// Nutrition Calculators

Sugar Intake Calculator

Type the free sugars in your day and the calories they sit inside.

Your details

Your result

Free sugars as a share of your energy
10.9%
WHO recommends below (strong)
10%
Which is, at your calories
55g
WHO further suggests below (conditional)
5%
Which is, at your calories
28g
Your intake in teaspoons
15
  • Free sugars, not total sugars. WHO's figures cover sugar added by a manufacturer, a cook or you, plus the sugar in honey, syrups, fruit juices and fruit juice concentrates. The sugar inside a whole apple and the lactose in milk are outside them, which is why a nutrition label's total-sugar line is the wrong number to type here.
  • The two thresholds do not carry the same weight. Below 10% is a strong recommendation. Below 5% is a conditional suggestion for additional benefit, resting on evidence WHO itself grades as very low quality — it is not a maximum, a cap or a limit, and this page will not call it one.
  • Fruit juice counts even with nothing added to it. That is the part most people get wrong, and it is the difference between a figure that reflects the guidance and one that quietly excludes a glass of orange juice.

Estimates are for general guidance only and are not medical advice. For a personalised plan, book a free guided tour at RPM Gym.

What your result means

The headline is a percentage because WHO's guidance is a percentage. Sugar carries 4 kcal a gram, so the page multiplies your grams by four, divides by the calories you entered, and reports what proportion of the day's energy those sugars supplied. The two gram figures underneath are that same guidance converted back at your own calorie intake, which is why they are not 50 g and 25 g unless you happen to eat 2,000 kcal.

Free sugars are a defined category, not a synonym for sugar. They are what a manufacturer, a cook or you added, plus the sugars already present in honey, syrups, fruit juices and fruit juice concentrates. Sugars inside intact fruit and vegetables sit outside the definition, as do lactose and galactose in milk. WHO's reason for the exclusion is narrower than it is usually repeated as: no evidence of adverse effects from those sugars was reported. That is not the same claim as total sugars being irrelevant.

Fruit juice counts in full, with nothing added to it. It is the point readers get wrong most often, and it is why the total-sugar line on a nutrition label is the wrong number to type here: that line adds the lactose in the milk and the fructose in the fruit to whatever was actually sweetened, so it runs high on some foods and low on a day built from juice.

The two levels do not carry equal weight, and the page keeps them apart. Below 10% of total energy is a strong recommendation. Below 5% is separate — WHO suggests it for additional health benefits, conditionally, resting on evidence it grades as very low quality: population-level data on dental caries from three national datasets rather than trials. Neither figure is a maximum, a cap or a personal allowance, and nothing switches on when you cross one.

How it is calculated

WHO free-sugars levels, evaluated as a share of total energy

Share of energy = free sugars (g) × 4 kcal/g ÷ daily calories × 100 Grams at 10% of energy = daily calories × 0.10 ÷ 4 Grams at 5% of energy = daily calories × 0.05 ÷ 4 Teaspoons = free sugars (g) ÷ 4 No bodyweight, age or sex term. WHO's guidance is written against energy intake, not against a person.

What it assumes

  • Sugar is counted at 4 kcal a gram. That conversion is the whole reason a figure in grams can be expressed as a share of energy at all.
  • What you type is free sugars, not total sugars. Nothing here can check that, and it is the input that decides whether the answer means anything.
  • The calories are what you actually eat, not a target borrowed from another calculator. A proportion of energy is only meaningful against the energy that was really there.
  • A teaspoon is treated as 4 g. WHO's own explainer rounds differently, describing 50 g as about 12 level teaspoons where 4 g a spoon gives 12.5, so read the teaspoon row as a picture rather than a measurement.
  • The gram rows are rounded to whole grams. At 2,200 kcal the 5% figure is 27.5 g and displays as 28.

Units and rounding

  • Grams of free sugars in, kilocalories in, a percentage out. The gram figures underneath are outputs, not inputs.
  • Kilojoules are not accepted. Divide by 4.184 first if your label is metric-only.
  • Zero grams returns zero rather than an error, and the reference figures still display.

Worked example

A day already totalled from packets and labels: 60 g of free sugars across about 2,200 kcal. The total includes a 250 ml glass of orange juice with nothing added to it.

