TDEE Calculator
Discover your Total Daily Energy Expenditure and optimize your metabolism.
Metabolic Intelligence Suite
Free TDEE Calculator
ZA
Medically reviewed by Dr. Zohaib Ali, MO
Last updated April 2026
TDEE estimates are for informational purposes only. Consult a healthcare professional before making significant dietary changes.
Find Your Total Daily Energy Expenditure, BMR & Calorie Goals
What is TDEE, and how is it calculated?
TDEE (Total Daily Energy Expenditure) is the total number of calories your body burns every day, including rest, activity, and food digestion.
It is calculated by multiplying your Basal Metabolic Rate (BMR) by an activity multiplier. BMR is estimated using the Mifflin-St Jeor equation:
For men: BMR = (10 × weight kg) + (6.25 × height cm) − (5 × age) + 5
For women: BMR = (10 × weight kg) + (6.25 × height cm) − (5 × age) − 161
Your TDEE is then: BMR × Activity Factor (ranging from 1.2 for sedentary to 1.9 for very active athletes).
Every diet plan, every fitness goal, every 'how many calories should I eat' question has the same starting point: your TDEE, Total Daily Energy Expenditure. It is the single number that tells you how much your body actually burns in a full day. Get it right, and your calorie targets make sense. Get it wrong, and no amount of dieting or training will produce consistent results.
Most people either don't know their TDEE or are working from a rough estimate that's 300–500 calories off, enough to completely stall fat loss or sabotage a lean bulk.
This TDEE calculator uses the Mifflin-St Jeor equation, the formula considered most accurate by the American Council on Exercise for healthy adults. Enter your age, sex, height, weight, and activity level. In seconds, you get your BMR, your full TDEE, and calorie targets for weight loss, maintenance, and muscle gain, along with a macro breakdown for each goal.
Free, no signup, no email capture, no ads. Just the most important number in your nutrition plan.
The 4 Components of TDEE: Where Your Calories Actually Go
TDEE is not one number; it is the sum of four distinct energy systems in your body. Understanding each one explains why two people of the same weight and workout schedule can burn completely different amounts of calories each day.
| Component | Abbr. | What It Is | % of TDEE | Control |
|---|---|---|---|---|
| Basal Metabolic Rate | BMR | Calories burned at complete rest — breathing, heartbeat, cell repair | 60%–75% | Low |
| Thermic Effect of Food | TEF | Energy used to digest and process food. Protein costs the most (20-30%) | ~10% | Moderate |
| Exercise Activity | EAT | Intentional exercise — gym sessions, runs, classes | 5%–15% | High |
| Non-Exercise Activity | NEAT | Movement that isn't formal exercise — walking, standing, fidgeting | 15%–30% | High |
The NEAT Factor:NEAT is the most underestimated and most variable component of TDEE. A desk worker and a nurse of the same weight, same gym schedule, and same BMR can have TDEEs that differ by 600–1,000 calories per day entirely due to NEAT. This is why 'I exercise 5 days a week but can't lose weight' is often a NEAT problem, not a workout problem.
The 3 BMR Formulas: Which One Should You Use?
All TDEE calculators start with a BMR (Basal Metabolic Rate) estimate. Three main formulas are in common use, each with different strengths depending on your body composition:
| Formula | Best For | Inputs Required | Accuracy Notes |
|---|---|---|---|
| Mifflin-St Jeor (1990) | Most adults — the standard recommendation | Age, sex, height, weight | Most validated for general population; recommended by ACE. Can underestimate for muscular individuals. |
| Harris-Benedict (rev 1984) | General use — older but widely known | Age, sex, height, weight | Slightly less accurate than Mifflin-St Jeor for most adults. Tends to overestimate for sedentary people. |
| Katch-McArdle | Athletes with known body fat % | Lean Body Mass (req. BF%) | Most accurate when body fat % is known. Best choice for bodybuilders or very muscular people. |
This calculator uses Mifflin-St Jeor as the default; it is the most accurate for the widest range of body types. If you know your body fat percentage, the Katch-McArdle formula will give a more precise result, particularly if you carry significantly more or less muscle than average for your weight.
