How Many Calories Do YOU Actually Need?
Most calorie advice online is one-size-fits-all. But your body isn’t. Your Total Daily Energy Expenditure — or TDEE — is the exact number of calories your body burns each day based on who you are and how you live.
Get yours in seconds with the calculator below. Then scroll down for a full guide on what your number means, why most people get it wrong, and how to use it to actually see results.
TDEE Calculator
Calculated using the Mifflin-St Jeor equation — one of the most validated TDEE formulas in research. Your true TDEE can only be confirmed by tracking calories vs. weight change over 2–3 weeks. Use this as your starting point, then adjust by ±100–200 kcal based on real results.
What Is TDEE?
TDEE stands for Total Daily Energy Expenditure. It’s the total number of calories your body burns in a 24-hour period — not just during exercise, but for everything: breathing, digesting food, walking to your car, thinking, sleeping.
Knowing your TDEE is the single most important starting point for any nutrition goal, whether you want to lose fat, maintain your current weight, or build lean muscle.
TDEE vs BMR — What’s the Difference?
You’ll notice our calculator shows two numbers: BMR and TDEE. Here’s what they mean:
BMR (Basal Metabolic Rate) is the calories your body burns just to stay alive — organs functioning, blood pumping, body temperature maintained. Think of it as the absolute minimum your body needs if you did nothing but lie still all day.
TDEE takes your BMR and multiplies it by your activity level. It’s the realistic number that accounts for your actual life — your workouts, your job, your daily movement.
Always use your TDEE as your calorie target, not your BMR.
Why Do Different TDEE Calculators Give Different Results?
This is one of the most common frustrations — and it’s valid. You might enter the same stats into three different calculators and get results ranging 300–500 calories apart.
Here’s why:
Different formulas. The two most widely used are Mifflin-St Jeor (what we use) and Harris-Benedict. Mifflin-St Jeor has been shown in research to be the more accurate of the two for most people.
Activity multipliers vary. Different sites define “moderately active” differently. One site’s “moderate” might be another’s “light.”
They’re all estimates. No calculator can measure your actual metabolism. Every TDEE calculator gives you a starting estimate — the only way to find your true TDEE is to track your food intake and weight changes over 2–3 weeks and adjust from there.
Our calculator uses the Mifflin-St Jeor equation and clear activity level descriptions to give you the most reliable starting point possible.
How to Use Your TDEE Result
Once you have your number, here’s what to do with it:
To lose weight: Eat 300–500 calories below your TDEE per day. A 500 calorie daily deficit creates roughly 0.5 kg (1 lb) of fat loss per week. Don’t go lower than 1,200 calories (women) or 1,500 calories (men) without medical supervision.
To maintain weight: Eat at your TDEE. Simple. If your weight creeps up or down over a few weeks, adjust by 100–200 calories.
To build lean muscle: Eat 200–300 calories above your TDEE. More than that tends to add excess fat rather than muscle, especially if you’re not a beginner.
What About Macros?
Calories are the foundation, but macros — protein, carbs, and fat — determine your body composition and how you feel day to day.
Our calculator gives you a suggested macro split alongside your calorie target. Here’s why each one matters:
Protein is the most important macro for body composition. It preserves muscle while you’re in a deficit, supports muscle growth in a surplus, and keeps you fuller for longer. We recommend roughly 1g per pound of bodyweight (2.2g per kg) as a daily target.
Carbohydrates are your body’s preferred fuel source, especially for exercise. Contrary to popular belief, carbs are not the enemy — undereating them tanks your energy and workout performance.
Fat supports hormone production, skin health, and absorption of fat-soluble vitamins (A, D, E, K). Don’t drop fat too low — for women especially, adequate dietary fat is essential for hormonal balance.
How Accurate Is This Calculator?
Honest answer: it’s an estimate, not a measurement.
The Mifflin-St Jeor formula is the most validated equation for predicting resting metabolic rate in research settings, but individual metabolism varies. Factors like stress, sleep quality, gut health, and hormonal status all affect how many calories your body actually uses — and no calculator can account for all of them.
The right approach: use this number as your week-one starting point. Weigh yourself at the same time each morning, track your average over a week, and see how your weight responds. If it’s not moving in the direction you expect after 2–3 weeks, adjust your intake by 100–200 calories and repeat.
Does TDEE Change Over Time?
Yes — and this catches a lot of people off guard.
As you lose weight, your TDEE decreases because a lighter body burns fewer calories. This is why weight loss tends to slow down after the first few weeks. Recalculate your TDEE every 4–6 weeks, or any time your weight changes by more than 5 lbs (2–3 kg).
Your TDEE also changes if your activity level changes — starting a new workout routine, switching from an active job to a desk job, or recovering from an injury all affect your daily burn.
Frequently Asked Questions
Is TDEE the same every day?
No. It varies based on how active you are on a given day. The number from this calculator is your average daily estimate. Some days you’ll burn more, some less — that’s normal.
Should I eat back calories burned during exercise?
No — your TDEE already includes your exercise through the activity multiplier you selected. Eating back workout calories on top of your TDEE would put you at maintenance or above.
Can women use the same TDEE calculator as men?
Yes — sex is factored into the formula. The Mifflin-St Jeor equation has a different constant for women (−161 vs +5 for men) which accounts for the average difference in lean body mass and metabolic rate.
My TDEE seems too high / too low. What should I do?
Double-check your inputs, especially your activity level — most people underestimate how sedentary they actually are. If you sit at a desk most of the day and exercise 3x per week, “lightly active” is usually more accurate than “moderately active.” When in doubt, choose the lower activity level and adjust up if needed.
What’s a healthy rate of weight loss?
Most guidelines recommend 0.5–1 kg (1–2 lbs) per week as a sustainable, healthy rate. Faster loss often means muscle loss alongside fat, which works against you long-term.
This calculator is for informational purposes only and does not constitute medical or nutritional advice. If you have a health condition or are considering significant dietary changes, please consult a qualified healthcare professional.