Reading a nutrition label comes down to three things: check the serving size first, use the Percent Daily Value (%DV) to see if a nutrient is high or low, and scan the ingredient list for added sugars and sodium hiding under different names. Once you know these three steps, the label stops feeling like a puzzle and starts working as a quick decision tool.
This guide walks through each part of the label using the U.S. Food and Drug Administration’s official label-reading guidance, plus a few simple tools to help you build the habit.
Step 1: Start with the serving size, not the whole package
Every number on the label, including the calorie count, is based on one serving. The serving size is listed near the top in a familiar unit, like cups or pieces, along with the metric amount in grams. It reflects how much people typically eat, not a suggestion for how much you should eat.
Before you look at anything else, check how many servings are in the package. If a snack bag has 2.5 servings and you eat the whole bag, you are eating two and a half times the calories, fat, sugar, and every other nutrient listed on the label.
Some larger packages use a dual-column label instead. This shows the nutrition information “per serving” in one column and “per package” in a second column, so you can see both numbers side by side without doing the math yourself.
Quick serving size math
- Find the serving size and servings per container at the top of the label.
- Decide how much you actually plan to eat compared to one serving.
- Multiply every number on the label by that amount. Eating two servings means doubling the calories, fat, sodium, sugar, and %DV.
- If the package uses dual-column labeling, just read the “per package” column instead of doing the math.
Step 2: Use the Percent Daily Value to judge a nutrient in seconds
The %DV tells you how much one serving of a food contributes to a full day’s needs, based on a standard 2,000-calorie diet used as a general reference. You do not need to calculate anything yourself. The label does the math for you. You just need to know how to read the result.
The FDA’s general rule is simple: 5% DV or less per serving is considered low, and 20% DV or more per serving is considered high. This scale applies the same way to every nutrient, so you can use it to compare two products in seconds, as long as you are comparing similar serving sizes.
Nutrients to aim for less of (lower %DV is better)
- Saturated fat
- Sodium
- Added sugars
Nutrients to aim for more of (higher %DV is better)
- Dietary fiber
- Vitamin D
- Calcium
- Iron
- Potassium
Two nutrients on the label do not get a %DV at all: trans fat and total sugars. There is no established daily limit for either one, so the label lists the grams but leaves the percentage blank. Protein only shows a %DV in specific cases, such as when a product makes a protein claim or is meant for infants and children under four.
Step 3: Spot hidden sugar and sodium in the ingredient list
The “Total Sugars” line includes sugar that occurs naturally in things like milk and fruit, plus any sugar the manufacturer added. “Added Sugars” is a separate line underneath that shows only what was added during processing, such as sucrose, honey, syrups, or concentrated fruit juice. If you see the word “includes” before Added Sugars, that means the added sugar total is already part of the Total Sugars number above it, not extra on top.
Added sugars and sodium are also easy to underestimate because they show up under many different ingredient names. When you check the ingredient list, remember that ingredients are listed from most to least by weight, so anything sugar-related near the top of the list usually means the product has a meaningful amount.
Checklist for spotting hidden ingredients
- Check the Added Sugars line, not just Total Sugars, since Total Sugars can look low even when a lot of it was added.
- Scan the first few ingredients on the list. Anything ending in “-ose” (like dextrose or maltose) is a form of added sugar.
- Compare sodium %DV across similar products. Two products with the same serving size can differ a lot in sodium content.
- Be cautious with marketing words like “light,” “low,” or “reduced.” Compare the actual %DV numbers between products instead of relying on the front-of-package claim.
- For packaged honey, maple syrup, or plain sugar, added sugar grams are not required to be listed, but the %DV for added sugars still is.
Worked example: comparing two servings
Say a label lists one serving as 1 cup with 280 calories and 37% DV for sodium. That 37% already tells you this is a high-sodium food, since it’s well above the 20% DV cutoff. If you eat two cups, you are now at 560 calories and about 74% DV for sodium, which is close to your entire day’s recommended limit from one meal.
This is exactly why serving size and %DV work together. The %DV means little if you skip the serving size, and the serving size means little if you don’t check what percentage of your day it represents.
Using MyPlate alongside the label
The Nutrition Facts label tells you what is in a specific packaged food. USDA’s MyPlate is a separate tool that shows the bigger picture: how to build a balanced plate across food groups like fruits, vegetables, grains, protein, and dairy. Using both together gives you a fuller picture than either one alone. The label helps you compare products on the shelf, while MyPlate helps you think about your overall eating pattern for the day.
Extra caution for certain readers
Anyone managing a condition affected by sodium, sugar, or specific nutrients, such as high blood pressure or blood sugar management, should talk with a doctor or registered dietitian about how to apply %DV limits to their specific needs. General %DV guidance is built around a standard 2,000-calorie diet, and your own needs may be higher or lower depending on your age, sex, size, and activity level. A qualified clinician can help you set numbers that are right for you.
Frequently asked questions
Is the %DV based on my personal calorie needs?
No. The %DV on every label is calculated using a standard 2,000-calorie diet, which is used as a general reference point. Your own calorie needs may be higher or lower depending on your age, sex, height, weight, and activity level.
What counts as a high-sodium or high-sugar food?
Using the FDA’s general %DV guide, 20% DV or more per serving is considered high for any nutrient, including sodium and added sugars. 5% DV or less is considered low.
Why doesn’t trans fat have a %DV?
There isn’t an established Daily Value for trans fat, so the label lists the grams but leaves the percentage column blank. The same is true for total sugars, since no daily recommendation has been set for total sugar intake.
Does a product need to list added sugars separately from total sugars?
Yes, for most packaged foods. Added Sugars appears as its own line under Total Sugars, showing only the sugar added during processing rather than sugar that occurs naturally in the food.
Related reading
- Simple Ways to Cut Back on Added Sugar Without Feeling Deprived
- How to Read an Electrolyte and Hydration Label
- How to Build a Balanced Plate Without Counting a Single Calorie
- The Beginner’s Guide to Meal Prep: Save Time and Eat Better
Sources
This article is for general wellness education and is not medical or dietary advice. It is not a substitute for guidance from a doctor, registered dietitian, or other qualified healthcare provider, especially if you are managing a health condition that requires specific nutrient limits.