Mifflin-St Jeor Formula (for reference):
Men: BMR = (10 × weight in kg) + (6.25 × height in cm) − (5 × age in years) + 5
Women: BMR = (10 × weight in kg) + (6.25 × height in cm) − (5 × age in years) − 161
Then: TDEE = BMR × Activity Multiplier
Activity Multipliers: The Number That Changes Everything
The activity multiplier is the biggest source of error in any TDEE estimate. Most people overestimate their activity level by one full tier, which adds 200–400 phantom calories to their calculated TDEE and explains why they're 'eating at a deficit but not losing weight.'
| Activity Level | Multiplier | Who This Actually Describes | Common Mistake |
|---|---|---|---|
| Sedentary | 1.2 | Desk job, little walking, no structured exercise | Underestimating walking — if truly sedentary with NO exercise, use this. |
| Lightly Active | 1.375 | 1–3 days/week of light exercise OR active job | Office worker who walks 30 mins/day or light yoga 2x/week |
| Moderately Active | 1.55 | 3–5 days/week moderate exercise (45–60 min) | Most gym-goers who sit at a desk 8 hrs/day — most overused tier |
| Very Active | 1.725 | Hard training 6–7 days/week OR physical job | Construction workers who also train, or serious athletes |
| Extremely Active | 1.9 | 2x/day training, elite athletes, heavy labor | Very few genuinely qualify — drop down one level if unsure |
The Practical Rule:If you sit at a desk for 8+ hours, even if you train 5 days a week, choose 'Moderately Active' at most, not 'Very Active.' Your NEAT (steps, standing, walking) during the workday drives the higher multipliers. A gym-goer with a sedentary desk job typically has a lower TDEE than the multiplier table implies.
Step-by-Step TDEE Calculation: A Real Example
Let's walk through the full calculation for two different people so the math is completely clear:
| Metric | Example 1: Sarah | Example 2: Marcus |
|---|---|---|
| Profile | 32-year-old woman, 145 lbs (65.9 kg), 5'5" (165 cm) | 28-year-old man, 185 lbs (83.9 kg), 5'11" (180 cm) |
| Activity Level | Lightly Active (WFH, walks daily, yoga 2x/week) | Moderately Active (office job, lifts 4x/week) |
| Step 1: BMR | 1,421 cal/day | 1,904 cal/day |
| Step 2: Activity | 1,421 × 1.375 = 1,954 cal/day | 1,904 × 1.55 = 2,951 cal/day |
| TDEE (Maint) | ~1,954 calories/day | ~2,951 calories/day |
| Weight Loss | ~1,454 calories/day (1 lb/week loss) | ~2,451 calories/day (1 lb/week loss) |
| Lean Bulk | ~2,204 calories/day | ~3,201 calories/day |
Using Your TDEE for Every Goal: Weight Loss, Maintenance & Muscle Gain
Once you know your TDEE, every calorie goal is calculated from that single baseline. Here is the complete goal-based framework used by coaches and registered dietitians:
| Goal | Calorie Target | Rate of Change | Notes & Limits |
|---|---|---|---|
| Aggressive Fat Loss | TDEE − 750 to − 1,000 cal | 1.5–2 lbs/week | Maximum sustainable rate. Higher deficits increase muscle loss risk. Never go below BMR. |
| Moderate Fat Loss | TDEE − 300 to − 500 cal | 0.5–1 lb/week | Best balance of fat loss speed and muscle preservation. Most sustainable long-term. |
| Slow Cut | TDEE − 150 to − 250 cal | 0.25–0.5 lbs/week | Ideal for athletes or those close to goal weight. |
| Maintenance | Eat at TDEE | Weight stable | Recalculate every 8–12 weeks or after 10+ lb change. |
| Lean Bulk (Recomp+) | TDEE + 150 to + 250 cal | 0.25–0.5 lbs muscle/week | Minimizes fat gain during muscle building. |
| Moderate Bulk | TDEE + 300 to + 500 cal | 0.5–1 lb/week | Faster muscle gain but more fat accumulation. Best for beginners. |
| Aggressive Bulk | TDEE + 500+ cal | 1+ lb/week | Not recommended — excess calories beyond 500 primarily add fat. |
Key Safety Rule:Never eat below your BMR for extended periods. The BMR is your body's minimum calorie requirement to maintain basic organ function. Eating below it consistently leads to metabolic adaptation (your metabolism slowing to compensate), muscle loss, hormonal disruption, and nutrient deficiencies. For weight loss, always create your deficit from TDEE, not from BMR.
