Free TDEE Calculator
Three formulas (Mifflin-St Jeor, Harris-Benedict, Katch-McArdle), step-count PAL tuning, metric and imperial units. Sources: Academy of Nutrition and Dietetics 2024, WHO/IOM.
Key Takeaways
- TDEE is your total daily energy expenditure — the sum of every calorie your body burns in 24 hours, from breathing to running.
- The Mifflin-St Jeor formula is the most accurate for most adults, predicting resting metabolism within about 10% of lab-measured values, according to the Academy of Nutrition and Dietetics.
- Overestimating your activity level is the most common mistake people make — it can inflate your calorie estimate by 15–20% and sabotage weight loss goals.
- Using your TDEE to create a calorie deficit of 500 kcal per day leads to roughly 1 pound of fat loss per week, a safe and sustainable rate.
Table of Contents
What is a TDEE Calculator?
A TDEE calculator estimates your total daily energy expenditure — the total number of calories your body burns every single day. Think of it as your body's daily fuel gauge. It tells you exactly how much energy you use up just by existing, moving around, digesting food, and exercising.
TDEE stands for Total Daily Energy Expenditure. It is the sum of four things: your basal metabolic rate (the calories burned at complete rest), the energy used to digest food, intentional exercise, and all the small movements you make throughout the day like walking, fidgeting, or standing. About 60 to 75% of your TDEE comes from your resting metabolism alone.
Knowing your TDEE is the foundation of any effective nutrition plan. According to the CDC, about 42% of U.S. adults are classified as obese and roughly 25% are physically inactive, which makes understanding daily calorie needs more important than ever. A total daily energy expenditure calculator gives you a personalized starting point so you are not guessing with your food intake. Once you know your TDEE, you can adjust calories up or down to lose weight, maintain your current weight, or build muscle with confidence.
Our TDEE calculator for weight loss goes beyond a single number. It delivers maintenance calories, mild and aggressive deficit targets, surplus ranges, macronutrient recommendations, and even a projected weight change timeline — all in one dashboard. You can also toggle between metric and imperial units, choose from three scientifically validated formulas, and fine-tune your activity level using your daily step count. The Academy of Nutrition and Dietetics recommends the Mifflin-St Jeor equation as the most reliable for estimating resting energy needs in most adults.
TDEE Calculator Formula
Every TDEE calculator with activity level follows the same two-step logic. First, calculate your basal metabolic rate (BMR) — the calories you would burn if you stayed in bed all day. Second, multiply that BMR by a physical activity level multiplier, or PAL, that represents how active your lifestyle is. The result is your TDEE.
Our calculator supports three different BMR formulas. You can switch between them to compare results and see which one aligns best with your body composition and goals.
Mifflin-St Jeor (1990) — Recommended Default
Men: BMR = 10 × weightkg + 6.25 × heightcm − 5 × age + 5
Women: BMR = 10 × weightkg + 6.25 × heightcm − 5 × age − 161
Harris-Benedict (Revised 1984)
Men: BMR = 66.5 + (13.75 × weightkg) + (5.003 × heightcm) − (6.775 × age)
Women: BMR = 655.1 + (9.563 × weightkg) + (1.85 × heightcm) − (4.676 × age)
Source: PubMed 2023 revision
Katch-McArdle — Requires Body Fat Percentage
Lean Body Masskg = weightkg × (1 − body fat% ÷ 100)
BMR = 370 + (21.6 × Lean Body Masskg)
Source: Nutrium blog 2024
After calculating your BMR, the calculator multiplies it by your PAL. The activity multipliers we use follow WHO and IOM standards:
| Activity Level | PAL Multiplier | What It Means |
|---|---|---|
| Sedentary | 1.2 | Little to no exercise, desk job |
| Lightly Active | 1.375 | Light exercise 1–3 days per week |
| Moderately Active | 1.55 | Moderate exercise 3–5 days per week |
| Very Active | 1.725 | Hard exercise 6–7 days per week |
| Super Active | 1.9 | Very hard daily training or physical job |
Here is what makes our calculator different: if you enter your daily step count, the tool dynamically adjusts your PAL. For every 2,000 steps you take above 5,000 steps per day, we add 0.025 to your multiplier. So 10,000 daily steps would shift a sedentary baseline of 1.2 up to about 1.26 — a more precise reflection of your actual daily movement. The maximum PAL is capped at 1.9.
The final TDEE calculator metric result is simply BMR × PAL. For non-binary and transgender users, please note that these formulas use sex-based averages. Accuracy may vary by ±10–20% due to hormonal and body composition differences. We recommend consulting a registered dietitian for personalized guidance if standard assumptions do not fit your physiology.
How to Calculate TDEE Step by Step
You do not need a calculator to understand the math. Here is a manual walkthrough using the Mifflin-St Jeor formula, the one most dietitians trust.
