How to Read Nutrition Labels: A Line-by-Line Guide to the Nutrition Facts Panel
8 min read
The Nutrition Facts panel on a US food package follows a fixed format, so once you know how to read one, you can read them all. This guide walks through each line in order, explains what the numbers mean and what they leave out, and finishes with a worked example using a typical box of granola. It covers the current label design that the FDA introduced in 2016 and that has been required on packaged foods since the early 2020s.
What changed in the 2016 label redesign
In 2016 the FDA finalized an updated Nutrition Facts label, the first major overhaul since the label became mandatory in the 1990s. Larger manufacturers had to switch by January 2020 and smaller ones by January 2021, so nearly every package you pick up today uses the new format.
The visible changes are easy to spot: calories and servings per container are printed in larger, bolder type, and there is a new line for added sugars. Less visibly, many serving sizes were updated to reflect how much people actually eat, the Calories from Fat line was removed, and the required vitamins and minerals changed from vitamins A and C to vitamin D and potassium, alongside calcium and iron.
The Daily Values used to calculate percentages were also updated to match newer dietary guidance.
Start with serving size and servings per container
Every number on the panel is per serving, so the serving size is the line that controls all the others. It is shown in a household measure, such as 1 cup or 2 slices, followed by the metric weight in grams.
Serving sizes are set by FDA reference amounts based on how much people typically eat at one time, not on how much they should eat. The 2016 update raised several of them; for example, a serving of ice cream went from 1/2 cup to 2/3 cup, and a serving of soda went from 8 to 12 fluid ounces.
Next, check servings per container. A bag of chips that lists 140 calories per serving but holds about 3 servings contains roughly 420 calories in total. Some packages that could reasonably be eaten in one or several sittings use a dual-column label showing both per serving and per package, which saves you the math.
Calories and the macronutrients
Calories tell you how much energy one serving provides. Whether a number is high or low depends on your own needs and on how the food fits into the rest of your day, which is covered in our guide to how many calories you should eat.
Below calories come the macronutrients. Total fat is broken into saturated fat and trans fat. A product can list 0 g of trans fat if it contains less than 0.5 g per serving, so the line can read zero even when a small amount is present. Cholesterol and sodium follow in milligrams.
Total carbohydrate includes starch, fiber and sugars. Dietary fiber and total sugars are listed underneath it, and added sugars are indented under total sugars. Protein comes last among the macronutrients. Protein usually has no %DV listed, because one is required only when the package makes a protein claim or the food is meant for young children.
How to use % Daily Value
The % Daily Value column shows how much one serving contributes toward a reference amount for a 2,000-calorie diet. Current FDA Daily Values include 78 g of total fat, 20 g of saturated fat, 2,300 mg of sodium, 275 g of total carbohydrate, 28 g of dietary fiber, 50 g of added sugars and 50 g of protein.
The quickest rule of thumb is that 5% DV or less per serving is low and 20% DV or more is high. Use it in the direction that matters for each nutrient: you generally want saturated fat, sodium and added sugars toward the low end, and fiber, vitamin D, calcium, iron and potassium toward the high end.
The percentages are a comparison tool, not a personal target. If you eat more or fewer than 2,000 calories a day, your own reference amounts will differ, but the 5% and 20% markers still work for comparing two products side by side.
Total sugars vs added sugars
Total sugars include sugars that occur naturally in foods, such as lactose in milk and fructose in fruit, plus any sugars added during processing. Added sugars covers sugar, syrups, honey and concentrated fruit or vegetable juice added to the product.
This distinction is why plain yogurt and sweetened yogurt can show similar total sugars but very different added sugars. Total sugars has no %DV, but added sugars does, based on 50 g per day. A drink with 25 g of added sugars uses half of that in one serving.
If you are trying to cut back, the added sugars line is the more useful of the two. Then confirm what the sugar is by checking the ingredient list, where it may appear under names like cane sugar, corn syrup, dextrose or fruit juice concentrate.
Worked example: reading a granola label
Here is a typical granola label. Serving size 2/3 cup (55 g), about 6 servings per container. Calories 240. Total fat 9 g (12% DV), saturated fat 1.5 g (8%), trans fat 0 g. Cholesterol 0 mg (0%). Sodium 115 mg (5%). Total carbohydrate 36 g (13%), dietary fiber 4 g (14%), total sugars 13 g, including 10 g added sugars (20%). Protein 6 g.
Read it from the top. Two-thirds of a cup is smaller than most people pour, so measure once to see what it looks like in your bowl. If you actually eat 1 cup, that is 1.5 servings: 360 calories, 15 g of added sugars and 6 g of fiber. Multiply every line by 1.5, including the percentages, so added sugars becomes 30% DV.
Now apply the 5% and 20% rule. Sodium at 5% is low. Saturated fat at 8% is moderate. Fiber at 14% is a reasonable contribution. Added sugars at 20% per labeled serving is high, which is the main thing this label tells you. The percentages check out against the Daily Values: 10 g of 50 g is 20%, and 115 mg of 2,300 mg is 5%.
Finally, look at the ingredients. If rolled oats come first and sugar or syrup appears second or third, most of that 10 g of added sugar comes from sweeteners rather than dried fruit. Comparing this with another granola that lists 4 g of added sugars per serving makes the choice clearer than the calorie line alone.
Vitamins, minerals and the footnote
The bottom of the panel lists vitamin D, calcium, iron and potassium, each in an actual amount (micrograms or milligrams) as well as a %DV. Other vitamins and minerals appear only if they are added to the food or the package makes a claim about them.
The footnote underneath explains that %DV is based on a 2,000-calorie diet. It is identical on every label.
Read the ingredient list next to the panel
The Nutrition Facts panel tells you how much; the ingredient list tells you what. Ingredients are listed in descending order by weight, so the first few make up most of the product. A cracker that lists enriched flour first and whole wheat flour fourth is mostly refined flour, whatever the front of the box suggests.
Allergens are declared either within the ingredient list or in a Contains statement directly after it. If you have a food allergy, always read the physical label on the package in front of you, since recipes and labels can change and apps or websites may lag behind. Our guide to checking food ingredients covers additives and allergens in more detail.
Common mistakes to avoid
The most common mistake is reading only the calorie line and ignoring the serving size. The second is treating front-of-package claims such as made with whole grains or lightly sweetened as a summary of the panel. Those claims are marketing; the Nutrition Facts panel and ingredient list are what you should compare.
Also remember that rounding rules apply. Values are rounded to set increments, so small differences between two products, such as 5 calories or 1 g of sugar, are not meaningful. Focus on clear differences in added sugars, sodium, saturated fat and fiber. If you scan products with the Goby AI app, use it as a starting point and still check the printed label for anything that matters to your health.