Protein, carb, fat macro split and IIFYM calculators. Browse our free macronutrients tools below — all calculators are instant, accurate, and require no sign-up.
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.
Net Carbs Calculator — Calculate net carbs by subtracting fiber and selected sugar-alcohol adjustments from total carbohydrates for low-carb meal planning.
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.
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.