  1. 60 × 4 = 240 kcal from free sugars
  2. 240 ÷ 2,200 = 10.9% of the day's energy
  3. 10% of 2,200 kcal is 55 g; 5% is 27.5 g, shown as 28 g
  4. 60 ÷ 4 = 15 teaspoons
  5. The same 60 g on a 2,000 kcal day reads 12%

10.9%, from 60 g. The last line is the one to keep. Nothing about the food changed between 2,200 and 2,000 kcal, and the share still moved to 12%, because the guidance is a proportion and eating less of everything else raises it. The juice matters in the other direction: leave it out of the 60 g on the grounds that nobody sweetened it and the reading drops for a reason WHO's definition does not accept.

Limitations

  • The page cannot see your food. It converts a number you supply, so a total assembled from memory produces a share with exactly the precision of that memory.
  • Free sugars are genuinely awkward to total. Most labels publish total sugars, restaurant food publishes nothing, and home cooking is whatever went into the pan.
  • This is population guidance. WHO's levels were set to inform national dietary policy and to reduce risk of unhealthy weight gain and dental caries across a population, and they describe what a diet looks like in aggregate rather than what any one of your days must contain.
  • One day is not a diet. Nothing in the guidance is written about a single day, and a normal week tells you more than the worst one does.
  • The tool is blind to what the sugar arrived with. Forty grams in a dessert after a meal and forty grams sipped across a working day are the same input here, and the page will not pretend otherwise.

What to do next

  • Total the drinks before anything else. Liquids are where free sugars concentrate for most people, and they are the easiest line to correct without changing what you cook.
  • If the juice was the surprise, whole fruit is the swap the definition itself points at — the same fruit intact sits outside free sugars entirely.
  • Some labels separate added sugars from total sugars. Where yours does, that line plus any juice, honey or syrup in the day gets you far closer than the total-sugar line ever will.
  • Run it again on an ordinary day rather than the one that prompted you to look. The number you want is the one that repeats.
  • If you are eating fewer calories than usual, watch the share rather than the grams. The denominator shrank, so the same food reads higher without anything having changed on the plate.

Sources

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// Frequently Asked

Questions, answered.

How much sugar a day does WHO recommend?

Less than 10% of total energy intake from free sugars, for adults and children, as a strong recommendation. WHO then suggests below 5% for additional health benefits. At about 2,000 kcal those work out at 50 g and roughly 25 g, which WHO describes as about 12 and 6 level teaspoons. Both are proportions of energy, so at other calorie intakes the grams differ.

Does fruit juice count as free sugars?

Yes, in full, even with nothing added to it. WHO's definition names fruit juices and fruit juice concentrates alongside honey and syrups. The sugar in an intact orange does not count; the sugar in a glass of orange juice does. Freshly squeezed and unsweetened make no difference to the definition.

Is the sugar in fruit and milk included?

No. Intrinsic sugars inside intact fruit and vegetables, and the lactose and galactose in milk, sit outside the definition WHO's levels apply to. The stated reason is that no adverse effects from those sugars were reported. That is an exclusion from the scope of the guidance rather than a verdict on the foods.

Why can't I just type the total sugars off the label?

Because that line adds intrinsic sugars to free ones. A fruit yoghurt's total-sugar figure counts the lactose and the fruit's own sugars alongside what the manufacturer put in, so it overstates free sugars — while a day built on juice can be understated by anyone assuming juice is exempt. The label is the right place to start; the total-sugar line is the wrong row on it.

Should I be aiming for 5% or 10%?

They are different kinds of statement rather than two options. Below 10% is what WHO recommends, and it is graded strong. Below 5% is what WHO suggests on top of it, graded conditional, on evidence WHO itself calls very low quality — ecological data on dental caries. The page shows both because leaving the second one out would hide the guidance, and dressing it up as a target would misrepresent it.

What about sports drinks and gels?

The definition does not change for people who train: sugar added to a drink is a free sugar whether it is drunk at a desk or in the last kilometre. Whether carbohydrate during exercise is worth taking is a performance question with its own answer, and this page does not attempt it. It counts what you consumed.

The line on the label is not the number this page wants.

Getting a free-sugars total right takes a day of reading packets, and it is almost always the drinks that decide it. If you want that turned into something you actually eat around training, book a free guided tour at RPM Gym in Al Manhal.

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