How to Read a Nutrition Facts Label and Compare Packaged Foods

A guide to Starting With the Package and Serving Information, Reading Calories and Nutrients in Context, Using % Daily Value and Ingredient Information, Comparing Two Products Fairly, Making and Recording the Choice

Written by Laura Bennett, Food Literacy & Nutrition Communication Editor

Last updated: November 6, 2026 Sources listed

Download checklist (PDF)

Interactive Step Checklist0 of 23 steps completed (0%)

A Nutrition Facts panel is most useful when you compare products on the same basis and then adjust the numbers to the portion you will really consume. Use these 23 steps in our Food and Entertaining collection to read the whole package, check ingredients and allergens, and make a choice that fits your meal and individual needs rather than treating one nutrient or marketing claim as a complete health score.

How do you read a Nutrition Facts Label and Compare Packaged Foods?

Overview: How to Read a Nutrition Facts Label and Compare Packaged Foods

Howcompass | How to Read a Nutrition Facts Label and Compare Packaged Foods

Method1

Starting With the Package and Serving Information

Bearded man in dark shirt holds up two cereal boxes printed with bowls of oats, comparing them over empty bowls and measuring cups in a lamplit kitchen.

Howcompass

Collect the full labels for both packages

Choose comparable packaged foods and locate the complete label on each package. Start with products used in a similar way, such as two breakfast cereals or two soups, then find the Nutrition Facts panel, ingredient list, allergen information, and any dual-column presentation rather than judging only the front of the package. Keep both packages available throughout the comparison, because a photograph of one nutrient row or a store listing can omit the serving information needed to interpret it. Browse more packaged-food guides when you add new products to the comparison.

Oil painting: woman with shoulder-length hair in a denim shirt sits at a kitchen table holding up a printed nutrition label, notebook, mug and fruit bowl near a bright window.

Howcompass

Note the serving size and servings per container

Read the serving size and the number of servings per container before looking at calories. Record the household measure and metric weight when both are shown, and check whether the package contains one, several, or a variable number of servings. The FDA label guide places serving information first because the listed calories and nutrients usually apply to one serving, not automatically to the entire package. The raw-to-cooked gap is starkest in dried beans and whole grains.

Oil painting: hands pour grains from a metal measuring cup into a bowl on a digital scale, paper bag and glass jug on a wooden counter under warm light.

Howcompass

Decide the portion you will actually eat

Decide what portion you will actually eat or drink without treating the labeled serving as a recommendation. Measure your usual portion once with a cup, spoon, or scale if that helps you visualize it, and note whether you might consume the whole container or share it. The FDA serving and Daily Value explanation says serving size reflects the amount customarily eaten at one time, while your appropriate portion can differ according to your needs and the rest of the meal. Our small kitchen guide covers keeping cups, spoons, and a scale within reach.

Oil painting: woman in rust sweater writes on highlighted charts at a desk by arched windows overlooking a sunset courtyard, mug, highlighters and notebooks in warm light.

Howcompass

Set up a two-product comparison worksheet

Create a comparison sheet with separate columns for labeled serving, package contents, and actual portion. For each product, leave rows for calories, nutrients, ingredients, allergens, and any price or storage notes you want to consider later, and keep metric weights beside household measures so the units do not become mixed. If a label provides both per-serving and per-package columns, record which column you used instead of copying numbers from different bases into the same comparison. The same row-and-column discipline is described in our home inventory sheet.

Method2

Reading Calories and Nutrients in Context

Two weathered hands, one pressing a calculator and one holding a pencil, mark printed label sheets beside a spiral notebook and fruit bowl.

Howcompass

Scale calories to the portion you eat

Read calories per serving and scale them to your actual portion before comparing products. Multiply by the number of labeled servings you expect to consume, or use the per-package column when one is supplied, and keep the calculation visible on your worksheet. The FDA calorie and serving guidance explains that consuming two servings doubles the listed calories and nutrients; calories still need to be considered alongside portion size, nutrient content, and the overall meal rather than used as the only ranking rule. For the other side of the balance, start with a weekly walking routine.

Oil painting: sliced dark bread loaf on a wooden board with a butter dish, jar and potted herbs on a table, rooftops and church spires at sunset through the window.

