FDA Rounding Rules for Nutrition Labels
The FDA requires specific rounding thresholds for every line on the Nutrition Facts panel. This guide covers calories, fat, sodium, carbs, protein, sugars, vitamins, minerals, and % Daily Value — with a printable chart, worked examples, and the exact federal citations.
Last updated June 2026 · Based on the U.S. FDA Code of Federal Regulations, Title 21, Part 101.9(c).
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Why Rounding Matters
The FDA doesn't want nutrition labels cluttered with long decimals, so it mandates exact rounding increments for each nutrient. These aren't suggestions — they're codified in federal regulation (21 CFR 101.9(c)). Round to the wrong increment and your label is technically misbranded, even if your underlying data is perfect.
Getting rounding right also protects you from compliance variance checks — the FDA only allows a declared value to be off from lab-tested reality by a certain margin. Sloppy rounding eats into that margin and can push an otherwise-fine product out of compliance. See how below.
Example error: Rounding 148 calories to 145 cal instead of 150 cal is a violation. Above 50 calories, the increment is 10 — there is no "145" allowed.
The #1 Rule: Round Only at the Very End
This is the single most common mistake, even among experienced food producers. The FDA requires that all calculations be performed on the actual, unrounded nutrient amounts. You add up every ingredient, divide by servings, and only then apply the rounding rule — one time, to the final per-serving number.
Wrong
Round each ingredient (4.4 g → 4 g, 3.6 g → 4 g), then add (4 + 4 = 8 g). The error compounds with every ingredient.
Right
Add the real values first (4.4 + 3.6 = 8.0 g), then round once at the end. The label reflects the true total.
FDA Rounding Rules for Every Nutrient
Calories
- <5 cal → Express as 0
- 5–50 cal → Round to nearest 5 (e.g., 49 → 50)
- Above 50 cal → Round to nearest 10 (e.g., 148 → 150)
Total Fat, Saturated Fat, Trans Fat
The same increments apply to voluntary mono- and polyunsaturated fat.
- <0.5g → Express as 0g
- 0.5g to <5g → Round to nearest 0.5g
- ≥5g → Round to nearest 1g
Cholesterol
- <2mg → Express as 0mg
- 2–5mg → Express as "less than 5mg"
- >5mg → Round to nearest 5mg
Sodium
- <5mg → Express as 0mg
- 5–140mg → Round to nearest 5mg
- >140mg → Round to nearest 10mg
Total Carbohydrate, Dietary Fiber, Total Sugars, Added Sugars
- <0.5g → May express as 0g
- 0.5g to <1g → Use "Contains less than 1g"
- ≥1g → Round to nearest 1g
Protein
- <0.5g → May express as 0g
- 0.5g to <1g → Use "Contains less than 1g"
- ≥1g → Round to nearest 1g
Potassium
Potassium is now mandatory and declared in mg plus % DV. Its mg increments mirror sodium.
- <5mg → Express as 0mg
- 5–140mg → Round to nearest 5mg
- >140mg → Round to nearest 10mg
% Daily Value (DRV Nutrients)
Applies to fat, saturated fat, cholesterol, sodium, carbohydrate, fiber, added sugars, and protein (when % DV is declared).
- Always round to the nearest whole number
- Calculate from the actual amount, then round (don't calculate from the rounded gram value)
Vitamins & Minerals: The % DV Rule Everyone Gets Wrong
Vitamin and mineral % Daily Values do not round to the nearest 1%. They use tiered increments based on how high the % DV is. This trips up almost everyone who builds labels by hand.
Vitamin D, Calcium, Iron, Potassium & other vitamins/minerals
- ≤10% DV → Round to nearest 2% (e.g., 7% → 8%)
- >10% to 50% DV → Round to nearest 5% (e.g., 23% → 25%)
- >50% DV → Round to nearest 10% (e.g., 64% → 60%)
- <2% DV → May declare as 0%, omit, or use a "not a significant source" footnote
Printable FDA Rounding Chart
Bookmark or print this quick-reference table. It covers every increment on a standard Nutrition Facts panel.
| Nutrient / Range | Round to | "Zero" threshold |
|---|---|---|
| Calories (≤50) | Nearest 5 | <5 cal |
| Calories (>50) | Nearest 10 | <5 cal |
| Fat (0.5–5g) | Nearest 0.5g | <0.5g |
| Fat (≥5g) | Nearest 1g | <0.5g |
| Cholesterol | Nearest 5mg | <2mg |
| Sodium / Potassium (≤140mg) | Nearest 5mg | <5mg |
| Sodium / Potassium (>140mg) | Nearest 10mg | <5mg |
| Carbs, Fiber, Sugars, Added Sugars, Protein | Nearest 1g | <0.5g (use "<1g" below 1g) |
| % DV — DRV nutrients | Nearest 1% | — |
| % DV — vitamins/minerals (≤10%) | Nearest 2% | <2% |
| % DV — vitamins/minerals (10–50%) | Nearest 5% | <2% |
| % DV — vitamins/minerals (>50%) | Nearest 10% | <2% |
"Less Than" Statements & Insignificant Amounts
The FDA defines an "insignificant amount" as any amount that allows a declaration of zero — except for total carbohydrate, dietary fiber, and protein, where an insignificant amount is anything that allows a declaration of "less than 1 gram." This is why those nutrients have a special "Contains less than 1 g" option.
