The TDEE Calculator — your complete Total Daily Energy Expenditure tool — is one of the most accurate and essential resources for fitness, body recomposition, and long-term health. Whether you’re a student balancing studies and training, a professional chasing sustainable fat loss, an athlete optimizing performance, or anyone worldwide who wants data-driven control over their nutrition, this free calculator delivers precise calorie and macro targets in seconds.
Our completely free, no-registration-required TDEE calculator and macro tool uses the industry-standard Mifflin-St Jeor formula to calculate your Basal Metabolic Rate (BMR) and then applies the correct activity multiplier to reveal your true daily calorie burn. Enter your details once and instantly receive personalized maintenance calories, deficit targets for fat loss, surplus targets for muscle gain, plus a smart macro split — all with real-time updates and zero ads. The tool is fully mobile-friendly, works offline after first load (progressive web app style), automatically saves your history (with your functional cookie consent), and is perfect for daily tracking anywhere in the world. Jump right in and try it now on our TDEE Calculator page.
How to Calculate Your Total Daily Energy Expenditure
Inputting your body parameters: age, weight, and height
Enter your age in years, current weight (kg or lbs), and height (cm or feet/inches). These three inputs are the core of the Mifflin-St Jeor equation. The calculator instantly handles unit conversion so you can switch between metric and imperial without losing accuracy — ideal for users anywhere who prefer their local measurement system.
Pro tip: Use measurements taken first thing in the morning, after using the bathroom, for the highest precision.
Choosing the right activity level for accurate results
Select your typical weekly activity. The tool multiplies your BMR by the correct factor to produce your real-world TDEE. Choosing honestly prevents under- or over-estimating calories and keeps your progress on track.
- Sedentary – desk job, little to no exercise
- Lightly active – light exercise or walking 1–3 days/week
- Moderately active – moderate exercise or sports 3–5 days/week
- Very active – hard training 6–7 days/week
- Extra active (athlete) – intense daily training or physical job
Understanding the male vs. female metabolic calculation
The Mifflin-St Jeor formula applies different constants for men and women because of natural differences in muscle mass and hormonal profiles. This single choice can shift your BMR by 100–200 calories per day, making gender selection critical for correct results.
Sedentary (1.2×) vs. athlete (1.9×) activity multipliers
A sedentary office worker multiplies BMR by 1.2. A competitive athlete training multiple sessions daily multiplies by 1.9. The gap between these two multipliers can exceed 1,000 calories — the difference between weight loss and weight gain if you pick the wrong level.
Advanced Features of Our TDEE & Macro Tool
Basal Metabolic Rate (BMR) vs. TDEE: what’s the difference?
BMR is the calories you burn at complete rest (breathing, heart beating, organ function). TDEE is your BMR multiplied by your real-life activity level — it includes workouts, walking, NEAT (non-exercise activity thermogenesis), and even digestion. Most people underestimate TDEE by 300–600 calories because they forget NEAT and daily movement.
Automatic BMI calculation for a quick health snapshot
As soon as you enter weight and height, the tool instantly shows your Body Mass Index with a color-coded health category (underweight, normal, overweight, obese). This gives you an immediate context for your TDEE results without opening another tab.
Customized daily macro split: protein, carbs, and fats
After calculating TDEE, choose your goal (loss, maintenance, gain) and the tool instantly breaks your calories into grams of protein, carbohydrates, and fats using evidence-based ratios. High-protein options for muscle preservation, balanced splits for general health, or carb-cycling presets — all updated live.
Smart history saving: access your results via functional cookies
With your consent, the calculator securely saves your last inputs and results using functional cookies. Return anytime — from any device — and your previous calculations load instantly so you can track weekly changes, compare progress, or adjust goals without re-entering data.
How the Mifflin-St Jeor Formula Works
The math behind your calorie maintenance level
The Mifflin-St Jeor equation is the most accurate predictive formula for BMR in healthy adults. It replaced the older Harris-Benedict formula because it was validated on larger, more diverse populations.
