Who We Are
TDEE Calculator 2026 is a free online tool built to help people understand their daily calorie needs using scientifically validated formulas. We believe that knowing your numbers is the first step toward any meaningful health or fitness goal — whether that's losing fat, gaining muscle, or simply maintaining a healthy weight.
Our calculator combines 7 different body composition tools in one place, making it the most comprehensive free TDEE resource available online.
What We Offer
TDEE Calculator
Your total daily calorie burn including activity
BMI Calculator
Body Mass Index with visual scale
BMR Calculator
3 formulas including Katch-McArdle
Body Fat %
U.S. Navy Method — waist & neck
Ideal Weight
4 formulas: Devine, Robinson, Miller, Hamwi
Lean Body Mass
Your weight minus fat tissue
Our Approach
Every calculation on this site is based on peer-reviewed formulas used in clinical and research settings:
- Mifflin-St Jeor — the most accurate BMR formula for healthy adults
- Harris-Benedict (Revised) — the original formula, updated in 1984
- Katch-McArdle — most accurate for lean individuals who know their body fat %
- U.S. Navy Body Fat Method — circumference-based body fat estimation
- Devine, Robinson, Miller, Hamwi — four Ideal Body Weight formulas
💡 Note: All calculators provide estimates. Individual results vary. For personalised dietary advice, consult a registered dietitian or healthcare professional.
Why Free?
We believe that access to accurate nutrition information should not be behind a paywall. Understanding your calorie needs is foundational to any health goal, and everyone deserves access to reliable tools regardless of budget.
TDEE Calculator is and will always be completely free to use.