What is TDEE (Total Daily Energy Expenditure)?
TDEE stands for Total Daily Energy Expenditure — the total number of calories your body burns in a 24-hour period, including everything: keeping your organs running, digesting food, moving around and any intentional exercise.
Understanding your TDEE is the most important number in any nutrition plan. Eat below it and you lose weight. Eat at it and you maintain. Eat above it and you gain. Everything else — macros, meal timing, food choices — is secondary to this fundamental energy balance.
TDEE is calculated in two steps. First, your Basal Metabolic Rate (BMR) is calculated using the Mifflin–St Jeor equation — this is the energy needed just to keep you alive at rest. Then, BMR is multiplied by an activity factor that accounts for your movement throughout the day.
Formula
Men: BMR = (10 × kg) + (6.25 × cm) − (5 × age) + 5
Women: BMR = (10 × kg) + (6.25 × cm) − (5 × age) − 161
TDEE = BMR × Activity Multiplier
Activity levels in detail
The activity multiplier is the most impactful variable in the TDEE equation. A mistake here changes your result by hundreds of calories. The descriptions below will help you choose honestly:
Office worker who drives to work, uses the lift and watches TV in the evening. Fewer than 5,000 steps/day.
Someone who walks 30 min/day or goes to the gym 1–2 times per week but otherwise sits most of the day.
Person who exercises 3–5× per week with genuine intensity, or has a job that involves standing and walking.
Daily trainer, athlete in season, or someone with a physically demanding job (nurse, builder, postman).
Two-a-day athlete, elite sports competitor, or extremely demanding physical work all day.
What do you use TDEE for?
Once you know your TDEE, every nutrition decision becomes data-driven rather than guesswork:
Weight loss
Eat 250–500 kcal below your TDEE for sustainable fat loss of 0.25–0.5 kg/week. Larger deficits risk muscle loss.
Maintenance
Eat at your TDEE to hold your current weight. Crucial during diet breaks, competition prep or recovery phases.
Muscle gain
Eat 200–300 kcal above TDEE for lean bulk — enough to build tissue without excessive fat storage.
Recomposition
Eat close to TDEE (±100 kcal) with high protein to simultaneously lose fat and build muscle. Slower but effective.
Adjusting for days
Use TDEE as your weekly average. On heavy training days eat more; on rest days eat less. Same weekly total.
TDEE vs. BMR — what is the difference?
These two numbers are often confused. Here is a clear comparison:
| BMR | TDEE | |
|---|---|---|
| Definition | Calories burned at complete rest | Total calories burned including all activity |
| Use for | Understanding your baseline metabolism | Setting daily calorie intake targets |
| Typical value (70kg adult) | 1,600–1,800 kcal | 2,000–3,000 kcal |
| Eat at BMR? | No — dangerously low for most people | Yes — eating at TDEE = weight maintenance |
| Changes with | Weight, age, muscle mass | All BMR factors + daily activity level |
How to use your TDEE result
Your TDEE is not a fixed number for life. It changes as your weight, age, activity and muscle mass change. Recalculate it every 4–6 weeks, or whenever your circumstances change significantly.
The most common mistake is not adjusting TDEE as weight changes. If you started at 90 kg and now weigh 80 kg, your TDEE has dropped — which is why weight loss naturally slows down. Recalculate and adjust your intake accordingly. Calorie Calculator
Pro tip
Track your weight daily for 2 weeks while eating at your calculated TDEE. If you gain consistently, your real TDEE is lower. If you lose, it is higher. Use this data to calibrate your personal maintenance level.
Why TDEE estimates are imperfect
Every TDEE formula is a statistical average. It works well at the population level but your individual metabolism may differ by 10–20%.
- •Non-exercise activity thermogenesis (NEAT): Fidgeting, posture, spontaneous movement — this varies enormously between individuals and is not captured by any formula. It can account for 300–700 kcal/day difference.
- •Thermic effect of food (TEF): Your body burns calories digesting food. Protein causes a higher TEF (~30%) than carbs (~8%) or fats (~3%). Not modelled in TDEE formulas.
- •Adaptive thermogenesis: When in a deficit for extended periods, your body reduces TDEE beyond what the formula predicts — the 'starvation mode' effect.
- •Exercise intensity vs. volume: Two people both at '5 days/week training' might burn very different amounts depending on intensity, duration and type.
Important
TDEE calculators give estimates, not exact measurements. Treat your result as a starting point and adjust based on real-world results over 2–3 weeks.
TDEE calculator vs. Calorie calculator
This page — TDEE Calculator
- ✓ Shows all 5 activity levels at once
- ✓ Focuses on how much you burn
- ✓ Deep dive into activity science
- ✓ Best starting point for any plan
- → Adds a goal (lose / maintain / gain)
- → Shows your adjusted daily target
- → Connects to macro planning
- → Best for active dieters