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Calorie & TDEE Calculator

Your daily calorie needs, plus the part most calculators skip — where those calories actually go.

—calories a day to maintain

What makes up your daily calorie burn A stacked bar splitting your total daily energy expenditure into resting metabolism, activity, and the cost of digesting food. Resting metabolism (BMR) Movement & exercise Digesting food
Your total split into its three parts. Resting metabolism is the biggest line for almost everyone, which is why activity alone rarely shifts the total as much as people expect. Digestion is held at the standard 10% estimate.

If your goal is…

GoalDaily caloriesExpected rate

Where your calories actually go

Most people picture daily burn as mostly exercise. It is mostly just being alive. Resting metabolism — keeping your heart beating, your brain running, your body at temperature — is typically 60 to 70% of the total, and it is the part you have least direct control over.

The second-biggest share is usually not the gym either. Non-exercise movement — walking, standing, fidgeting, carrying things, taking stairs — often outweighs formal exercise for anyone not training seriously, and it is far more responsive to small daily habits than to an hour three times a week.

This is why "I worked out, so I earned it" rarely balances. A hard 45-minute session might burn 350–450 calories — real, but easily matched by a large coffee and a muffin. Exercise earns its place through strength, cardiovascular health, mood and sleep. Weight change is driven far more by what the other 23 hours look like.

Choosing your activity level honestly

This single dropdown moves the result more than everything else combined, and almost everyone picks one level too high. A useful test: "moderate — 3 to 5 days" means genuinely raising your heart rate on most of those days, not a gym membership you intend to use. If you have a desk job and train three times a week, "light" is usually closer to the truth than "moderate".

If the estimate turns out wrong, it will show up in the mirror and the scale within a month. Adjust by 100–200 calories and watch another two weeks rather than rebuilding the calculation.

A note on deficits. The targets above use moderate adjustments on purpose. Very low intakes — under roughly 1,500 calories for men or 1,200 for women — make it hard to meet nutrient needs and are worth doing only with clinical supervision. If tracking calories tends to pull your thinking in a difficult direction, it is entirely reasonable to skip it and work with a doctor or registered dietitian instead.

Questions

Why is my estimate different from another calculator?

Nearly always the activity multiplier, not the equation. Most calculators use Mifflin-St Jeor as this one does, but they label the activity levels differently — one site's "moderate" is another's "active", and that gap alone can shift the total by 300 calories. Compare the multiplier, not the brand.

How accurate is this?

Expect a 10–20% margin either way. The equation predicts resting metabolism from height, weight, age and sex, but real BMR varies with muscle mass, hormones, genetics and medication. Treat the number as a starting estimate, then adjust based on two to four weeks of actual results — your own data beats any formula.

Does exercise burn as much as my watch says?

Usually less. Wearables overestimate exercise calories substantially in independent testing, and the body partly compensates by reducing unconscious movement afterwards. Exercise is worth doing for many reasons; it is just a smaller share of daily burn than the numbers suggest.

References

  1. Mifflin MD et al. — A new predictive equation for resting energy expenditure, American Journal of Clinical Nutrition
  2. NIH — Body Weight Planner and energy balance research
  3. USDA & HHS — Dietary Guidelines for Americans, estimated calorie needs
  4. Levine JA — Non-exercise activity thermogenesis (NEAT) review

Reviewed September 2026. VitalTally calculators are informational and are not medical advice.