Calorie & Nutrition Lookup
Search USDA-sourced nutrition data for common foods. Compare macros, micronutrients, and see how foods fit your daily calorie and macro goals.
Understanding Calories and Nutrition Labels
A calorie is a unit of energy. Specifically, one dietary Calorie (kcal) is the amount of energy needed to raise the temperature of one kilogram of water by one degree Celsius. Your body needs calories from food to fuel every process — from breathing and circulating blood to exercising and thinking. The three macronutrients provide different amounts of energy: protein and carbohydrates each supply 4 calories per gram, while fat provides 9 calories per gram.
Nutrition labels standardize how food manufacturers communicate what is in their products. The FDA-mandated Nutrition Facts panel lists serving size, calories, macronutrients (fat, carbohydrates, protein), and key micronutrients. Learning to read these labels empowers you to make informed dietary choices, compare products, and align your eating with your health goals.
Macronutrients: The Big Three
Protein is essential for building and repairing muscle, producing enzymes and hormones, and supporting immune function. Complete protein sources like meat, fish, eggs, and dairy provide all nine essential amino acids. Plant sources like beans, lentils, and tofu can be combined to achieve a complete amino acid profile.
Carbohydrates are your body's preferred energy source, particularly for high-intensity activity and brain function. Complex carbs (whole grains, vegetables, legumes) provide sustained energy along with fiber, while simple carbs (sugar, refined grains) are digested quickly. Fiber, a type of carbohydrate your body cannot digest, is critical for digestive health, blood sugar regulation, and satiety.
Fat is vital for hormone production, cell membrane integrity, absorption of fat-soluble vitamins (A, D, E, K), and brain health. Unsaturated fats (olive oil, nuts, avocado, fatty fish) are associated with cardiovascular benefits, while excessive saturated and trans fats are linked to increased disease risk.
Micronutrients: Small but Mighty
Vitamins and minerals are needed in trace amounts but play outsized roles. Calcium builds bones and teeth and enables muscle contraction. Iron carries oxygen in your blood. Potassium regulates fluid balance and blood pressure. Vitamin A supports vision and immune function. Vitamin C is a powerful antioxidant that aids collagen synthesis and iron absorption. Vitamin D is essential for calcium absorption and bone health — yet deficiency affects an estimated 42% of American adults.
Using This Lookup Tool
Search for any food to see its complete nutrient profile per 100 grams, then adjust the serving size to match what you actually eat. Select up to three foods to compare side by side. If you are logged in with calorie and macro targets set in your Sathi.fit profile, you will see how each food fits into your daily goals — making meal planning intuitive and data-driven.
Calorie & Nutrition Lookup
Search foods, view detailed nutrition facts, and compare up to 3 side by side.
Disclaimer: Nutrition data is sourced from the USDA FoodData Central database and represents average values. Actual nutrient content may vary based on variety, growing conditions, preparation method, and brand. This tool is for educational and planning purposes only and does not constitute medical or dietary advice. Consult a registered dietitian or healthcare provider for personalized nutrition guidance.
Methodology
Data Source: USDA FoodData Central
All nutrient values in this tool are sourced from the USDA FoodData Central database (fdc.nal.usda.gov), maintained by the U.S. Department of Agriculture's Agricultural Research Service. We use the SR Legacy and Foundation Foods datasets, which contain laboratory-analyzed nutrient profiles for thousands of common foods.
Per-100g Standardization
To enable fair comparisons across different foods, all values are stored and displayed on a per-100-gram basis. This is the international standard used by USDA, EFSA, and most national food composition databases. When you adjust the serving size, values are proportionally scaled from this 100g reference.
Percent Daily Values
% Daily Values are calculated using the FDA's Reference Daily Intakes (RDIs) based on a 2,000-calorie diet: Protein 50g, Total Carbohydrate 275g, Total Fat 78g, Dietary Fiber 28g, Sodium 2,300mg, Potassium 4,700mg, Calcium 1,300mg, Iron 18mg, Vitamin A 900mcg RAE, Vitamin C 90mg, Vitamin D 20mcg. These reference values were updated by the FDA in 2016 and are the same values that appear on all US Nutrition Facts labels.
Typical Serving Sizes
Household serving sizes (e.g., "1 medium banana", "1 cup cooked") are based on USDA Reference Amounts Customarily Consumed (RACCs) and common household measures. These provide a practical starting point, though individual portions may vary. For maximum accuracy, we recommend using a kitchen scale.
Limitations
Nutrient content of natural foods varies based on variety, growing conditions, season, ripeness, and preparation method. Cooked values may differ from raw values due to water loss and nutrient degradation. Branded and restaurant foods may differ significantly from generic USDA entries. This tool is intended for educational and planning purposes and should not replace guidance from a registered dietitian or healthcare provider.
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Frequently Asked Questions
How accurate is the nutrition data in this tool?
All nutrition data is sourced from the USDA FoodData Central database, the gold standard for food composition data in the United States. Values are based on laboratory analyses of representative food samples. Keep in mind that natural foods vary slightly in nutrient content depending on growing conditions, variety, and preparation method.
What is the USDA FoodData Central database?
USDA FoodData Central is the U.S. Department of Agriculture's comprehensive food composition database. It contains detailed nutrient profiles for thousands of foods, including both raw ingredients and branded products. The data is compiled from laboratory analyses, industry submissions, and scientific literature, making it the most authoritative source for nutrition information in the US.
What is the difference between macronutrients and micronutrients?
Macronutrients — protein, carbohydrates, and fat — are nutrients your body needs in large amounts (grams) for energy, growth, and cellular function. Micronutrients — vitamins and minerals like iron, calcium, and vitamins A, C, and D — are needed in much smaller amounts (milligrams or micrograms) but are equally essential for immune function, bone health, energy metabolism, and hundreds of other biological processes.
How do I interpret the serving sizes shown?
Each food shows two reference points: the per-100g standardized value (used for fair comparison across foods) and a typical household serving size (e.g., '1 medium apple' or '1 cup cooked rice'). You can adjust the serving multiplier to see nutrition data for the amount you actually eat. The per-100g basis lets you compare any two foods on equal footing.
Can I compare multiple foods side by side?
Yes, select up to 3 foods to see a detailed side-by-side comparison table. The comparison highlights which food has the highest or lowest value for each nutrient, helping you make informed choices — for example, comparing chicken breast vs. salmon for protein density, or broccoli vs. kale for vitamin C content.
What are % Daily Values and how are they calculated?
Percent Daily Values (% DV) tell you how much a nutrient in one serving contributes to a 2,000-calorie daily diet. For example, if a food has 18mg of iron per serving, that is 100% DV since the reference intake is 18mg. These values are set by the FDA and appear on all US nutrition labels. They provide a quick way to gauge whether a food is high or low in a specific nutrient.
What are some practical calorie counting tips?
Focus on whole, minimally processed foods which are naturally more nutrient-dense per calorie. Weigh portions with a kitchen scale for accuracy rather than estimating. Pay attention to calorie-dense foods like nuts, oils, and cheese — small amounts add up quickly. Track fiber and protein intake alongside calories, as both promote satiety. And remember that calorie labels have a legal margin of error of up to 20%.
Are whole foods always healthier than processed foods?
Whole foods tend to be more nutrient-dense, meaning they provide more vitamins, minerals, and fiber per calorie compared to ultra-processed foods. However, not all processing is bad — canned beans, frozen vegetables, and pasteurized milk are all processed yet highly nutritious. The key distinction is 'ultra-processed' foods (high in added sugar, refined oils, and additives) versus minimally processed whole foods. Focus on overall dietary patterns rather than demonizing individual foods.
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