Howcompass

Log the three fat rows separately

Review total fat, saturated fat, and trans fat as separate label rows with different meanings. Record the grams and any % Daily Value shown, and do not add saturated and trans fat to total fat because they are components of the total rather than extra fat to add again. Compare products on the same amount and consider your own dietary guidance; a “0” on a rounded label row should be read with the serving size and ingredient information rather than turned into permission for unlimited portions. Home pan-fried fish shows how little fat a cooked portion can add.

Grey-haired woman in striped apron whisks shredded food in a ceramic bowl at a stone kitchen table lit by low window sunset.

Howcompass

Compare sodium on one serving basis

Check sodium in milligrams and % Daily Value on the same serving basis. Copy the value for one labeled serving, calculate the amount in your actual portion when needed, and compare similar foods rather than assuming a soup, sauce, and snack should have identical sodium levels. The FDA Daily Value reference provides the reference amounts behind %DV, but individual medical or dietary limits may differ, so follow a clinician's specific instructions when you have them. Where a sodium limit has already been set, home blood pressure logging supplies the readings it protects.

A glass bowl of risen bubbly dough covered with a linen cloth sits on a flour-dusted wooden table before hazy hills at sunset.

Howcompass

Read carbohydrate, fiber, and sugar rows together

Read total carbohydrate, dietary fiber, total sugars, and added sugars together. Record fiber and added sugars separately, remembering that “Includes Added Sugars” means those grams are already part of Total Sugars and should not be added a second time. The FDA added-sugars guide explains that total sugars include naturally occurring and added sugars and has no Daily Value, while added sugars are listed in grams and %DV; use the ingredient list to understand the product rather than treating all sugar-containing foods as nutritionally identical. Baking chocolate chip cookies at home shows where added-sugar grams come from.

Woman in green top and beige apron uses tongs to fill glass containers with salads and grains along a crowded kitchen counter in soft daylight.

Howcompass

Record protein and declared micronutrients

Note protein and the listed vitamins and minerals without collapsing them into one score. Record protein in grams and the actual amounts and %DV for vitamin D, calcium, iron, potassium, and any other nutrients shown that matter to your comparison. The FDA Daily Value guide identifies required and voluntary nutrient declarations, so a missing optional row does not prove the nutrient is absent, and a fortified product should still be assessed with its ingredients, portion, and other nutrients. The same caution about absent evidence applies when you read a research paper.

Method3

Using % Daily Value and Ingredient Information

A single sheet of handwritten equations, diagrams and chemical formulae rests on a slanted wooden desk beside an open window over distant mountains at dusk.

Howcompass

Interpret the daily value share per serving

Interpret % Daily Value as each nutrient's contribution to a daily reference amount. Read it per labeled serving, and do not add down the %DV column expecting a total of 100 percent because the percentages apply to different nutrients with different Daily Values. The FDA label guide describes %DV as a comparison tool for adults and children age four and older, while age-specific labels and individual dietary advice may use different reference amounts. For the reasoning habit behind that check, see how to make well-reasoned decisions.

A wall-mounted wooden sorter with multicoloured labelled compartments hangs beside an open window over sunset rooftops, a bowl of fruit on the shelf beneath.

Howcompass

Apply the five and twenty percent rule

Use the 5% and 20% Daily Value guide as a quick nutrient comparison, not an overall food grade. FDA's Daily Value guidance describes 5% DV or less per serving as low and 20% DV or more as high, which can help you compare a particular nutrient across similar portions. A high fiber value and a high sodium value have different implications, and no single threshold makes the whole product “good,” “bad,” or suitable for every person. Reading one number as a verdict rather than a grade is the skill behind scoring a questionnaire honestly.

Grey-bearded man in blue apron lifts a steaming scored loaf on a wooden peel in a stone kitchen, olive oil bottle and breads on the table at sunset.

Howcompass

Rank the nutrients you want to limit

Compare saturated fat, sodium, and added sugars when you want to limit those nutrients. Put their %DV and gram or milligram amounts side by side only after aligning the serving basis, and then check how many servings your actual portion contains. The FDA label guidance identifies these as nutrients to get less of for general dietary guidance, but your choice should also account for the food's role, overall nutrient contribution, and any personalized clinical advice. Bread is a quiet sodium source, and baking it at home puts the salt in your hands.

Woman in green dress and apron spoons cooked vegetables into glass containers on a kitchen counter, open refrigerator glowing behind her in warm light.

