Nutrition & Diet

Nutrition & Diet Calculators

13 nutrition & diet calculators in this category. Each one names the formula it uses and the guideline or study the formula came from — so you can verify the math instead of trusting a black box. Calculations run in your browser; nothing you enter is sent anywhere.

Nutrition & diet numbers are screening tools, not diagnoses. They are useful for spotting outliers and tracking changes over time, less useful for telling you what to do about a borderline result. For that, take the number to a clinician who can read it in the context of your full history.

Available Calculators

• Free Calorie Calculator - Daily Calorie Needs for Weight Loss & Gain — Calculate your daily calorie needs free. Enter age, weight, height and activity level to get personalized BMR and TDEE results. Custom goals for weight loss, maintenance or muscle gain — instant results!
• Free TDEE Calculator - Total Daily Energy Expenditure (2026) — Calculate your TDEE (Total Daily Energy Expenditure) free. Enter your stats to get BMR + activity-based calorie needs. Personalized goals for weight loss, muscle gain or maintenance using Mifflin-St Jeor equation.
• Macro Calculator - Calculate Your Macronutrients & TDEE — Calculate your daily macronutrient needs (protein, carbs, fat) and TDEE based on your goals. Get personalized nutrition targets for weight loss, maintenance, or muscle gain.
• Free BMR Calculator - Basal Metabolic Rate Calculator (2026) — Calculate your BMR (Basal Metabolic Rate) free — how many calories your body burns at rest. Get resting metabolism and daily calorie needs at every activity level using the Mifflin-St Jeor equation.
• Food Calorie Calculator - Track Nutrition & Calories | Free Tool — Calculate calories, protein, carbs, fat, and fiber for 150+ foods. Comprehensive food calorie calculator with detailed nutritional information for fruits, vegetables, meats, grains, and more. Free nutrition tracking tool.
• Water Intake Calculator - Daily Hydration Needs Calculator — Calculate your daily water intake needs based on weight, activity level, climate, and special conditions. Get personalized hydration recommendations for optimal health and performance.
• Calorie Deficit Calculator - Weight Loss Calorie Calculator — Calculate your optimal calorie deficit for safe and effective weight loss. Get personalized daily calorie targets, macros, and weight loss timeline based on your goals.
• Protein Calculator - Calculate Your Daily Protein Needs — Calculate your optimal daily protein intake based on weight, activity level, and fitness goals. Get personalized recommendations for muscle building, weight loss, or maintenance.
• Intermittent Fasting Calculator - 16:8, 18:6, OMAD & More — Free intermittent fasting calculator for 16:8, 18:6, 20:4, OMAD, and 5:2 protocols. Calculate your eating window, meal timing, and autophagy benefits.
• Keto Calculator - Ketogenic Diet Macro Calculator — Calculate your personalized keto diet macros. Get exact fat, protein, and carb targets for ketosis with meal plans and food guides.
• Weight Loss Calculator - How Long to Reach Your Goal? — Calculate how long it will take to reach your target weight. Get a personalized weight loss timeline with weekly milestones, calorie targets, and estimated completion date.
• Weight Gain Calculator - Plan Your Healthy Weight Gain — Calculate how long it will take to reach your target weight with a healthy weight gain plan. Get personalized calorie surplus, macro targets, and weekly milestones.
• Daily Sugar Intake Calculator - How Much Sugar Should You Eat? — Calculate your recommended daily sugar intake based on WHO and AHA guidelines. Get personalized limits based on age, gender, activity level, and health conditions. See how much sugar is in common foods and learn to reduce hidden sugar intake.