TDEECalculator.AI

TDEE Calculator

Find out how many calories you burn each day, and how much to eat to reach your goal.

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Short answer

Your TDEE (total daily energy expenditure) is how many calories you burn in a day. Eat that many and your weight stays about the same. Eat about 500 fewer a day and most people lose around 1 lb (0.45 kg) a week at first.

What makes up your TDEE

~70%Resting burn (BMR)
~20%Movement and exercise
~10%Digesting food

How this calculator works

  1. Resting burn. We estimate your BMR with the Mifflin-St Jeor equation: 10 × weight (kg) + 6.25 × height (cm) − 5 × age, then +5 for men or −161 for women. If you enter your body fat, we use Katch-McArdle instead, which is based on lean mass.
  2. Activity. We multiply your BMR by your activity level, from 1.2 to 1.9.
  3. Goal. On the results screen, pick lose, maintain or gain and a weekly pace. We rate each pace against your body weight and never go below a safe minimum.
Activity levels
LevelMultiplierLooks like
Sedentary1.2Desk job, under 5,000 steps a day
Light1.3755,000–7,500 steps, or exercise 1–3 days
Moderate1.55Exercise 3–5 days a week
Very active1.725Hard exercise 6–7 days
Athlete1.9Training twice a day or a physical job

Example: why your activity level matters most

Take a 30-year-old man who is 5 ft 10 in and 180 lb. His BMR is about 1,783 calories. Here is his TDEE at each activity level:

Activity levelTDEE (calories a day)
Sedentary2,139
Light2,451
Moderate2,763
Very active3,075
Athlete3,387

One step up or down changes his number by about 300 calories a day. That's why we suggest picking the lower level when you're unsure: most people overestimate how active they are.

How accurate is it?

No formula knows your body exactly. In a systematic review of the four most-used equations, Mifflin-St Jeor came closest, estimating resting burn within 10% of measured values for more people than any other. Treat your number as a starting point. Eat to it for 2–3 weeks, compare your weekly average weight, and adjust by 100–200 calories if needed.

Common questions

What's the difference between TDEE and BMR?

BMR is what you burn at complete rest. TDEE is BMR plus everything else: walking, exercise and digesting food. You eat to your TDEE, not your BMR.

Which activity level should I pick?

Pick lower if you're unsure. Under 5,000 steps a day is Sedentary, 5,000–7,500 is Light. Move up a level only if you also train hard most days.

Should I eat back the calories my watch says I burned?

No. Your TDEE already counts your workouts through your activity level, so adding them again counts them twice.

How often should I recalculate?

Every 10–20 lb (5–10 kg) you lose or gain, or every 4–6 weeks. A smaller body burns less, so your target drops as you go.

More calculators

Not medical advice. These numbers are estimates for healthy adults aged 18–80, based on published equations. They aren't reviewed by a doctor or registered dietitian. Talk to one before making big changes to how you eat, especially if you're pregnant or breastfeeding, under 18, have a history of disordered eating, have a medical condition, or take medication that affects appetite or weight. Medical disclaimer

Sources

  1. Mifflin MD, St Jeor ST, et al. A new predictive equation for resting energy expenditure in healthy individuals. Am J Clin Nutr, 1990.
  2. Frankenfield D, Roth-Yousey L, Compher C. Comparison of predictive equations for resting metabolic rate in healthy nonobese and obese adults: a systematic review. J Am Diet Assoc, 2005.
  3. Hall KD, et al. Quantification of the effect of energy imbalance on bodyweight. Lancet, 2011.