IIFYM Calculator (If It Fits Your Macros)
Calculate flexible macro targets from an estimated TDEE, with adjustable protein, fat, and carbohydrate ranges for different goals.
Free Macronutrients Calculators
4 toolsProtein, carb, fat macro split and IIFYM calculators. Browse our free macronutrients tools below — no sign-up required.
Macro Calculator (Protein/Carb/Fat Split)
Calculate your daily macronutrient targets in grams. Choose from preset macro splits or customize your protein, carb, and fat percentages.
Net Carbs Calculator
Calculate net carbs by subtracting fiber and selected sugar-alcohol adjustments from total carbohydrates for low-carb meal planning.
Protein Intake Calculator
Calculate how many grams of protein you need per day based on body weight, activity level, and fitness goals. ISSN-backed recommendations.