TDEE Calculator
Total Daily Energy Expenditure — how many calories your body actually burns each day. The number that governs weight management.
What this means
What to consider
Medications that may affect your result
Thyroid medications (levothyroxine, liothyronine) directly affect your BMR — the largest component of TDEE. Hypothyroidism slows metabolic rate; treatment restores it. If your dose has recently changed, your TDEE may be shifting.
Beta-blockers (metoprolol, atenolol, propranolol) reduce heart rate and can lower exercise capacity. This may reduce the exercise component of your TDEE, though the overall impact is modest since exercise is already the smallest slice.
Your baseline may differ from the general population. Discuss with your healthcare provider.
About this tool
Formula
TDEE = BMR × Activity Multiplier. Multipliers: Sedentary 1.2, Lightly Active 1.375, Moderately Active 1.55, Very Active 1.725, Extra Active 1.9. Based on the Harris-Benedict activity factors widely used in clinical and sports nutrition.
Component Breakdown
The stacked bar shows estimated TDEE composition: BMR (~60–70%), TEF (~10%), NEAT (~15–20%), Exercise (~5–10%). These are population averages — individual variation is significant, particularly in NEAT.
Limitations
Activity multipliers are broad averages — individual variation is significant. Less accurate for people with metabolic conditions affecting energy expenditure (thyroid disorders, PCOS, lipodystrophy). Activity descriptions are written to be movement-inclusive — not exercise-centric. People who use wheelchairs, manage chronic fatigue, or are in rehabilitation can select the tier that best matches their daily energy output.
Sources
Harris-Benedict activity factors. Levine JA, Non-exercise activity thermogenesis (NEAT), Best Practice & Research Clinical Endocrinology & Metabolism, 2002. Westerterp KR, Diet-induced thermogenesis, Nutrition & Metabolism, 2004.
Educational tool only. Not for diagnostic purposes. Consult a healthcare provider for medical decisions.