SmartyDiet Tools
Free nutrition tools
Simple, science-based calculators you can use without signing up.
🔥Energy
BMR Calculator
Calculate your basal metabolic rate and daily calorie needs using the Mifflin-St Jeor equation.
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Mifflin-St Jeor equation
The standard for BMR estimates.
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Activity levels
Sedentary → very active.
🥧Macros
Macro Calculator
Get personalized calories, protein, carbs, fats, fiber and water targets based on your goal.
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Goal-aware
Lose, maintain, recomp or gain.
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Hydration & fiber
Complete daily targets.
🍎Lookup
Calorie Counter
Look up calories and macros for common foods and calculate totals for any portion size.
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USDA-powered
Standardized food data.
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Any portion size
Grams, ounces, servings.
Want a full plan built from your numbers? Create your Smarty Meal Plan™ →