Minimum safe intakes as a hard floor: 1,200 calories/day for women, 1,500 calories/day for men. If your TDEE minus your deficit target falls below these floors, reduce the deficit size rather than the intake floor.
Macro Breakdown by Goal: Protein, Carbs & Fat Targets
Once you have your calorie target, the next step is splitting it into macronutrients. Here are the evidence-based macro ranges for each goal, based on research-supported protein targets and practical carb/fat splits:
| Goal | Protein | Carbohydrates | Fat | Protein Target Notes |
|---|---|---|---|---|
| Fat Loss / Cutting | 35%–40% | 30%–40% | 20%–30% | High protein protects muscle during deficit. Target 0.8–1.2g per lb bodyweight. |
| Maintenance | 25%–35% | 35%–45% | 25%–35% | Standard balanced split. 0.7–1.0g protein per lb bodyweight. |
| Lean Bulking | 25%–30% | 40%–50% | 20%–30% | Carbs support training performance. Protein 0.8–1.0g/lb. |
| Aggressive Bulk | 20%–25% | 45%–55% | 20%–30% | Higher carbs fuel training volume. Protein still min 0.7g/lb. |
| Keto / Low Carb | 25%–35% | 5%–10% | 55%–65% | Requires electrolyte management. Fat adaptation takes 2–4 weeks. |
Practical macro math (175 lb person cutting at 2,200 calories):
Protein (35%)
770 cal ÷ 4 = 192g (~1.1g/lb ✅)
Carbs (35%)
770 cal ÷ 4 = 192g
Fat (30%)
660 cal ÷ 9 = 73g
Why Your TDEE Calculator Result Might Be Wrong And How to Fix It:
This is the section no competitor covers well, and it is the most searched question from frustrated users: 'I'm eating at my TDEE deficit but not losing weight.' Here are the 7 most common reasons, in order of likelihood:
| Reason | How Common | What's Happening | The Fix |
|---|---|---|---|
| Wrong Activity Level | #1 cause — 60%+ | One tier too high adds 250–400 ghost calories to your TDEE. | Drop one activity level. Adjust after 2–3 weeks of tracking. |
| Underestimating Intake | #2 cause | Not weighing food, eyeballing portions, forgetting oils/sauces/drinks. | Use a food scale for 2 weeks. Log EVERYTHING. |
| Water Retention | #3 cause | Muscles retain water with new workouts. Weight can stay flat while fat drops. | Track weight as a 7-day average. Measure body fat % monthly. |
| Metabolic Adaptation | #4 cause | After 8–12+ weeks of deficit, metabolism slows 10–15%. | Take a 1–2 week diet break. Recalculate after weight loss. |
| Body Composition | #5 cause | Standard formulas assume avg muscle. Muscular people have higher BMRs. | Use Katch-McArdle formula if you know your body fat %. |
| Hormonal/Medical | #6 — Less Common | Thyroid (hypo), PCOS, insulin resistance, or medications. | If accurate tracking fails for 4+ weeks, consult a physician. |
| Exercise Double-Counted | #7 — Common Myth | Adding burned calories back to a TDEE that already included them. | Do NOT eat back exercise calories if you used a multiplier. |
How TDEE Changes With Age: The Metabolism Slowdown Explained
One of the most common fitness frustrations is the feeling that 'the same diet that worked at 25 doesn't work at 40.' This is real, and TDEE calculators that don't explain it miss the most important context for older users.