Cholesterol 2–5 mg
May be stated as "less than 5 mg."
Carbs / fiber / sugars / protein 0.5–1 g
May be stated as "Contains less than 1 g" or "less than 1 g."
Vitamins / minerals < 2% DV
May use a footnote: "Contains less than 2% of the Daily Value of this nutrient," or a "Not a significant source of ___" statement.
Full Worked Example
Say a single serving of your chicken bowl calculates to these actual values (before rounding). Here's how each line gets rounded for the label.
| Nutrient | Actual | On label | Why |
|---|---|---|---|
| Calories | 472 | 470 | Nearest 10 (>50) |
| Total Fat | 18.4 g | 18 g | Nearest 1g (≥5g) |
| Saturated Fat | 3.7 g | 3.5 g | Nearest 0.5g (<5g) |
| Sodium | 612 mg | 610 mg | Nearest 10mg (>140) |
| Total Carb | 42.6 g | 43 g | Nearest 1g |
| Added Sugars | 0.7 g | <1 g | 0.5–1g range |
| Protein | 38.2 g | 38 g | Nearest 1g |
| Iron % DV | 23% | 25% | Nearest 5% (10–50%) |
Common Rounding Mistakes
❌ Rounding ingredient-by-ingredient
Always sum the real values first, then round once.
❌ Using 1% increments for vitamins/minerals
They use 2% / 5% / 10% tiers — not whole percents.
❌ Allowing "145 cal" above 50 calories
Above 50 cal the only valid endings are 0.
❌ Calculating % DV from the rounded gram value
Calculate % DV from the actual amount, then round the percentage.
Why This Actually Matters: The 20% Tolerance Rule
Rounding your label wrong isn't a paperwork problem — it's a formulation-accuracy problem. Under 21 CFR 101.9(g), the FDA doesn't just check that your rounding followed the right increments. It checks whether your declared values are close enough to what a lab actually finds when the product is analyzed.
Nutrients you want to limit
Calories, total fat, saturated fat, trans fat, cholesterol, sodium, total sugars, and added sugars. The lab-tested amount can't exceed 120% of what's declared on the label — go over that, and the product is misbranded.
Nutrients you want to add
Vitamins, minerals, protein, and fiber. Naturally-occurring amounts must test at 80% or more of the declared value; nutrients added through fortification must test at 100% or more.
This is exactly where the "round ingredient-by-ingredient" mistake above becomes a real problem. A few grams of error on each ingredient in a 15-ingredient recipe can add up to a per-serving calorie count that's meaningfully off from reality — and if that gap pushes the true value past 120% of what's on the label, you're misbranded even though every individual rounding step looked reasonable.
Source: 21 CFR 101.9(g) — Nutrition labeling of food. This is general guidance, not legal advice — talk to a regulatory professional for product-specific questions.
Note: the rounding increments above haven't changed since 1993. If a % DV number looks different than you remember, that's a separate issue — see why the Daily Values themselves were updated in 2016.
Test Yourself
Round It Yourself: 10-Question Practice
0/10 answeredPick the correctly-rounded value for each. Answers are locked in once you click.
1. 47 calories rounds to:
2. 148 calories rounds to:
3. 2.3g of total fat rounds to:
4. 92mg of sodium rounds to:
5. 34.8g of protein rounds to:
6. 53mg of cholesterol rounds to:
7. Iron at 33% DV (raw, unrounded) rounds to:
8. Vitamin D at 7% DV (raw, unrounded) rounds to:
9. 4.2g of dietary fiber rounds to:
10. 3mg of sodium rounds to:
Frequently Asked Questions
How do you round calories on an FDA nutrition label?
Calories under 5 are expressed as 0. From 5 to 50 calories, round to the nearest 5-calorie increment. Above 50 calories, round to the nearest 10-calorie increment. For example, 3 cal becomes 0, 47 cal becomes 45, and 148 cal becomes 150.
How do you round protein, carbs, and fiber?
Protein, total carbohydrate, dietary fiber, total sugars, and added sugars are all rounded to the nearest 1 gram. Below 0.5 g they can be declared as 0 g, and below 1 g you may use "Contains less than 1 g". So 34.8 g protein rounds to 35 g.
How is total fat rounded on the Nutrition Facts label?
Fat (and saturated and trans fat) below 0.5 g is declared as 0 g. Between 0.5 g and under 5 g, round to the nearest 0.5 g. At 5 g or more, round to the nearest 1 g. For example, 2.3 g rounds to 2.5 g and 6.8 g rounds to 7 g.
How do you round % Daily Value for vitamins and minerals?
Vitamin and mineral % Daily Values use tiered increments: round to the nearest 2% up to and including 10% DV, the nearest 5% above 10% through 50% DV, and the nearest 10% above 50% DV. This is different from macronutrient % DV, which always rounds to the nearest whole percent.
Should you round each ingredient or only the final value?
Only round the final per-serving value. The FDA expects calculations to be performed on the actual (unrounded) nutrient amounts and rounded once at the very end. Rounding ingredient-by-ingredient introduces compounding errors and can make your label non-compliant.
What does "Contains less than 1 gram" mean on a label?
For total carbohydrate, dietary fiber, total sugars, added sugars, and protein, an "insignificant amount" is any amount that falls below 1 gram. You may declare it as "less than 1 g" instead of rounding to 0 g or 1 g. For most other nutrients, an insignificant amount is one that rounds to zero.
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