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BMI CalculatorCheck body mass index and category.Calorie CalculatorCalculate calories, macros, and diet plan.Ideal Weight CalculatorEstimate ideal weight and healthy range.Daily Hydration CalculatorEstimate water intake by weight and activity.Keto CalculatorEstimate keto calories and macros.Macro CalculatorSplit calories into protein, carbs, and fats.IIFYM CalculatorEstimate flexible dieting macros.Micronutrient CalculatorEstimate daily vitamin and mineral targets.Vitamin CalculatorEstimate daily vitamin targets.Meal CalculatorDivide calories and macros by meal.Recipe CalculatorCalculate nutrition per serving.Weight Watchers Points CalculatorEstimate food points from nutrition labels.Gastric Sleeve Weight Loss CalculatorEstimate post-surgery weight loss.Calories Burned by ActivityEstimate exercise calorie burn.RMR CalculatorEstimate resting metabolic rate.TDEE CalculatorEstimate total daily energy expenditure.EER CalculatorEstimate daily energy requirement.Weight Goal CalculatorPlan your target weight timeline.Hip-to-Waist Ratio CalculatorCalculate HWR, WHR, and body-shape category.Pregnancy CalculatorEstimate due date, week, and milestones.Baby Percentile CalculatorEstimate infant growth percentile bands.
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IIFYM Calculator
Estimate flexible dieting calories and macros using body details, activity level, goal, and macro preference.
Precision plan preview
Enter your details to see the result panel, saved progress for logged-in users, and personalized nutrition guidance.
IIFYM Calculator - If It Fits Your Macros
IIFYM calculator targets from ShedBody help you plan flexible dieting without losing structure. Estimate calories, protein, carbs, and fats for fat loss, maintenance, or muscle gain.
Flexible dieting calorie target
Protein, carbs, and fat grams
Fat loss, maintenance, and muscle gain goals
Balanced, high-protein, higher-carb, and lower-carb macro styles
How the IIFYM Calculator Works
The calculator estimates maintenance calories from body details and activity, applies your goal, then splits calories into flexible protein, carb, and fat targets based on your preferred macro style.
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Use the complete calculator archive for body metrics, nutrition planning, hydration, pregnancy, baby growth, and exercise burn.
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