How Much Sugar Should a Child Have? UK Limits by Age
It is half past four, your child has just walked in from school, and the first thing they ask for is a biscuit. Then a juice. Then “just one” sweet from the party bag. By bedtime you have no idea how much sugar went in, and you feel a bit guilty about it. If you have ever wondered how much sugar should a child have in a day, the UK actually has clear numbers, and they are lower than most parents expect.
I am a coach, not a dietitian, but I work with tired parents in Archway every week, and sugar comes up constantly. So in this post I want to give you the official limits by age, show you how to spot sugar on a label in about five seconds, and share swaps that kids actually accept.
How much sugar should a child have? The UK limits by age
The NHS guidance on sugar in our diet sets maximum daily amounts of free sugars. These are maximums, not targets:
| Age | Maximum free sugars a day | Roughly |
|---|---|---|
| Under 1 | No guideline, but no sugar should be added to food or drinks | 0 cubes |
| 1 year | 10g | About 2.5 sugar cubes |
| 2 to 3 years | 14g | About 3.5 sugar cubes |
| 4 to 6 years | 19g | 5 sugar cubes |
| 7 to 10 years | 24g | 6 sugar cubes |
| 11 and over (and adults) | 30g | 7 sugar cubes |
To put that in perspective, a single chocolate bar plus a juice carton can use up a whole day’s allowance for a primary school child. That is not a reason to panic. It is a reason to know where the sugar hides.
What counts as “free sugar”?
Free sugars are:
- Sugar added to food and drinks, like biscuits, cereals, flavoured yoghurts, cakes and fizzy drinks.
- Sugar in honey, syrups and nectars, even “natural” ones like maple or agave.
- Sugar in fruit juice, vegetable juice and smoothies, even unsweetened ones.
What does not count: the sugar naturally found in milk, whole fruit and vegetables. So an apple is fine. Apple juice counts. A plain glass of milk is fine. Strawberry milk counts.
How to spot sugar on a label in five seconds
You do not need to study every packet. You need two quick checks.
- Look at the “Sugars” figure per 100g. More than 22.5g is high (red). 5g or less is low (green). Anything in between is medium (amber).
- Scan the first three ingredients. Ingredients are listed by weight, biggest first. If sugar, glucose syrup, honey or anything ending in “-ose” is near the top, it is a sugar-led product.
One catch: the “of which sugars” number on the back includes natural sugars from milk and fruit too, so a plain yoghurt will show some sugar even though none was added. That is why the ingredients list matters. I go into this properly in my guide on how to read food labels in the UK.
Names sugar hides under
Glucose, fructose, sucrose, dextrose, maltose, corn syrup, invert sugar, honey, agave, molasses, fruit juice concentrate. If you see two or three of these in one list, the total is often higher than it looks.
A realistic day for a 7-year-old
Here is what a day might look like that stays well under 24g of free sugars, without feeling like a punishment:
- Breakfast: porridge made with milk, topped with sliced banana. The banana sweetens it, and it does not count as free sugar.
- School snack: an apple or a few cucumber sticks.
- Lunch: sandwich, plain yoghurt with berries, water.
- After school: toast with peanut butter, or crackers and cheese. More ideas in my post on after school snack ideas.
- Dinner: a normal family meal.
- Pudding: a small treat, like two squares of chocolate or a small scoop of ice cream. Yes, that is allowed.
The point is that a planned treat fits. It is the unplanned extras, the juice, the cereal bar, the flavoured milk, that push kids way over.
Swaps that kids actually accept
The swaps that stick are small and gradual. Children notice big changes and protest. They barely notice small ones.
- Juice to water, slowly. Water down juice a little more each week. The NHS suggests keeping juice and smoothies to 150ml a day in total, with meals only.
- Flavoured yoghurt to plain plus fruit. Let them add their own berries or a few slices of banana. Kids love being in charge of the topping.
- Sugary cereal to a mix. Start with half their usual cereal and half a plainer one, then shift the ratio over a few weeks.
- Cereal bars to toast or crumpets. Many “healthy” bars are held together with syrup.
- Fizzy drinks to sparkling water with a slice of orange or lemon.
- Treats in the cupboard to treats for occasions. If they are not in the house, the 4:30pm battle disappears.
The free NHS Food Scanner app is handy too. Kids enjoy scanning things in the supermarket, and it turns label reading into a game rather than a lecture.
Why this matters for you as well
The adult limit is 30g, and plenty of parents go over it without noticing, usually through coffee shop drinks, biscuits at work and finishing the children’s leftovers. If that sounds familiar, read how to stop eating your kids’ leftovers. Children copy what they see, so the easiest way to change their habits is often to quietly change yours first.
Moving more helps here too. Parents who train regularly tell me they crave sugary snacks less in the afternoon slump, mostly because they feel less drained. Our SYP Recharge energy and focus class is built for exactly that tired, end-of-day feeling.
If your child has diabetes, a medical condition or a restricted diet, follow the advice of your GP, paediatric team or a registered dietitian rather than general guidance.
FAQs
Does sugar in fruit count towards my child’s limit?
No. Sugar inside whole fruit is not a free sugar. Juice and smoothies do count, because blending or squeezing releases the sugar. That is why whole fruit is the better choice.
Is honey healthier than sugar for children?
Not in terms of the limit. Honey counts as free sugar in the same way as table sugar. Also, honey should never be given to babies under 12 months.
How many grams of sugar is a sugar cube?
Roughly 4g. So a drink with 20g of sugar is about 5 cubes, which is the full daily maximum for a 5-year-old.
Does sugar make children hyperactive?
The evidence for a direct “sugar rush” is weak. The bigger concerns with too much sugar are tooth decay and extra calories, which is why the NHS sets these limits.
Book your first class
Helping your kids eat well is much easier when you have the energy to keep going yourself. SYP Bootcamp runs 45-minute small-group classes in Archway N19, with a maximum of 10 people, all fitness levels, and every exercise has an easier and harder version. Classes are indoors in a church hall and cost £15 each. Book your £15 class here, or call or WhatsApp me on 07301 512215. If you would rather start with one-to-one support for your own eating and training, take a look at the SYP Fitness transformation programme.
About the author
Artem Olekhnovych is a personal trainer in Archway and the founder of SYP Fitness and SYP Bootcamp. He has coached clients in Archway, Highgate and across North London for over 10 years, and runs small-group bootcamp classes for busy mums and dads. Read reviews from his 1-1 clients.
