AIFitLog Tools

TDEE Calculator
Know your daily calorie target

Enter your height, weight, age, and activity level to calculate your TDEE.
Get target calories for cutting, bulking, or maintaining — free, no signup.

Your Stats
cm
kg
yr
TDEE
kcal

Mifflin-St Jeor · BMR × activity factor

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Available in English and Japanese

About this calculator

TDEE (Total Daily Energy Expenditure) is the total number of calories you burn in a day, combining your basal metabolic rate (BMR) with your activity level. It's the starting point for any nutrition plan, whether you're cutting, bulking, or maintaining.

This calculator uses the Mifflin-St Jeor formula, currently considered one of the most accurate methods for estimating BMR. It accounts for sex, height, weight, and age.

How the goal targets are calculated: The cut target uses TDEE × 80% (−20%), which scales proportionally to body size and corresponds to roughly 0.3–0.5 kg of weight loss per week. The bulk target uses TDEE × 115% (+15%), a common guideline for lean bulking — enough of a surplus to support muscle growth while limiting fat gain.

TDEE FAQ
What is the difference between TDEE and BMR?
BMR is the energy your body uses at complete rest. TDEE starts with BMR and then adds daily movement, training, and general activity.
How much should I reduce calories for fat loss?
A moderate deficit is usually easier to maintain than an aggressive cut. This page shows 20% below estimated TDEE as a practical starting point, but real progress should be adjusted based on your body weight trend and recovery.
Why is TDEE only an estimate?
Formulas cannot measure your exact daily movement, NEAT, training volume, digestion, or metabolism. Use the result as a starting estimate, then update intake based on real-world changes over 2 to 3 weeks.
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