Daily Value Percentage Calculator
Calculate the percentage of Daily Value (%DV) for any nutrient based on the amount consumed and the FDA reference daily value. Identify when intake exceeds 100%.
Results
Visualization
How It Works
The Daily Value (DV) is a reference amount of a nutrient to consume or not exceed each day, established by the FDA for food and supplement labeling. The %DV on nutrition labels tells you how much one serving contributes to your total daily diet. A %DV of 5% or less is considered low, while 20% or more is considered high. Understanding %DV helps you compare products and ensure adequate intake without exceeding safe levels.
The Formula
Variables
- Nutrient Amount — The amount of nutrient consumed (in mg, mcg, or IU depending on the nutrient)
- FDA Daily Value — The reference intake value set by the FDA (updated in 2020 for most nutrients)
- %DV — Percentage of the daily reference value provided by the consumed amount
Worked Example
Taking a calcium supplement with 600 mg: FDA Daily Value for calcium = 1300 mg. %DV = (600 / 1300) x 100 = 46.2%. This is a good source (over 20% DV) but leaves 700 mg to obtain from food.
Practical Tips
- Use the 5%/20% rule: 5% DV or less is low, 20% DV or more is high for any nutrient per serving.
- Daily Values are based on a 2000-calorie diet for adults and children 4+ years — individual needs may differ.
- The FDA updated Daily Values in 2020 — older supplement labels may show outdated percentages.
- For nutrients to limit (sodium, saturated fat, added sugars), aim to stay well below 100% DV total for the day.
- Exceeding 100% DV for water-soluble vitamins (C, B vitamins) is generally safe as excess is excreted, but fat-soluble vitamins (A, D, E, K) can accumulate.
Frequently Asked Questions
What does %DV mean on a nutrition label?
Percent Daily Value (%DV) shows how much one serving of a food or supplement contributes toward the total recommended daily intake of that nutrient. It is based on a 2000-calorie reference diet established by the FDA for labeling purposes.
Is it dangerous to exceed 100% DV?
It depends on the nutrient. For water-soluble vitamins like C and B12, exceeding 100% DV is generally harmless. For fat-soluble vitamins (A, D, E, K) and minerals like iron and zinc, regularly exceeding the Tolerable Upper Intake Level can cause toxicity.
Why are some Daily Values different from RDA?
Daily Values are a single reference number used on labels for all adults and children 4+, while the RDA varies by age, sex, and life stage. DVs are set to cover most of the population, so they may be higher than your individual RDA.
What are common FDA Daily Values I should know?
Key DVs include: Vitamin C (90 mg), Vitamin D (20 mcg), Calcium (1300 mg), Iron (18 mg), Potassium (4700 mg), Sodium (2300 mg), Dietary Fiber (28 g), and Vitamin A (900 mcg RAE). These were updated by the FDA in 2020.
Do children have different Daily Values?
Children ages 1-3 have separate Daily Values that are lower than adult DVs. The standard %DV on most labels is based on adults and children 4+. Infant and toddler-specific products use age-appropriate reference values.