Howcompass

Look for extra fiber and micronutrients

Compare dietary fiber, vitamin D, calcium, iron, and potassium when you want more of those nutrients. Look for products that supply more of the relevant nutrient per comparable amount rather than simply choosing the longest vitamin list, and check whether the apparent advantage disappears when serving sizes are equalized. The FDA Daily Value reference supports choosing more of these nutrients in general, while individual requirements and fortification needs should come from a qualified health professional. A week of family dinners is where those nutrients usually arrive.

Hands hold a white packet and a yellow pouch while a magnifying glass enlarges the printed label, with notebook and pencil on the wooden table.

Howcompass

Read the ingredient list in order

Read the ingredient list in order and use it to understand what the product contains. Look at the first few ingredients, note sweeteners, oils, whole grains, allergens, or other components relevant to your choice, and avoid assuming that a longer list is automatically less nutritious. The FDA ingredient guide explains that ingredients are listed in descending order of predominance by weight, which describes formulation order rather than the exact percentage or nutritional quality of each ingredient. Homemade stock from kitchen scraps shows how short that list can be.

Method4

Comparing Two Products Fairly

16Howcompass

Verify allergen statements on each package

Check allergen declarations and the complete ingredient list before comparing other features. Read the “Contains” statement when present and ingredient names or parenthetical allergen sources, and recheck every package because formulations and manufacturing information can change. The FDA food-allergy guidance explains the permitted declaration methods, and anyone managing an allergy should follow their clinician's instructions rather than relying on a front-of-pack claim or assuming a previously tolerated product is unchanged. Keep any prescribed emergency treatment with your home first-aid kit.

Oil painting: bowl of flour on a digital scale reading 250g sits on a wooden table with a jar, sugar bowl and water pitcher, sunset village street through the window.

Howcompass

Put both products on one comparison basis

Normalize both products to the same comparison basis before deciding which numbers are lower or higher. Use equal labeled servings when they are genuinely equivalent, convert to the same metric weight when that gives a fairer comparison, and separately calculate the package or portion you will actually use. FDA's serving guidance specifically advises checking serving size when using %DV to compare products, so a smaller labeled serving should not be mistaken for a nutritional advantage. Converting to a common unit is the same move as reading an energy bill.

Woman in white blouse lowers a glass container of food into an open green lunch bag on a sunlit counter beside fruit and wrapped cutlery.

Howcompass

Weigh calories against the whole meal

Compare calories with portion weight and the food's role in the meal. Check whether one product supplies a larger portion, a different concentration, or ingredients that change how you will use it, and then calculate calories for the amount you expect to consume. Avoid declaring the lower-calorie product the automatic winner: the comparison should also include nutrients, satiety, ingredients, your energy needs, and what else the meal contains, all documented on the same worksheet. In a many-dish holiday dinner, one product matters far less than the spread.

19Howcompass

Mark the lower sodium, fat, and sugar

Compare sodium, saturated fat, and added sugars using the normalized amounts and your actual portion. Mark which product is lower for each nutrient, calculate any trade-off if you would use a different portion, and read the ingredient list when a claim such as reduced sodium or no added sugars needs context. Do not add the three values into a homemade health score; retain each row so you can prioritize according to general guidance and your individual needs. Line-by-line marking is the same technique used to reconcile a bank statement.

Two children, a woman, a bearded man and an older woman seated around a terrace table with a board game, fruit and wine at sunset.

Howcompass

Weigh the trade-offs beyond nutrient rows

Compare fiber, protein, micronutrients, and ingredient differences alongside the nutrients you want to limit. Note where one product offers a meaningful advantage per comparable amount and whether it also brings more sodium, added sugars, saturated fat, cost, or a portion difference. Choose the combination that best fits the meal rather than expecting one product to lead every row, and keep a short written reason for the trade-off so a later comparison can test whether your priorities have changed. Cost per serving is where a household budget and a label comparison meet.

Method5

Making and Recording the Choice

Frowning bearded man in dark shirt holds two identical cereal boxes while resting his chin on his hand above two empty bowls on a wooden table.