| Age Range | Typical BMR Change | Primary Driver | What to Do About It |
|---|---|---|---|
| 20s | Peak BMR for most people | High muscle mass, active hormones (testosterone, estrogen) | Establish strong strength habits now to protect future metabolism. |
| 30s | −1% to −2% per decade | Gradual muscle mass decline (sarcopenia) begins. | Maintain protein intake; keep lifting heavy to preserve muscle. |
| 40s–50s | −2% to −3% per decade | Hormonal changes (menopause/andropause); more sedentary lifestyle. | Recalculate TDEE every 6 mos; prioritize strength over cardio. |
| 60s+ | −3% to −5% per decade | Significant muscle loss; reduced NEAT naturally. | Resistance training is the #1 priority; higher protein needs. |
The average adult loses 3–8% of muscle mass per decade after age 30 without consistent resistance training. Since muscle burns approximately 6 calories per pound per day at rest (vs. 2 calories for fat), losing 10 lbs of muscle reduces BMR by about 60 calories/day and over 10 years, that compounds into a 200–300 calorie/day BMR reduction that most people attribute to 'slowing metabolism' but is actually 'losing muscle.'
The Fix:Strength training + adequate protein (0.8–1.2g per lb of bodyweight) are the only evidence-based methods to offset age-related metabolic decline. Adding 5 lbs of muscle through a year of progressive strength training raises BMR by approximately 30 calories/day — small but meaningful over decades.
TDEE for Special Populations: Pregnancy, Athletes & Teens
Standard TDEE formulas have meaningful limitations for specific populations. Here is what to know:
| Population | Formula Accuracy | Special Considerations | Recommendation |
|---|---|---|---|
| Pregnant Women | Not accurate | Needs increase +300-450 cal/day in 2nd/3rd trimesters. | Consult OB-GYN or dietitian — calculators are not appropriate. |
| Competitive Athletes | Moderate | Elite training can reach 3,500–6,000 cal/day. | Use sport-specific formulas or work with a sports dietitian. |
| Teens (Under 18) | Not accurate | Growth adds significant calorie needs beyond formula output. | Not recommended for teens — consult pediatrician. |
| Post-Bariatric Surgery | Not accurate | Altered GI tract changes nutrient absorption and metabolism. | Work exclusively with bariatric care team nutritionist. |
| Thyroid Disorders | 10–20% inaccurate | Hypothyroidism reduces BMR; hyperthyroidism increases it. | Consult physician before relying on TDEE-based planning. |
How to Track Progress and Adjust Your TDEE Over Time:
Your TDEE is not a static number — it changes as your weight, muscle mass, and age change. Here is the exact adjustment protocol fitness coaches use:
1
Start
Use this calculator to get your initial TDEE estimate. Set your calorie target based on your goal.
2
Track (2-3 Weeks)
Weigh daily (morning) and average the 7-day readings. Log all food accurately using a scale.
3
Evaluate Trend
If you're within 0.25 lbs of expected change, your TDEE estimate is close; continue.
4
Adjust if Needed
If scale isn't moving as expected, adjust by 100–200 calories and reassess for 2 weeks.
5
Recalculate (10-15 lbs)
As weight changes, your BMR changes. Recalculate to avoid plateaus after 10-15 lb loss.
6
Take Diet Breaks
Every 8–12 weeks of deficit, spend 1–2 weeks at maintenance to restore metabolic rate.
Frequently Asked Questions
What is TDEE, and why does it matter?
