quick breakdown:

Protein (4 kcal/g)

Essential for muscle repair and growth. High satiety helps control hunger. Aim for 1.6-2.2g per kg of body weight.

Carbohydrates (4 kcal/g)

The body's primary fuel source. Important for high-intensity training and brain function.

Fats (9 kcal/g)

Crucial for hormone production and nutrient absorption. Never eliminate fats completely.

Common Calorie Counting Mistakes

Underestimating Intake: Most people underestimate their food intake by 20-30%. Use a food scale for accuracy.
Overestimating Exercise: Fitness trackers often overestimate calories burned. Be conservative with your activity level estimation.
Ignoring Liquid Calories: Sodas, juices, and fancy coffees can add hundreds of invisible calories.
Inconsistency: Eating perfectly for 5 days and bingeing on weekends can undo your calorie deficit.

Frequently Asked Questions

How fast should I lose weight?

A safe and sustainable rate of weight loss is 0.5% to 1% of your body weight per week. For most people, this is about 0.5kg to 1kg (1-2 lbs) per week. Losing weight faster often leads to muscle loss and metabolic adaptation.

What is the difference between BMR and TDEE?

Basal Metabolic Rate (BMR) is the amount of energy your body requires to function at complete rest (keeping your heart beating, lungs breathing, and organs running). Total Daily Energy Expenditure (TDEE) is the total number of calories you burn per day, including BMR, physical activity, and the thermic effect of food.

How accurate are Mifflin-St Jeor and Harris-Benedict formulas?

For most individuals, the Mifflin-St Jeor formula estimates resting energy expenditure within 10% of the actual value. The Katch-McArdle formula can be even more accurate for individuals with higher muscle mass or lower body fat, as it relies on Lean Body Mass.

Do I need to count calories forever?

No! Calorie counting is a tool to teach you portion control and energy density. Once you have a good understanding of how much food you need, you can transition to intuitive eating.

What if I hit a plateau?

Plateaus are normal. As you lose weight, your BMR decreases (because you are smaller). You may need to recalculate your calories after every 5-10lbs lost. Also, ensure you aren't unconsciously moving less (NEAT) or eating more.

Ready to Start Your Journey?

Now that you know your numbers, let our AI generate a personalized meal plan that fits your exact caloric needs.

BMR vs. TDEE: What’s the Difference?

Your Basal Metabolic Rate (BMR) is the number of calories your body burns at complete rest just to keep you alive — breathing, circulating blood, and maintaining temperature. Your Total Daily Energy Expenditure (TDEE) takes that baseline and adds the calories you burn through movement, exercise, and digesting food. TDEE is the number that actually matters for weight goals, because it reflects how much you burn on a normal day. To lose weight you eat below it; to gain, you eat above it.

How Many Calories Should I Cut to Lose Weight?

A deficit of roughly 500 calories per day is the most widely recommended starting point, since it targets about one pound of fat loss per week while still leaving enough energy to train and recover. Aggressive cuts can work short-term but often backfire through muscle loss, low energy, and rebound eating. The sustainable approach is a moderate deficit paired with enough protein — which you can dial in using our protein calculator and macro calculator.

Why Your Activity Level Matters

The activity multiplier is the single biggest variable in your TDEE, and it’s where most people over- or under-estimate. A desk job with no exercise is genuinely sedentary; training hard four or five times a week pushes you into the active range. Choosing the honest option keeps your calorie target realistic, so recalculate whenever your routine changes for more than a couple of weeks.