How much sugar per day is fine depends on which sugar you mean. The limits apply to added sugar: sugar, syrups and honey put into food and drinks. The American Heart Association says under 6% of calories, which it puts at about 25 grams (6 teaspoons) a day for most women and 36 grams (9 teaspoons) for most men. The World Health Organization says under 10% of calories, which is 50 grams on a 2,000-calorie day, and ideally under 5%, about 25 grams. Sugar that comes naturally in whole fruit, vegetables and plain milk doesn't count toward any of these.
ChatRPE can show you where your own number lands. Log meals by sentence, photo or barcode with added sugar saved in grams, and ask for a daily total or a per-meal breakdown.
The limits side by side
A teaspoon of sugar is about 4 grams. Each source below counts slightly different sugars, which is why the numbers don't match exactly.
| Source | What it limits | On a 2,000-calorie day |
|---|---|---|
| American Heart Association | Added sugar, under 6% of calories | Under 30 g; the AHA quotes 25 g for most women, 36 g for most men |
| WHO, strong recommendation | Free sugars, under 10% of calories | Under 50 g |
| WHO, conditional recommendation | Free sugars, under 5% of calories | About 25 g |
| FDA Daily Value | Added sugar on US labels | 50 g = 100% DV |
| US Dietary Guidelines 2025–2030 | Added sugar | None recommended; no more than 10 g in one meal |
The percentages scale with your calories, so the gram figures are examples rather than fixed caps. On 1,500 calories, the AHA's 6% is about 22 grams, WHO's 10% about 37 grams and 5% about 19 grams. On 3,000 calories, 6% is about 45 grams.
The current US guidelines take the strictest line. They say no amount of added sugar or non-nutritive sweetener is part of a healthy diet, and that a meal should hold no more than 10 grams of added sugar. For children the advice depends on age: avoid added sugar entirely before age 5, and no amount is recommended through age 10. For adults, the per-meal cap is the most practical part, because it gives you a number to check against one breakfast or one coffee.
What counts as added sugar
Added sugar is any sugar put in during processing, cooking or at the table: table sugar, brown sugar, honey, maple syrup, agave, corn syrup, and fruit juice concentrate used to sweeten another food. The US guidelines' tip for spotting it on an ingredient list is to look for "sugar", "syrup" or a word ending in "-ose" (dextrose, maltose, sucrose).
Sugar inside whole fruit and plain milk doesn't count. The fruit's sugar comes with fiber and water and milk's lactose comes with protein, and WHO leaves them out because no harm has been reported from eating them. Flavored milk and sweetened yogurt count only for the sugar added on top.
Fruit juice is where the definitions split. WHO counts the sugar in all fruit juice as free sugar, including 100% juice. US labels count juice concentrate as added sugar only when it sweetens something else beyond what full-strength juice would contain; 100% juice, including juice from concentrate, has no added sugar. A glass of orange juice can be inside the US added-sugar line and outside WHO's.
Reading the label
A US Nutrition Facts label lists Total Sugars, then a line beneath it reading "Includes X g Added Sugars". The added line is the one the limits refer to. A cup of sweetened yogurt might show 17 g total and 10 g added: the other 7 g is the milk's own lactose.
Labels in the UK and EU usually show only total sugars ("carbohydrate, of which sugars"). The ingredient list shows which sugars were added and roughly how much (the closer to the top, the more), but not the grams, so any added-sugar figure you log for those products is an estimate. Single-ingredient honey and maple syrup labels in the US show added sugar as a percent Daily Value and may leave the grams to a footnote; at a 50-gram Daily Value, each 10% is 5 grams.
Does sugar make you gain weight?
Sugar affects weight through calories. A 2013 BMJ meta-analysis of randomized trials found that adults who cut sugar while otherwise eating freely lost about 0.8 kg on average. When trials swapped sugar for the same calories of other carbohydrate, weight didn't change. Cutting sugar works when it lowers what you eat in total.
That makes sweetened drinks the obvious place to start. WHO notes that one can of soda can hold up to 40 grams of sugar, more than the AHA's whole daily limit for most women, and drinks don't fill you up the way food does. The lose weight without exercise guide covers liquid calories with the other habits that lower intake.
