Last verified 17 Sep 2026 · Sources
“Calorie free” requires your product to contain less than 5 calories per Reference Amount Customarily Consumed (RACC) and per labeled serving (21 CFR 101.60(b)(1)(i)). No reference food is needed, since this is an absolute claim. The trap you’re most likely to hit: the Nutrition Facts panel is allowed to round anything under 5 calories down to “0,” but the claim itself runs on your actual unrounded number, not the rounded label value.
| Quick facts | Calorie free |
|---|---|
| Regulation | 21 CFR 101.60(b)(1) |
| Threshold | <5 calories per RACC and per labeled serving |
| Claim type | absolute |
| Reference food needed | No |
| Disclosure statement | Not applicable |
| Wordings FDA allows | Calorie free, Free of calories, No calories, Zero calories, Without calories, Trivial source of calories, Negligible source of calories, Dietarily insignificant source of calories |
What the rule says
21 CFR 101.60(b)(1)(i) states it plainly: “The food contains less than 5 calories per reference amount customarily consumed and per labeled serving.” FDA allows several interchangeable wordings for this same claim: “calorie free,” “free of calories,” “no calories,” “zero calories,” “without calories,” “trivial source of calories,” “negligible source of calories,” or “dietarily insignificant source of calories.”
If your product meets this threshold naturally, without special processing to lower calories, 21 CFR 101.60(b)(1)(ii) requires the label disclose that: “it is labeled to disclose that calories are not usually present in the food (e.g., ‘cider vinegar, a calorie free food’).” So plain seltzer or cider vinegar has to say something like “cider vinegar, a calorie free food”, language that credits the food category generally, not phrasing implying your brand specially engineered the calories out.
The numbers
The threshold has two legs, and both must pass: less than 5 calories per RACC, and less than 5 calories per labeled serving. For most products these are the same number, since RACC sets your legal serving size (21 CFR 101.12); they diverge when your labeled serving differs from the RACC (for example, a package holding less than 200% of the RACC that must be labeled as one serving under 101.9(b)(6)).
Rounding interplay matters here in both directions. 21 CFR 101.9(c)(1) rounds any calorie value under 5 down to “0” on the printed panel, so if your product has, say, 3.2 unrounded calories per RACC, its Nutrition Facts panel shows “0” and it separately qualifies for “calorie free,” because 3.2 is under 5. But a product could show “0” calories on the panel through rounding from something in the 4.5–4.99 range and still just barely qualify, while one rounding down from, say, 4.99 exactly is still under 5 and fine. The point is: the printed “0” is a rounding artifact, not proof of eligibility. You (or your lab) need the unrounded figure to actually confirm the claim, and it needs to be under 5, not “close to 5 after rounding.”
There’s no small-RACC per-50 g test for this claim; that test belongs to “low calorie” under 101.60(b)(2), not “calorie free.” Calorie-free claims are checked per RACC and per labeled serving only, with no per-50-g basis regardless of package size.
On the label
Say you’re formulating a diet hot sauce built mostly on vinegar, water, and capsaicin extract with no added sugar or oil. Your RACC for hot sauce (per 21 CFR 101.12’s table) is 1 teaspoon (5 g), and your labeled serving matches it. Lab or database analysis returns 1.8 calories per 5 g serving, comfortably under 5 both per RACC and per labeled serving, with no calorie-contributing ingredient left unaddressed. That product can print “Calorie Free” or “Zero Calories” on the front panel, and the Nutrition Facts panel itself will correctly show “0” calories per serving under 101.9(c)(1) rounding. See how the panel and claim interact for a specific product on our hot sauce label guide.
A small recipe shift can flip that: if the same product moves to 5.1 unrounded calories per RACC, the claim is now false, even though the printed panel value might barely change.
Mistakes we see
- Reading the printed “0” as license to claim, without checking the unrounded value. Calories round to “0” under 5; always verify against the raw analysis, not the panel.
- Forgetting the calorie-source ingredient rule. An ingredient understood to be a calorie source (a fruit juice concentrate, an oil) needs an “adds a trivial amount of calories” asterisk to keep the claim.
- Making the claim on a small-package or (j)(4) insignificant-nutrients-exempt label. Both exemptions under 21 CFR 101.9(j) require no nutrition claims on the label; adding “calorie free” ends the exemption.
- Assuming “no added sugar” means calorie free. Calories come from fat and protein too. The claim is about total calories, not one ingredient category.
Related claims
See low calorie, reduced calorie, light, and sugar free for the neighboring calorie and sugar claims, plus the general framework at nutrient content claims and rounding rules.
Check your label
Our builder’s claims check runs your product’s actual numbers against this threshold on every basis the rule names (per RACC and per labeled serving) and tells you exactly which calorie claims, and which exact wordings, your product qualifies for.
A “Calorie Free” claim checked against your unrounded number is one you can print without second-guessing it. Enter your recipe, then see your label: your calories, the claims you qualify for and your allergen line are free, no card required, and every other value and %DV stays hidden until you unlock it. $29 unlocks every other nutrient value and %DV, every FDA format your product qualifies for, and the ingredient statement and allergen declaration, ready to print. Start your label or browse all nutrient content claims.
Calorie free claim FAQ
Does the Nutrition Facts panel showing 0 calories mean I qualify for the claim?
Not by itself. The panel rounds under 21 CFR 101.9(c)(1) (below 5 calories rounds to 0), but the claim is evaluated on your unrounded lab or database value: you need that number under 5, not just a rounded zero.
What if my product uses an ingredient that's a source of calories?
You can still claim calorie free if you asterisk that ingredient to a statement like 'adds a trivial amount of calories,' per 21 CFR 101.60(b)(1).
Do I need a reference food for a calorie free claim?
No. Calorie free is an absolute claim under 21 CFR 101.13. It's a fixed threshold, not a comparison, so there's no reference food or comparative statement to declare.
Is calorie free evaluated per 50 g like low calorie is?
No. The 50 g test in 21 CFR 101.60(b)(2) applies only to low-calorie claims on small-RACC foods. Calorie free is checked per RACC and per labeled serving only.
Related claims
Low calorie, Reduced calorie / Fewer calories, Light / Lite, Sugar free. See the full all label claims.