TDEE Calculator

What TDEE means and how to use the number

TDEE stands for Total Daily Energy Expenditure, the estimated number of calories your body burns across a full day. It includes your resting metabolism, everyday movement, exercise, and the energy your body spends digesting food. In practical terms, TDEE is your estimated maintenance number. Eating close to it tends to keep weight steady, eating below it tends to support weight loss, and eating above it tends to support weight gain.

None of this is exact. TDEE is a planning estimate built from formulas and activity multipliers, not a measurement taken in a lab. It is still a useful starting point, and adjusting from that starting point based on how your weight actually responds over a few weeks tends to work better than chasing a perfectly precise number from the start.

How this calculator estimates BMR and applies activity

Reading your goal calories, macros, and calorie cycling option

Once TDEE is calculated, your chosen goal shifts that number up or down. Mild and standard weight loss subtract a moderate deficit, faster weight loss subtracts more, and the two gain options add a surplus of different sizes. A custom adjustment lets you enter your own number directly if none of the presets fit.

The macro estimate splits your goal calories into protein, carbs, and fat based on your chosen macro style. If muscle gain or preserving muscle during a deficit is the priority, it is worth checking that protein target against a dedicated calculation. Our protein intake calculator works from your weight, goal, and activity level directly, which is a useful cross check against the simpler percentage based split used here.

Using BMI, lean body mass, and water estimates alongside TDEE

Alongside TDEE, this calculator reports BMI, an approximate lean body mass when body fat percentage is provided, and a simple water estimate based on body weight. These numbers are meant as quick context rather than deep analysis, so if BMI is the main thing you are interested in, our BMI calculator goes further, with a healthy weight range and category breakdown beyond the single figure shown here.

The same applies to hydration. The water estimate here is a simple starting point based on body weight alone, while our water intake calculator factors in activity level, climate, and caffeine intake for a more complete daily target.

Practical guidance for weight loss and muscle gain goals

For weight loss, a smaller, sustainable deficit is usually easier to stick with than an aggressive one, even though the aggressive option produces faster results on paper. Track body weight, energy levels, workout performance, and hunger over two to four weeks, then adjust calories if progress feels too slow or too fast for what you are trying to achieve.

For muscle gain, a calorie surplus paired with consistent progressive strength training tends to outperform either one on its own. The lean gain target here uses a smaller surplus aimed at limiting extra fat gain, while the standard weight gain target uses a larger surplus that can suit very active people who find it hard to eat enough calories in a normal eating pattern.