TDEE (Total Daily Energy Expenditure) is the total number of calories your body burns in 24 hours, including rest, activity, and food digestion. It matters because it is the baseline for every nutrition goal: weight loss requires eating below TDEE, muscle gain requires eating above it, and maintenance requires matching it. An inaccurate TDEE estimate is the most common reason diet plans fail to produce expected results.
How many calories should I eat to lose weight based on my TDEE?
For sustainable fat loss, eat 300–500 calories below your TDEE. This creates a deficit that results in approximately 0.5–1 lb of fat loss per week. A 500-calorie daily deficit creates a 3,500-calorie weekly deficit equivalent to approximately 1 lb of fat. Going deeper than 500–750 calories below TDEE increases the risk of muscle loss, metabolic adaptation, and difficulty sustaining the diet. Never eat below your BMR or below 1,200 calories/day (women) or 1,500 calories/day (men).
What is the difference between BMR and TDEE?
BMR (Basal Metabolic Rate) is the number of calories your body burns at complete rest just to keep your organs functioning, your heart beating, and your cells alive. It represents 60-75% of most people's TDEE. TDEE adds the energy you burn from physical activity, exercise, and food digestion on top of your BMR. TDEE is always higher than BMR, typically 20–90% higher, depending on how active you are. For calorie planning, always use TDEE, never use BMR as your calorie target.
Why am I not losing weight if I'm eating below my TDEE?
The most common reasons are: (1) the activity level selected is too high, overestimating your TDEE by 200–400 calories; (2) calorie intake is underestimated research shows people underreport by 30–50% on average without food scales; (3) water retention from a new workout routine masks fat loss on the scale; (4) metabolic adaptation from extended dieting has lowered your actual TDEE below what the formula predicts. Track for 3 weeks with a food scale and weigh daily, using a 7-day average. If the trend still isn't matching, reduce calories by 100–200 and reassess.
How accurate is a TDEE calculator?
TDEE calculators are typically accurate within 10–15% for most healthy adults when the activity level is chosen honestly. On a 2,500-calorie TDEE, that means the estimate could be off by 250–375 calories. Individual factors that reduce accuracy include unusual muscle mass (very high or very low), hormonal imbalances, thyroid disorders, certain medications, and long-term metabolic adaptation from dieting. Treat your calculated TDEE as a starting estimate and verify it against 2–3 weeks of real-world weight tracking before making further adjustments.
Should I eat back the calories burned during exercise?
It depends on how you used this calculator. If you selected an activity level that reflects your workout frequency (e.g., 'Moderately Active' because you train 4x/week), your exercise calories are already built into your TDEE, so do not eat them back. If you selected 'Sedentary' and plan to add exercise on top, you can eat back 50–75% of estimated exercise calories (not 100%, since calorie burn estimates from gym equipment and apps tend to be overstated by 20–30%).
How often should I recalculate my TDEE?
Recalculate your TDEE after any weight change of 10+ pounds, a significant change in activity level or job, or every 3–6 months during an active fitness program. As you lose fat and gain muscle, your BMR shifts accordingly. A 20 lb weight loss can reduce your TDEE by 100–200 calories/day, which is enough to plateau weight loss if left uncorrected. Also, recalculate after completing a diet break, returning from injury, or any significant lifestyle change.
What is a good TDEE for my age, sex, and height?
TDEE varies widely based on individual factors, but here are typical ranges as reference points for moderately active adults (activity multiplier ~1.55): Women aged 20–30, 5'4", 130–150 lbs: approximately 1,800–2,200 cal/day. Women aged 40–50, 5'4", 140–160 lbs: approximately 1,700–2,050 cal/day. Men aged 20–30, 5'10", 160–185 lbs: approximately 2,400–2,900 cal/day. Men aged 40–50, 5'10", 170–195 lbs: approximately 2,200–2,700 cal/day. These are illustrative ranges. Use this calculator with your exact measurements for a personalized estimate.
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