- Gather your data. You need your weight in kilograms, your height in centimeters, your age in years, and your biological sex. For this example, we will use a 30-year-old male who weighs 70 kg and stands 170 cm tall.
- Calculate your BMR. Plug the numbers into the male Mifflin-St Jeor formula: BMR = (10 × 70) + (6.25 × 170) − (5 × 30) + 5. That gives you 700 + 1,062.5 − 150 + 5 = 1,617.5 kcal/day. This is how many calories his body burns at complete rest.
- Pick your activity level honestly. Our example person exercises moderately 4 days a week and has a somewhat active lifestyle. That matches the "Moderately Active" category with a PAL of 1.55. If you are unsure, always pick the lower option. Most people overestimate their activity.
- Multiply BMR by PAL. TDEE = 1,617.5 × 1.55 = 2,507 kcal/day. That is his maintenance calorie calculator result — the number of calories he needs to eat daily to stay exactly at his current weight.
- Adjust for your goal. To lose about 1 pound per week, subtract 500 kcal: 2,507 − 500 = 2,007 kcal/day. To gain muscle slowly, add 250 kcal: 2,507 + 250 = 2,757 kcal/day. The calculator does all these adjustments automatically and displays them in your results dashboard.
TDEE Calculator Examples
Different bodies, different lifestyles, different numbers. Here are three realistic scenarios to show you how the total daily energy expenditure calculator adapts to various situations.
Example 1: Female Desk Worker, Lightly Active
Scenario: Sarah is 35 years old, works a 9-to-5 office job, and does light yoga twice a week. She weighs 65 kg and is 165 cm tall. She wants to know how many calories she burns in a day so she can create a safe calorie deficit for weight loss.
Calculation (Mifflin-St Jeor): BMR = (10 × 65) + (6.25 × 165) − (5 × 35) − 161 = 650 + 1,031.25 − 175 − 161 = 1,345 kcal/day. With a lightly active PAL of 1.375, her TDEE = 1,345 × 1.375 = 1,850 kcal/day.
What this means: Sarah maintains her weight at about 1,850 calories per day. For steady weight loss, she could target a mild deficit of 1,600 kcal/day or an aggressive deficit of 1,350 kcal/day. The aggressive deficit would yield roughly 1 pound of fat loss per week. She can also check her BMI calculator results to get a broader picture of her weight-to-height health status.
Example 2: Male Athlete, Moderately Active
Scenario: Marcus is 28, lifts weights 4 times a week, and runs on weekends. He weighs 80 kg and is 178 cm tall. His goal is to build muscle with a slight calorie surplus.
Calculation (Mifflin-St Jeor): BMR = (10 × 80) + (6.25 × 178) − (5 × 28) + 5 = 800 + 1,112.5 − 140 + 5 = 1,778 kcal/day. With a moderately active PAL of 1.55, his TDEE = 1,778 × 1.55 = 2,755 kcal/day.
What this means: Marcus needs roughly 2,755 calories to maintain his weight. A mild surplus of 3,005 kcal/day supports slow muscle gain without excessive fat gain. An aggressive surplus of 3,255 kcal/day could work if he is in a serious bulking phase. For the best results, he should also use our macronutrient calculator to split those calories into the right balance of protein, carbs, and fats for muscle growth.
Example 3: Using Katch-McArdle with Body Fat Percentage
Scenario: Jordan has been tracking body composition and knows their body fat is 20%. They weigh 75 kg and want a more precise TDEE estimate based on lean mass rather than total weight.
Calculation (Katch-McArdle): Lean Body Mass = 75 × (1 − 0.20) = 60 kg. BMR = 370 + (21.6 × 60) = 370 + 1,296 = 1,666 kcal/day. With a moderately active PAL of 1.55, TDEE = 1,666 × 1.55 = 2,582 kcal/day.
What this means: The Katch-McArdle formula is especially useful if you have more muscle or less muscle than average for your weight. Jordan's TDEE of 2,582 kcal/day is slightly higher than what the Mifflin-St Jeor formula would estimate for the same weight, because lean mass drives metabolic rate. Knowing your exact body fat percentage makes a real difference. Try our body fat percentage calculator if you do not have a current measurement.
