Our nutrition calculators use peer-reviewed formulas to give you the most accurate dietary targets possible. The Mifflin-St Jeor equation for calorie calculations is widely considered the gold standard, validated in multiple clinical studies. Our protein recommendations align with guidelines from the International Society of Sports Nutrition (ISSN).

Start with the Calorie Calculator to establish your energy needs, then use the Macro Calculator to set your macronutrient targets, and fine-tune with the Protein Intake Calculator to ensure you're meeting your protein goals for muscle preservation or growth.