TDEE Calculator Online
Estimate your total daily energy expenditure from BMR and activity level, entirely in your browser. A general estimate only, not medical advice.
The TDEE Calculator runs entirely in your browser. Your weight, height, age, and activity level never leave your device, and this is a general estimate, not medical advice.
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About TDEE Calculator
TDEE Calculator estimates the total number of calories your body burns in a day once activity is factored in, so you have a starting point for maintaining, losing, or gaining weight. It first works out your BMR (basal metabolic rate) with the Mifflin-St Jeor equation from your weight, height, age, and sex, then multiplies that figure by an activity multiplier ranging from sedentary (1.2) to very active (1.9) to produce your TDEE. Switch between metric and US units, pick the activity level that matches your week, and copy a plain-text summary of both figures. This is a general estimate from a standard formula, not medical advice — everyone's metabolism varies. Everything runs locally in your browser, and your body measurements never leave your device.
Features
- Estimates BMR with the widely used Mifflin-St Jeor equation
- Applies five standard activity multipliers from sedentary to very active
- Shows both BMR and TDEE side by side for comparison
- Toggle between metric (kg / cm) and US (lb / ft-in) units
- Separate inputs for weight, height, age, and sex
- One-click copy of a plain-text summary of your results
- Clear error message when an input is missing or invalid
- Runs entirely in your browser — no body measurements are uploaded
How to use the TDEE Calculator
- Choose metric or US units
- Enter your weight, height, age, and sex
- Pick the activity level that best matches your typical week
- Read your BMR and TDEE, then copy the summary if you need it
Example
Input
BMR 1780, moderate
Output
TDEE: 2,759 cal/day
1780 × 1.55 (moderate activity multiplier) = 2759 calories per day.
Common errors & troubleshooting
- TDEE seems far higher or lower than expected. — Double-check the activity level — 'moderately active' assumes exercise 3-5 days a week, not a desk job with an occasional walk. Pick 'sedentary' if you are mostly inactive.
- Height and weight look wrong after switching units. — Re-enter the values after toggling between metric and US — the calculator does not auto-convert existing numbers, it reads fresh input in the selected unit.
- The banner says to enter a weight, height, and age greater than 0. — Every field must be a positive number; in US mode both the feet and inches fields for height need a value, even if inches is 0.
- TDEE looks the same after changing sex but not activity. — Sex changes BMR by a fixed offset (about 166 calories between the male and female formula), which is smaller than switching activity levels — try a bigger activity change to see a clearer difference.
Frequently asked questions
- What does the TDEE Calculator actually calculate?
- It estimates your Total Daily Energy Expenditure — the calories you burn in a day including activity — by first computing BMR with the Mifflin-St Jeor equation, then multiplying it by an activity multiplier.
- How is TDEE different from BMR in this calculator?
- BMR is the calories your body burns at complete rest. TDEE takes that BMR and scales it up by your activity level, since daily movement and exercise burn additional calories on top of your resting rate.
- Which activity multiplier should I choose in the TDEE Calculator?
- Sedentary (1.2) fits little or no exercise, light (1.375) fits 1-3 light workouts a week, moderate (1.55) fits 3-5 days, active (1.725) fits 6-7 days, and very active (1.9) fits hard daily training or a physical job.
- Can I use pounds and feet-inches in the TDEE Calculator?
- Yes. Switch the unit toggle to US and enter weight in pounds and height in feet and inches; the calculator converts everything to metric internally before running the formula.
- Is the TDEE Calculator accurate for everyone?
- It gives a general estimate using a standard formula, not medical advice. Actual calorie needs vary with muscle mass, genetics, and health conditions, so treat the number as a starting point and adjust based on real-world results.
- Does the TDEE Calculator store or upload my body measurements?
- No. Every calculation happens locally in your browser. The weight, height, age, and sex you enter are never sent to ArrayKit or stored anywhere.
Related tools
- BMR Calculator — Estimate your basal metabolic rate — the calories your body burns at rest.
- Calorie Calculator — Estimate daily calories to maintain, lose or gain weight from your stats.
- Macro Calculator — Split your daily calories into protein, carbs and fat grams by ratio.
- Protein Calculator — Estimate your daily protein needs from weight and activity level.
- Carbohydrate Calculator — Estimate daily carbohydrate grams from your calories and diet split.
- Fat Intake Calculator — Estimate daily dietary fat grams from your calories and target percentage.
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