Calculated instantly in your browser — nothing is sent to or stored on our servers. Your log resets when you leave this page.
Medical Disclaimer: This calculator provides a general estimate based on established research and is for educational purposes only, not a substitute for medical advice. Individual results can vary based on health conditions, so consult a qualified healthcare professional or registered dietitian before making significant changes to your diet, exercise, or health routine. Read our full Medical Disclaimer.
How Added Sugar Intake Is Calculated
Added sugar is sugar and syrups added during food processing or preparation, distinct from the natural sugars in whole fruit, vegetables, or plain dairy. Two major health bodies have each published guidance on it, using different methods, which is why this calculator tracks against both rather than picking one silently¹,².
What This Calculator Measures
This tracks your logged added sugar intake against two different reference frameworks at once, WHO's percentage-of-calories limit and AHA's sex-specific fixed gram target, clearly labeled as two different approaches, not merged into one number.
The Formula
WHO: free sugars, which include added sugars, under 10% of total calories, with an ideal target under 5%, converted to grams using 4 kcal per gram¹.
WHO limit (g) = calories × 0.10 ÷ 4
WHO ideal (g) = calories × 0.05 ÷ 4
AHA: a fixed calorie-based limit by sex, no more than 100 kcal/day (about 25g) for most women, 150 kcal/day (about 36g) for most men².
How This Calculator Computes Your Result
Log added-sugar sources using the quick-add buttons or manual entry. We sum your running daily total against both frameworks, showing where you stand relative to WHO's percentage-based limit and AHA's fixed gram target side by side.
Worked Example
A man with a 2,000-calorie target logs a 12 oz can of soda (39g) and a flavored yogurt (15g), for 54g of added sugar. That is 108% of the WHO line (50g) and 150% of the AHA line for men (36g), so both bars change color.
The calorie box defaults to 2,000. Our calorie calculator can estimate your own number.
WHO Limits at Common Calorie Levels
Here is the calculator's WHO rule at common intakes. The AHA limits do not change with calories².
Daily calories | Under 10% (g) | Under 5% (g) |
1,600 | 40 | 20 |
1,800 | 45 | 22.5 |
2,000 | 50 | 25 |
2,200 | 55 | 27.5 |
2,500 | 62.5 | 31.3 |
At 2,000 calories, the 10% line matches the FDA Daily Value for added sugars, 50g a day⁴.
Why Added Sugar Specifically, and Why It's Tracked This Closely
This isn't guidance based on general dietary caution, it's tied to a specific, measured outcome. A large cohort study following US adults for over a decade found that people getting 25% or more of their daily calories from added sugar had nearly three times the cardiovascular disease mortality risk of those getting less than 10% (hazard ratio 2.75), and the relationship held even after accounting for other risk factors³.
That's a meaningfully larger effect than many people expect from something as ordinary as added sugar. It was an observational study, so it shows a link, not proof of cause. It also came after the AHA limits, which date from 2009², and WHO based its limits mainly on weight gain and tooth decay¹.
Added Sugars vs Natural Sugars
On a US label, added sugars include sugars added during processing (such as sucrose or dextrose), sugars sold as sweeteners, sugars from syrups and honey, and sugars from concentrated fruit or vegetable juices. Sugars naturally present in milk, fruit and vegetables are not counted⁴.
WHO's term, free sugars, also covers the sugars naturally present in fruit juices, but not the sugars in fresh fruit and vegetables or the sugars naturally in milk¹. That is why fruit juice is one of the quick-add options: it counts toward the WHO line even though whole fruit does not.
Reading the Added Sugars Line on a Label
On the Nutrition Facts label, added sugars sit under Total Sugars, shown in grams and as a percent Daily Value (%DV). The word Includes means they are already part of the Total Sugars figure⁴. The Daily Value is 50g a day based on a 2,000-calorie diet, and a serving with 5% DV or less is a low source, while 20% DV or more is a high source⁴.
Log the grams from the Added Sugars line, not Total Sugars, and multiply by the number of servings you actually ate.
What the 2025-2030 Dietary Guidelines Say
The Dietary Guidelines for Americans, 2025-2030, released in January 2026, say no amount of added sugars or non-nutritive sweeteners is recommended as part of a healthy diet, and that one meal should contain no more than 10g of added sugars⁵. The 2020-2025 edition set added sugars at less than 10% of calories a day from age 2⁶. The new edition gives no percent-of-calories limit. It advises avoiding added sugars from birth to age 4 and says no amount is recommended for children aged 5 to 10⁵.
The calculator does not apply the per-meal figure; it compares your daily total with the WHO and AHA limits.
A Note on Accuracy
This tracks added sugars, not naturally occurring sugars in whole fruit, vegetables, or plain dairy, which are not the target of either guideline and don't need to be counted the same way. If you have diabetes or another condition affected by sugar intake, your doctor or dietitian may set a different target.
Frequently Asked Questions
How much added sugar should I eat each day?
WHO advises keeping free sugars under 10% of total daily calories, ideally under 5%¹, and AHA sets a fixed limit of about 25g for most women and 36g for most men². The 2025-2030 Dietary Guidelines for Americans say no amount of added sugars is recommended as part of a healthy diet, and that one meal should contain no more than 10g⁵.
Why do WHO and AHA use different methods?
WHO frames its guidance as a percentage of total calories, which scales naturally with how much someone eats overall¹. AHA uses a fixed gram target by sex instead, simpler to apply without doing calorie math². Neither is wrong, they're just structured differently.
Does added sugar intake really affect health outcomes this much?
Yes. A large long-term cohort study found people getting a quarter or more of their calories from added sugar had nearly three times the cardiovascular mortality risk of those getting under 10%³, a substantially larger effect than most people assume.
Do fruit and dairy sugars count toward this limit?
No. This tracks added sugars specifically, not the natural sugars already present in whole fruit, vegetables, or plain dairy, which aren't the target of either guideline. Fruit juice is the exception under WHO's definition, which counts the sugars in juice as free sugars¹.
Sources
Guideline: Sugars Intake for Adults and Children, World Health Organization, 2015
Dietary Sugars Intake and Cardiovascular Health: A Scientific Statement From the American Heart Association, Johnson et al., Circulation, 2009
Added Sugar Intake and Cardiovascular Diseases Mortality Among US Adults, Yang et al., JAMA Internal Medicine, 2014
Added Sugars on the Nutrition Facts Label, U.S. Food and Drug Administration
Dietary Guidelines for Americans, 2025-2030, USDA & HHS, 2026
Dietary Guidelines for Americans, 2020-2025, USDA & HHS, 2020