Your Body Transformation Starts Here
Tell us your goal and body stats. In about 30 seconds, get an estimated daily calorie and macro plan to use as a starting point.
CalXd uses the Mifflin-St Jeor equation to estimate your Basal Metabolic Rate (BMR), then adjusts for activity to find your Total Daily Energy Expenditure (TDEE). Your goal — cutting (deficit), bulking (surplus), or maintenance — determines the final calorie target. Protein recommendations follow the ISSN 2017 position stand of 1.6–2.2 g per kg of body weight. ISSN 2017 Position Stand
CalXd turns this into a daily system: log meals by photo, voice, text, or barcode and keep the plan moving.
Download on the App StoreYour BMR is estimated using the Mifflin-St Jeor equation based on weight, height, age, and sex. It is multiplied by an activity factor to get TDEE. A deficit of 300–500 kcal is applied for fat loss, a surplus of 200–400 kcal for muscle gain.
Total Daily Energy Expenditure is the total number of calories your body burns in a day, including basal metabolism, physical activity, and the thermic effect of food. CalXd uses it as the starting point for your personalized plan.
The International Society of Sports Nutrition (ISSN) recommends 1.6–2.2 g of protein per kg of body weight for active individuals. Higher intake during a calorie deficit helps preserve muscle mass.
Updated: 2026-07-14