Sweeteners are less settled. Diet drinks remove the calories of a regular soda, and short trials show a small weight benefit when they replace sugar. WHO's 2023 guideline still advises against using them for long-term weight control, a conditional recommendation that doesn't cover people who already have diabetes. Moving toward water, sparkling water and unsweetened tea or coffee avoids the question.
You don't need to hit zero to lose weight. If a daily dessert fits your calorie target and you enjoy it, it can stay. The calorie deficit calculator sets that target, and sugar is one of the easier places to take calories from.
Cutting back without quitting sugar
Find your biggest source before setting a goal. For many people that is drinks: soda, sweet tea, flavored coffee, energy drinks and juice. For others it is breakfast (cereal, flavored yogurt, granola, pastries) or an evening snack. One or two habits usually account for most of the day's added sugar.
Then change one thing at a time. Halve the sugar in your coffee for a week before cutting it further. Switch flavored yogurt for plain with fruit on top. Pick the cereal with less added sugar per serving. A drink swap usually removes the most sugar for the least effort.
Sauces, bread and "healthy" bars carry added sugar too, but often only a few grams per serving. They matter if you eat them several times a day; otherwise start with the bigger sources.
Tracking added sugar in ChatRPE
Tell ChatRPE once to log added sugar in grams on every meal as its own field, separate from total sugar, and to save that as a standing note. Standing notes last 30 days unless you ask for longer, up to 180 days, so ask for the longer window and repeat the request when it runs out. Then log meals the usual way, in a sentence, a photo or a barcode scan.
Be aware of one gap. ChatRPE's food searches and barcode lookups currently return total sugar from Open Food Facts or the USDA database, not added sugar, even when a record lists both. For a packaged food, send a photo of the nutrition label so the added-sugar line can be read, or type the figure in. For a described meal or a meal photo, added sugar is an estimate, the same as its calories.
When you ask for a sugar chart, ask for daily totals. Charts add up calories and macros within a day automatically, but a sugar field gets averaged across the day's meals unless you ask for a total. Asking for an average across entries gives you sugar per meal, which happens to be the right view for the 10-gram-per-meal guideline: ask which meals last week went over it.
For a limit you follow during the day, pin a dashboard card that shows today's added sugar against your target. It shows what is left and starts over each day.
When to talk to a clinician
If you have diabetes, total carbohydrate matters for blood glucose as well as added sugar, and your care team's targets come first. If you use glucose tablets or juice to treat low blood sugar, that is treatment and shouldn't be cut. The carbs per day guide covers medicines that change when you lower carbs.
If tracking sugar makes food feel frightening, or you notice cycles of strict rules and bingeing, stop counting and talk to a doctor or dietitian.
Frequently asked questions
How many grams of sugar per day is okay?
For added sugar, the AHA advises no more than about 25 grams a day for most women and 36 grams for most men. WHO says under 50 grams on a 2,000-calorie diet, ideally under 25. Sugar naturally in whole fruit and plain milk isn't counted in these limits.
Is the sugar in fruit bad for you?
No. Neither WHO nor the US guidelines limit sugar in whole fruit, which comes with fiber and water and is hard to overeat. Fruit juice is different: WHO counts all of its sugar as free sugar, and a glass holds the sugar of several pieces of fruit without the fiber.
How much sugar should I eat a day to lose weight?
There is no special number. Weight loss comes from eating fewer calories in total, and in trials, cutting sugar helped only when it lowered calories. Staying under the AHA limit is a reasonable target, and sweetened drinks are usually the easiest place to cut.
Is 50 grams of sugar a day too much?
It depends on what kind. 50 grams of added sugar is the most that the FDA Daily Value and WHO's 10% limit allow on 2,000 calories, and twice the AHA limit for most women. 50 grams of total sugar that includes fruit and milk is a different and smaller concern.
Does honey count as added sugar?
Yes. Honey, maple syrup and agave count as added sugar in US guidance, as does fruit juice concentrate used to sweeten another food, and WHO counts all of them as free sugars. They aren't meaningfully healthier swaps for table sugar.
How many grams of sugar are in a teaspoon?
About 4 grams. So the AHA's 25-gram limit is roughly 6 teaspoons, and a can of regular soda can hold close to 10.