Daily Sugar Limit Calculator

Added sugar is one of the most important dietary factors to control. Unlike natural sugars found in fruit or milk, added sugars provide calories with no nutritional benefit, and a high intake is strongly linked to obesity, type 2 diabetes, cardiovascular disease, and tooth decay.

What are added sugars?

Added sugars include table sugar (sucrose), high-fructose corn syrup, honey, maple syrup, agave, and any sugars added during food processing. They do NOT include naturally occurring sugars in whole fruit, vegetables, or dairy.

Recommended daily limits:

The American Heart Association (AHA) recommends:

• Men: No more than 36g per day, which the AHA rounds off as “about 9 teaspoons”
• Women: No more than 25g per day, or “about 6 teaspoons”
• Children (ages 2–18): No more than 25g per day, and under age 2, ideally none

A level teaspoon of granulated sugar actually weighs about 4.2 grams, so 36g is nearer 8.6 teaspoons than 9. The calculator uses the real 4.2g figure rather than the rounded headline, which is why its teaspoon numbers can sit slightly below the ones you see quoted.

The World Health Organization (WHO) recommends keeping free sugars below 10% of total daily calories, with additional benefits if you can get below 5%. Free sugars are added sugars plus the sugar in fruit juice, so a glass of orange juice counts against the WHO limit even though nothing was added to it.

How to calculate the WHO limit:

If your daily calorie need is 2,000 kcal, then 10% = 200 kcal from sugar. Since 1 gram of sugar = 4 calories, that’s 50 grams maximum, or 25 grams for the stricter 5% target.

For the weight loss and blood sugar goals the calculator uses that stricter 5% target rather than inventing a number of its own. It is the one figure a major guideline already offers for doing better than the basic limit.

The newest US advice is stricter still

The 2025-2030 Dietary Guidelines for Americans, published in January 2026, say no amount of added sugar is part of a healthy diet. Where some is eaten, a single meal should hold no more than 10 g, which is about 30 g over three meals, and young children should have none at all.
That is a per-meal cap rather than a daily one, so the calculator shows it beside your daily limit instead of folding it in.

Common hidden sugar sources:

• 1 can of soda: ~39g added sugar
• 1 flavored yogurt: ~15–25g
• 1 tablespoon ketchup: ~4g
• 1 granola bar: ~10–15g
• 1 sports drink (12 oz): ~21g, and a 20 oz bottle is ~34g

If you do not know your calorie intake, the Daily Sugar Intake Calculator estimates it from age, sex and activity, and checks a day’s sugar against the result.

If you have diabetes or metabolic conditions, your doctor may recommend stricter limits. Always follow personalized medical advice.