Tools
Four calculators on USDA's food data and the FDA Daily Values. Each opens on a worked example; nothing you type leaves your browser.
Data: USDA FoodData Central, April 30, 2026 release.
Daily Value calculator
Type any label, or pick a USDA food, and see each nutrient as a share of the FDA Daily Values.
Portion calculator
Any USDA food at any of its portions or a weight you type: every label nutrient for that amount.
Net carb calculator
Total carbohydrate minus fiber, from a label or a USDA food; optionally minus sugar alcohols.
Meal calculator
Add foods at their portions and see the meal against the Daily Values.
Source: USDA FoodData Central, April 30, 2026 release (foods and portions); FDA Daily Values, 21 CFR 101.9.