Interactive tool · USDA portion lookup

Food Calorie Calculator

Search a food, enter the portion you actually plan to eat, and scale its USDA calories and macros from the standard 100-gram basis.

100 g
Source basis
Live
Food lookup

This calculator multiplies a selected USDA FoodData Central record's per-100-gram calories and nutrients by your portion weight. Search for a food, choose the matching record, and enter grams to see calories plus protein, carbohydrate, fat, and fiber. Values are a data lookup, not personalized dietary advice.

Search and choose a USDA food to begin.

Calories in your portion-

Choose a food to calculate a portion.

Protein
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Carbohydrate
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Fat
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Fiber
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How the portion calculation works

USDA FoodData Central standardizes food composition to 100 grams, which makes records comparable even when package serving sizes differ. This tool keeps that source basis intact: a 150-gram portion multiplies each available per-100-gram value by 1.5. It does not substitute missing nutrients or infer a serving from a name.

Branded foods and whole foods can describe portions differently, and labels can change. The result links back to the selected GetFoodFacts record so you can check its full USDA-sourced label, source type, and any serving information before relying on it.

This is an informational tool using the April 2026 release, not medical or dietary advice. For nutrition changes related to a health condition, medication, or eating disorder, consult a qualified clinician or registered dietitian.

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Key takeaways

  • The calculation starts with the selected USDA record, then scales every displayed value from its per-100 g basis. It does not guess a household serving size. Read the methodology
  • A result is a label-data lookup, not a meal plan or a personal nutrition recommendation. Food portions and dietary needs vary. Compare foods side by side

Data provenance

How this page is sourced

Every figure on GetFoodFacts is rendered directly from official USDA FoodData Central records, no number is typed in by an editor. Read our editorial standards and corrections policy, the methodology behind these numbers, or report a data error. Data current as of April 2026.