Daily Value (%DV) Calculator
Instantly calculate the percent Daily Value for any nutrient on your FDA Supplement Facts label. Based on official FDA 21 CFR 101.9 Reference Daily Intake (RDI) values for adults and children 4+ years.
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How is Daily Value (%DV) calculated?
On an FDA Supplement Facts panel, the percent Daily Value (%DV) tells consumers how much a nutrient in one serving contributes to a daily diet. It is computed as: (amount per serving ÷ Reference Daily Intake) × 100. The calculator shows a mathematical ratio and whole-percent preview. Final label display requires the applicable nutrient and panel-specific rounding and declaration rules.
What are RDI / Daily Values?
Reference Daily Intake (RDI) values are the FDA-established daily reference amounts for essential nutrients (e.g. Vitamin C 90 mg, Calcium 1,300 mg). Under 21 CFR 101.36, these are the denominators used to derive %DV on both Nutrition Facts and Supplement Facts panels. The calculator uses adult/children 4+ reference values. Review the intended population, amount basis, any protein adjustment and the applicable food or supplement display rules before using a result on a label.
Source: FDA 21 CFR 101.9(c)(8)(iv) — Daily Reference Values and Reference Daily Intakes. See the official text at ecfr.gov — 21 CFR 101.9.
Processing a complex spec sheet?
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