This free TDEE calculator tells you exactly how many calories your body burns each day — and precisely how many to eat to lose weight, maintain your current weight, or build muscle. Enter your age, gender, height, weight, and activity level, and the calorie TDEE calculator instantly shows your Total Daily Energy Expenditure, your Basal Metabolic Rate, and personalised calorie targets for each goal. This is the single most useful number for anyone serious about managing their weight or improving their body composition.

Rather than following a generic calorie target, this TDEE calculator online gives you a number built specifically around your body and lifestyle. Use it as your evidence-based starting point, then refine based on real-world results over two to three weeks.

What Is TDEE — Total Daily Energy Expenditure?

TDEE meaning: Total Daily Energy Expenditure is the total number of calories your body burns in a 24-hour period — including your resting metabolism, all physical activity, and the energy used to digest food. It is the complete picture of your daily caloric expenditure, not just what you burn during exercise.

Understanding your TDEE total daily energy expenditure transforms weight management from guesswork into a precise, controllable process. Eat consistently below your TDEE and you lose weight; eat above it and you gain. According to the National Heart, Lung, and Blood Institute, energy balance — calories consumed versus calories burned — is the fundamental driver of weight change. The TDEE calculator makes that balance visible and manageable for everyone.

The TDEE Calculation Formula — Mifflin-St Jeor

This total daily energy expenditure TDEE calculator uses the Mifflin-St Jeor equation, the formula most widely recommended by nutrition professionals as the most accurate for estimating BMR in the general population. The original Mifflin-St Jeor research established this as the gold standard for TDEE calculation formula estimates across diverse body types and ages.

The TDEE calculation formula works in two stages. First it calculates your BMR using weight, height, age, and biological sex. Then it applies an activity multiplier to calculate TDEE from BMR:

• Calculate TDEE formula (male): BMR = (10 × kg) + (6.25 × cm) − (5 × age) + 5
• Calculate TDEE formula (female): BMR = (10 × kg) + (6.25 × cm) − (5 × age) − 161
• TDEE = BMR × Activity Multiplier

The activity multiplier ranges from 1.2 (sedentary) to 1.9 (extra active). This TDEE cal result is what the calculator displays as your maintenance calories.

BMR vs TDEE — Calculate BMR and TDEE Together

Your BMR (Basal Metabolic Rate) is the number of calories your body burns at complete rest — the energy required just to keep your heart, lungs, and organs functioning. It is the foundation of the calorie calculation. The bmr calculator TDEE step multiplies this by your activity level to produce your full daily caloric expenditure.

The gap between BMR and TDEE grows with activity: a sedentary person’s TDEE might be only 20% above BMR, while an elite athlete’s could be nearly double. This is why exercise enables you to eat significantly more while maintaining the same weight — it raises the multiplier and therefore the total daily energy expenditure figure that determines your energy balance. Calculate TDEE from BMR by selecting your honest activity level — the result is your personalised daily calorie target.

TDEE Activity Level Chart — Choosing Your Multiplier

The activity level you select is the single variable that most dramatically affects your TDEE result. This TDEE activity level chart shows the standard multipliers used by this calculator:

• Sedentary (×1.2) — desk job, little or no structured exercise.
• Lightly active (×1.375) — light walking or exercise 1–3 days per week.
• Moderately active (×1.55) — moderate workouts 3–5 days per week.
• Very active (×1.725) — hard training 6–7 days per week.
• Extra active (×1.9) — intense daily training or a physically demanding job.

Most people overestimate their activity level. If uncertain, choose the lower option — you can always adjust upward if you find you are losing weight faster than intended. The daily energy expenditure estimate is most accurate when activity level is selected honestly.

TDEE Calculator to Lose Weight — Setting a Calorie Deficit

Using the TDEE calculator to lose weight is straightforward: eat consistently below your TDEE. The TDEE calculator calorie deficit shown in the results uses a 500-calorie daily deficit, which produces approximately 0.45 kg (1 lb) of fat loss per week — the rate widely recommended by health authorities as both safe and sustainable.

Larger deficits are tempting but counterproductive over time: they accelerate muscle loss, suppress metabolism, and are difficult to sustain beyond a few weeks. Mayo Clinic’s calorie and weight loss guidance consistently recommends a moderate deficit paired with adequate protein and resistance training as the most effective long-term strategy. Estimate TDEE honestly, set a moderate deficit, and adjust every few weeks as your weight changes.

TDEE for Muscle Gain and Macro Targets

For the TDEE calculator for muscle gain use case, the principle reverses: eat above your TDEE in a modest surplus of 200–300 calories, combined with consistent resistance training. A smaller surplus minimises fat gain while still providing the energy needed for muscle protein synthesis. The 500-calorie gain target shown in the results is a conservative upper bound — most natural lifters do better with a smaller surplus to stay lean while building.

This tool also pairs naturally with a macro calculator TDEE approach: once you know your daily calorie target, set protein at 1.6–2.2g per kg of bodyweight, then divide remaining calories between fats and carbohydrates based on preference. The TDEE macro calculator function is the first and most important step — you cannot set effective macros without first knowing your total calorie goal. For body composition tracking alongside calorie management, our BMI calculator provides a useful parallel health metric. Explore the full free tools hub for related health and fitness calculators.

Frequently Asked Questions