Howcompass

Test front-of-pack claims against the panel

Evaluate front-of-pack claims against the Nutrition Facts panel and ingredient list. Treat terms such as “light,” “natural,” “whole grain,” or “high protein” as prompts to inspect the relevant nutrient rows and ingredients rather than as a summary of the whole food. Check the claim's serving basis and the rest of the package before buying, because a product can legitimately highlight one feature while still having other nutrients or ingredients that matter to your decision. Checking a claim before repeating it is covered in vetting a claim online.

Open exercise book filled with red-corrected arithmetic and a graded exam sheet lie on a desk with ink bottle and spectacles, river bridges glowing at dusk.

Howcompass

Recalculate nutrients for the cooked recipe

Recalculate the nutrients for the amount used in a recipe or combined meal. Multiply by the measured servings used, add the contributions of other packaged ingredients when you need a meal estimate, and keep any homemade estimate separate from the manufacturer's tested label values. Our safe meal-prep guide can help plan portions and storage, while this worksheet should preserve the original per-serving figures so you can reproduce or adjust the calculation later.

23Howcompass

Judge price, storage, and waste too

Consider price, storage, waste, and the rest of the meal after completing the nutrition comparison. Compare cost per usable package or actual serving rather than only the shelf price, and check whether a larger package will remain safe and acceptable long enough for your household to use it. Our monthly savings guide offers budgeting support, but the least expensive or largest option is not automatically the best value if it does not meet your needs or goes unused.

An open leather journal with blank ruled pages and a fountain pen lying across it sits on a desk before rooftops burning orange at sunset.

Howcompass

File the choice with a review date

Record the selected product, portion, reason, and review date in your shopping or meal notes. Save the serving basis and any calculations that influenced the choice, then revisit the label when the package design, formulation, serving size, your health guidance, or your usual portion changes. A repeat check prevents an old worksheet from becoming a permanent assumption, and it lets you compare a new alternative without rebuilding the entire process from memory. A weekly review journal is a good place to keep that dated note.

Frequently Asked Questions

Question: Is the serving size how much I am supposed to eat?

No. FDA explains that serving size is based on the amount customarily eaten at one time; it is not a recommendation of how much to eat or drink. Use it to interpret the label, then calculate the nutrients in the portion that fits your meal and individual guidance.

Question: What is the difference between Total Sugars and Added Sugars?

Total Sugars include naturally occurring sugars, such as those in milk and fruit, plus any added sugars. “Includes Added Sugars” means the added amount is already contained within the Total Sugars grams, so the two rows must not be added together. FDA provides a Daily Value for added sugars but not for total sugars.

Question: Does 20% Daily Value mean a food is unhealthy?

No. FDA's general guide describes 20% DV or more of a nutrient per serving as high and 5% DV or less as low. That interpretation applies to the individual nutrient, not the entire food. A high value may be useful for fiber or a concern for sodium depending on your goals, serving size, and overall diet.

Question: Can I compare %DV without checking the serving size?

No. FDA advises making sure the serving sizes are comparable when using %DV to compare products. Align the serving basis first, then calculate your actual portion separately. Otherwise, a smaller serving can make a product appear lower in calories or nutrients without providing a fair comparison.

Tips

Take a photo of the complete Nutrition Facts panel, ingredient list, allergen information, and package size together so the serving context is not lost.
When comparing several products, eliminate unit differences first; it is much easier to make an arithmetic error after rows have been mixed between per-serving and per-package values.
Use a real bowl, cup, or scale once to learn what your usual portion looks like, then repeat the check when you change dishes or products.

Warnings

For food allergies, read the current ingredient list and allergen declaration every time and follow your clinician's instructions; never rely on a front-of-pack claim or an old purchase history.
Serving size is not a personalized recommendation, and % Daily Value is not a complete health grade or a substitute for dietary advice tailored to your age, health, pregnancy, or medical needs.
Do not add Total Sugars and Added Sugars together or add different %DV rows into one total; read each nutrient on the correct serving basis.

Things You'll Need

Two comparable packages with complete Nutrition Facts and ingredient information
A comparison sheet with separate serving, package, and actual-portion columns
A measuring cup, spoons, or kitchen scale for visualizing portions
A calculator for serving and recipe adjustments
Current allergen information and any personal dietary guidance
Optional price, storage, and meal-planning notes for the final choice

Try it with a free tool

You have read the method — now work through your own numbers or text. These free tools run in your browser, need no sign-up and link back to this guide.

Food & EntertainingGrocery ListCombine duplicate rows and sort the list by aisle.Open free tool →