Percent Daily Value (%DV) shows how much a nutrient in a selected amount contributes to the FDA Daily Value used for nutrition labeling. It is a comparison reference—not a personalized prescription.
Daily Value and Percent Daily Value are different
The Daily Value is the reference amount for a nutrient. Percent Daily Value expresses the measured nutrient amount as a percentage of that reference. If the Daily Value for a nutrient is 300 micrograms and one serving provides 30 micrograms, that serving provides 10% DV.
%DV = nutrient amount in the selected serving ÷ Daily Value × 100
Foodmanac uses current adult FDA Daily Values for compatible measured nutrients. When you change a food from 100 g to another amount, both the nutrient amount and its calculated %DV change together.
What counts as low or high?
The FDA provides a simple general guide for interpreting the number:
- 5% DV or less per serving is considered low.
- 20% DV or more per serving is considered high.
- Values between those points make a smaller or moderate contribution, depending on the amount.
Foodmanac uses “high in” only when the selected amount reaches at least 20% DV. Below that threshold, the site uses neutral wording such as “contributes.” This keeps the description tied to the measured value instead of exaggerating the food’s contribution.
Why the selected amount matters
%DV belongs to an amount, not just to a food name. A larger portion normally produces a larger %DV because it contains more of the measured nutrient. This does not mean the food itself has changed; only the quantity has changed.
| If the amount changes | What happens? |
|---|---|
| 100 g to 50 g | Measured amounts and %DV are approximately halved. |
| 100 g to 150 g | Measured amounts and %DV are multiplied by 1.5. |
| One serving to two servings | Measured amounts and %DV are approximately doubled. |
Why some nutrients show a dash
A dash can have more than one meaning. A nutrient may not have an established Daily Value for the way it is displayed, its unit may not be compatible with the calculation, or the source record may not contain a measured value. A dash should not automatically be read as zero.
Total sugars are a useful example: the FDA label does not establish a Daily Value for total sugars, although added sugars have a Daily Value. Foodmanac keeps the measured amount visible even when a meaningful %DV cannot be calculated.
How to use %DV for comparisons
- Choose the nutrient you want to compare.
- Make the food amounts or serving sizes equal.
- Confirm that both values are measured and use compatible units.
- Compare the %DV and the actual amount together.
- Check the food preparation and source before drawing a conclusion.
Use Compare Foods for a side-by-side view or open Nutrient Finder to explore foods by a measured nutrient. The complete nutrient table remains important because a single percentage cannot describe the whole food.