TDEE Calculator Tips & Common Mistakes
Even the most accurate formula cannot save you from bad inputs. These are the most common errors people make when using a TDEE calculator for weight loss — and how to avoid them.
| Common Mistake | Why It Matters | What to Do Instead |
|---|---|---|
| Overestimating activity level | Picking "moderate" when you are really "light" can inflate TDEE by 15–20%. That is an extra 300–400 calories per day in some cases. | Start one level lower than you think. Track your weight for two weeks at that calorie target. Adjust up only if you are losing weight unintentionally. |
| Forgetting to update inputs | If you lose 10 kg, your BMR drops. Using old numbers means eating above your actual needs. | Recalculate your TDEE every 4–6 weeks, especially after noticeable weight changes. |
| Ignoring body fat percentage | Two people at the same weight can have very different lean mass. Katch-McArdle is far more accurate when body fat is known. | If you have a body fat estimate, use it with the Katch-McArdle formula. Even a rough estimate is better than ignoring lean mass entirely. |
| Trusting fitness tracker calorie burn | Wearables can overestimate exercise calorie burn by 20–30%, according to published validation studies. | Use tracker data as a relative trend, not an absolute number. Rely on the TDEE formula and real-world weight changes for your calorie targets. |
| Using TDEE during pregnancy or lactation | Standard TDEE formulas do not apply. Energy needs increase significantly during these periods. | Consult a healthcare provider. Pregnant and lactating users should use specialized calculators that account for these increased energy demands. |
If your BMI is below 16 or above 50, standard formulas may be off by more than 20%. The same caution applies if you are under 18 or over 80 — these equations were not validated on those populations. The Academy of Nutrition and Dietetics recommends indirect calorimetry for anyone needing clinical precision. For everyone else, a maintenance calorie calculator like ours provides an excellent starting point that you can refine with real-world tracking.
Frequently Asked Questions
How do I calculate my TDEE manually?
First, calculate your BMR using the Mifflin-St Jeor formula: For men, BMR = (10 × weight in kg) + (6.25 × height in cm) − (5 × age) + 5. For women, subtract 161 instead of adding 5. Then multiply your BMR by your activity level multiplier. Sedentary is 1.2, lightly active is 1.375, moderately active is 1.55, very active is 1.725, and super active is 1.9. The result is your TDEE — your total daily calorie burn.
What is a good TDEE for weight loss?
There is no universal "good" TDEE — it depends on your body size, age, and activity level. What matters is the calorie deficit you create from your personal TDEE. A daily deficit of 500 calories below your TDEE leads to roughly 1 pound of fat loss per week. A milder deficit of 250 calories per day yields about half a pound per week. Both are considered safe and sustainable by most dietitians.
Why does my TDEE calculator show different results from fitness trackers?
Fitness trackers estimate calorie burn using heart rate and movement data, while a TDEE calculator uses population-based formulas. Trackers can overestimate exercise burn by 20–30%. Additionally, different calculators may use different BMR formulas — Mifflin-St Jeor, Harris-Benedict, or Katch-McArdle — each producing slightly different results. For consistency, stick with one method and adjust based on your actual weight changes over time.
Can I use a TDEE calculator if I'm non-binary or transgender?
Yes, but with an important caveat. Standard TDEE formulas use sex-based averages for body composition and hormonal profiles. Results may vary by ±10–20% for non-binary and transgender individuals, especially if hormone therapy is involved. Choose the biological sex category that most closely matches your hormonal profile, or consult a registered dietitian for a personalized assessment using indirect calorimetry.
Are TDEE calculators accurate for pregnant or elderly users?
No, standard TDEE calculators are not validated for pregnant or lactating individuals. Energy needs increase by approximately 300–500 kcal per day during pregnancy and lactation. For adults over 80 or under 18, the formulas were developed using data from the 19–78 age range and may be less reliable. In all these cases, seek guidance from a healthcare provider or a registered dietitian.
What is the difference between BMR and TDEE?
BMR, or basal metabolic rate, is the number of calories your body burns at complete rest — just to keep your heart beating, lungs breathing, and brain functioning. TDEE includes BMR plus all additional energy burned through digestion, daily movement, and exercise. BMR typically accounts for 60–75% of your TDEE. Think of BMR as your baseline and TDEE as your total daily calorie engine.
How do activity levels affect my TDEE?
Activity level is the multiplier that turns BMR into TDEE. A sedentary person with a PAL of 1.2 adds only 20% to their BMR, while a super active person with a PAL of 1.9 nearly doubles it. For example, a BMR of 1,500 kcal becomes a TDEE of 1,800 at sedentary and 2,850 at super active. Even small changes — like adding 2,000 more daily steps — can increase your PAL by about 0.025 and make a measurable difference over weeks.
How can I use my TDEE to create a calorie deficit?
Subtract 250–500 calories from your TDEE to create a daily deficit. A 500-calorie deficit produces about 1 pound of fat loss per week, based on the established estimate that 3,500 calories equal roughly 1 pound of body fat. For weight gain or muscle building, add 250–500 calories instead. Track your weight weekly and adjust your intake if results stall — your TDEE changes as your body weight and composition shift.
Related Calculators
If you found this TDEE calculator helpful, you might also need these tools to complete your nutrition and fitness planning:
Your TDEE is not a static number. It shifts as your weight, body composition, age, and activity habits change. Revisit your numbers every month or so, stay honest about your activity level, and let the data guide your decisions — not guesswork. Scroll back up and try our TDEE calculator now. It takes less than a minute and gives you a complete, personalized calorie blueprint for any fitness goal.