Nutrition Label Generator & Recipe Analyzer

Methodology

This tool generates nutrition facts labels following the FDA 2020 updated format as specified in 21 CFR 101.9. Nutrient values are sourced from the USDA FoodData Central database (CC0 public domain), which provides laboratory-analyzed composition data for thousands of foods. For each ingredient added to a recipe, the tool retrieves the nutrient profile per 100 g from the USDA database, scales it to the specified amount, and sums all ingredient contributions. The total recipe nutrition is then divided by the number of servings to produce per-serving values. Rounding follows 21 CFR 101.9 rules precisely: Calories round to the nearest 10 above 50 kcal, nearest 5 between 5-50 kcal, and may be expressed as zero below 5 kcal. Total fat, saturated fat, and trans fat round to the nearest 0.5 g below 5 g and nearest 1 g at or above 5 g. Sodium rounds to nearest 5 mg below 140 mg and nearest 10 mg at or above 140 mg. Cholesterol rounds to nearest 5 mg. Carbohydrate, fiber, and protein round to nearest 1 g. Percent Daily Values are calculated using the 2020 updated reference values and rounded to nearest 1%. The built-in search engine indexes the food database in your browser, enabling fast fuzzy search across approximately 13,500 food items with zero server dependency. All data comes from the USDA FoodData Central October 2024 release.

Understanding Your Results

The nutrition facts label shows nutrient amounts per serving and their Percent Daily Values (%DV) based on a 2,000-calorie reference diet. A %DV of 5% or less is considered low for a nutrient, while 20% or more is considered high. Use %DV to quickly compare foods and to determine whether a serving contributes a lot or a little of a particular nutrient. Calories reflect the total energy content from all macronutrients. Total Fat includes saturated fat, trans fat, monounsaturated fat, and polyunsaturated fat. Saturated and trans fats should be limited as they can raise LDL cholesterol levels. The Added Sugars line, required since 2020, helps distinguish naturally occurring sugars (like those in fruit or milk) from sugars added during processing. Sodium values are important for individuals monitoring blood pressure — the FDA recommends consuming less than 2,300 mg per day. Dietary Fiber supports digestive health, and most people do not consume enough (the Daily Value is 28 g). Vitamin D, Calcium, Iron, and Potassium were selected for mandatory listing because they are nutrients of public health significance where many Americans fall short. Remember that the generated label uses calculated values from the USDA database. For commercial products, the FDA requires laboratory analysis of the actual food to verify label accuracy within allowable tolerances.

Practical Examples

Chocolate Chip Cookies (yields 24 cookies, serving size: 1 cookie, 30 g): With ingredients totaling 2.25 cups all-purpose flour (281 g), 1 cup butter (227 g), 0.75 cup white sugar (150 g), 0.75 cup brown sugar (165 g), 2 large eggs (100 g), 2 cups chocolate chips (336 g), 1 tsp vanilla (4 g), 1 tsp baking soda (5 g), 1 tsp salt (6 g), the generated label would show approximately: Calories 210, Total Fat 10 g (13% DV), Saturated Fat 6 g (30% DV), Cholesterol 25 mg (8% DV), Sodium 170 mg (7% DV), Total Carb 28 g (10% DV), Sugars 18 g, Protein 2 g. Homemade Tomato Soup (yields 4 servings, serving size: 1 cup, 245 g): With canned crushed tomatoes (800 g), onion (150 g), olive oil (30 ml), garlic (10 g), vegetable broth (480 ml), and seasonings, the label might show approximately: Calories 120, Total Fat 5 g (6% DV), Sodium 580 mg (25% DV), Total Carb 17 g (6% DV), Dietary Fiber 4 g (14% DV), Sugars 10 g, Protein 3 g.

Tips for Accurate Nutrition Analysis & Labels

Weigh ingredients in grams for the most accurate results. Volume measurements (cups, tablespoons) introduce variability — 1 cup of flour can weigh anywhere from 120 to 150 g depending on how it is measured. Use the cooked form of ingredients when your recipe includes cooking. For example, search for "rice, white, cooked" rather than "rice, white, raw" if your recipe lists cooked rice as an ingredient. Cooking changes nutrient density due to water absorption or loss. Account for all ingredients, including small amounts of oil used for cooking, condiments, and garnishes. These can add significant calories and fat that are easy to overlook. Set realistic serving sizes based on RACC (Reference Amounts Customarily Consumed) values defined in 21 CFR 101.12. For example, the RACC for cookies is 30 g, for ice cream it is 2/3 cup (about 110 g), and for bread it is 50 g (about 1 slice). For commercial products, use this tool for preliminary estimates and recipe development. Official nutrition labeling requires laboratory analysis of the finished product to verify values within FDA compliance tolerances.

Sources

• USDA FoodData Central — Nutrient data (CC0 Public Domain)
• 21 CFR 101.9 — FDA rounding rules for nutrition labeling
• FDA Daily Values — 2020 Daily Value Reference Intakes
• FDA Nutrition Facts Label Changes — 2020 label format specifications