For Men:
BMR = (10 × weight in kg) + (6.25 × height in cm) − (5 × age in years) + 5
For Women:
BMR = (10 × weight in kg) + (6.25 × height in cm) − (5 × age in years) − 161
TDEE is then calculated as: TDEE = BMR × Activity Multiplier
Step-by-step example: a 25-year-old at 70 kg
Male, 25 years old, 70 kg, 175 cm, moderately active (1.55× multiplier):
- BMR = (10 × 70) + (6.25 × 175) − (5 × 25) + 5 = 700 + 1,093.75 − 125 + 5 = 1,673.75 kcal
- TDEE = 1,673.75 × 1.55 = 2,594 kcal per day
This 25-year-old needs roughly 2,594 calories to maintain weight. For fat loss he would target 2,094 kcal; for muscle gain around 2,844 kcal.
Why the Mifflin-St Jeor formula is the fitness industry standard
Published in 1990 and repeatedly validated in peer-reviewed studies, it has the lowest average error rate (±5–10 %) compared with lab-measured metabolic rates. Trainers, dietitians, and apps worldwide rely on it because it works across ages 18–80, both genders, and a wide range of body compositions.
How to Use Your Results for Weight Loss or Muscle Gain
Setting a caloric deficit for sustainable fat loss
Subtract 300–750 calories from your TDEE for a moderate, muscle-preserving deficit. This creates 0.25–0.75 kg (0.5–1.5 lb) of weekly fat loss while keeping energy levels high and hunger manageable.
| Goal | Adjustment | Weekly Fat Loss | Example (TDEE 2,600 kcal) |
|---|---|---|---|
| Mild deficit | −300 kcal | 0.25 kg | 2,300 kcal |
| Moderate deficit | −500 kcal | 0.5 kg | 2,100 kcal |
| Aggressive deficit | −750 kcal | 0.75 kg | 1,850 kcal |
Calculating a caloric surplus for effective muscle building
Add 250–500 calories above TDEE for a lean bulk. Combined with progressive overload training and high protein, this supports 0.25–0.5 kg of muscle gain per month with minimal fat accumulation.
Example: TDEE 2,600 kcal → Lean bulk target = 2,850–3,100 kcal
Adjusting your protein intake for body recomposition
For simultaneous fat loss and muscle gain (recomp), keep calories near maintenance or a tiny deficit while setting protein at 1.8–2.2 g per kg of body weight. The rest of the macros can be split 40–50 % carbs and 25–35 % fats depending on training volume and personal preference. The TDEE & macro tool automatically calculates these optimized splits the moment you select “recomposition” mode.
Real-World TDEE Examples & Quick Tips
| Profile | BMR | Activity | TDEE | Recommended Goal |
|---|---|---|---|---|
| 25 y male, 70 kg, 175 cm | 1,674 kcal | Moderate (1.55×) | 2,594 kcal | Fat loss → 2,094 kcal |
| 32 y female, 58 kg, 162 cm | 1,312 kcal | Sedentary (1.2×) | 1,574 kcal | Maintenance → 1,574 kcal |
| 28 y male athlete, 82 kg, 180 cm | 1,912 kcal | Athlete (1.9×) | 3,633 kcal | Muscle gain → 3,883 kcal |
More Health Tools to Explore
Pair your TDEE tracking with these other free, fast calculators from our collection:
- BMI Calculator — instant body-mass index and health category
- Body Fat Calculator — estimate your body-fat percentage from measurements
- Macro Calculator — fine-tune protein, carbs, and fats after your TDEE
- Calorie Calculator — cross-check your daily intake against TDEE goals
Master your TDEE, master your body. Our free TDEE Calculator is fast, accurate, science-backed, and always available — whether you train in the gym, work from home, or travel the world. Bookmark it today and turn every meal into progress.