Zinger Stacker Burger: calories and sugar by portion and age

KFC Zinger Stacker Burger, double crispy chicken burger with cheese, lettuce and spicy sauce in a sesame bun, nutrition and calories

Boone’s analysis puts KFC Zinger Stacker Burger at 41% of an adult’s daily calories, 123% of the daily salt limit for a child aged 4 to 6 and 3.2 teaspoons of free sugar.

How many calories are in a KFC Zinger Stacker Burger? It contains 813 kcal, 42.3g of fat (7.7g saturated), 13g of sugar and 3.7g of salt.

Build a full meal with our nutrition calculator

Use the Boone meal calculator to build a full meal rather than view this item on its own. Add a main, a side, a dip and a drink, then choose your age and sex for a more accurate view of how a Zinger Stacker Burger fits into a day.

Nutrition information

Nutrition information: KFC Zinger Stacker Burger

Energy	813 kcal
Fat	42.3g
of which saturates	7.7g
Carbohydrate	60.9g
of which sugars	13g
Salt	3.7g
Protein	45.1g

Nutrition figures are KFC UK published data, per item as sold and before any optional sauces or extras. KFC states its figures are averages of composite samples, so there may be variation by supplier and season. Boone converts them to the portion and age comparisons on this page.

KFC Zinger Stacker Burger contains 813 kcal, which is 41% of the 2,000 kcal adult daily reference intake. It provides 42.3g of total fat, of which 7.7g is saturated, 13g of sugar, 3.7g of salt and 45.1g of protein.

The saturated fat content of 7.7g represents 38% of the adult daily guideline of 20g.

KFC does not publish a portion weight for this item, so Boone cannot show a per 100g figure.

Sugar in KFC Zinger Stacker Burger

KFC Zinger Stacker Burger contains 13g of free sugar per standard serving (3.2 teaspoons). KFC publishes a total sugar figure of 13g and none of it is naturally occurring. High sugar

The NHS free sugar limit is 30g per day for adults, 24g for children aged 7 to 10, and 19g for children aged 4 to 6. Free sugar excludes the sugars naturally present in milk and whole fruit.

Free sugar by portion: KFC Zinger Stacker Burger

Portion	Adult (female) 30g	Adult (male) 30g	Age 11 to 17 30g	Age 7 to 10 24g	Age 4 to 6 19g
Per portion	13g 43%	13g 43%	13g 43%	13g 54%	13g 68%

Teaspoons: 3.2 tsp

Boone calculates these percentages from KFC UK published nutrition data against UK Dietary Reference Values and NHS free sugar and salt limits. Free sugar, salt, calories and saturated fat are limits to stay under. For guidance only.

Salt in KFC Zinger Stacker Burger

KFC Zinger Stacker Burger contains 3.7g of salt per standard serving. High salt

Children have lower salt limits: 3g per day for ages 4 to 6, 5g for ages 7 to 10.

Salt by portion: KFC Zinger Stacker Burger

Portion	Adult (female) 6g	Adult (male) 6g	Age 11 to 17 6g	Age 7 to 10 5g	Age 4 to 6 3g
Per portion	3.7g 62%	3.7g 62%	3.7g 62%	3.7g 74%	3.7g 123%

Calories in KFC Zinger Stacker Burger

KFC Zinger Stacker Burger contains 813 kcal per standard serving. High calorie share

Daily calorie needs vary by age and sex.

Calories by portion: KFC Zinger Stacker Burger

Portion	Adult (female) 2000 kcal	Adult (male) 2500 kcal	Age 11 to 17 1936 kcal	Age 7 to 10 1553 kcal	Age 4 to 6 1291 kcal
Per portion	813 kcal 41%	813 kcal 33%	813 kcal 42%	813 kcal 52%	813 kcal 63%

Saturated fat in KFC Zinger Stacker Burger

KFC Zinger Stacker Burger contains 7.7g of saturated fat per standard serving. High saturated fat

The saturated fat guideline is 20g a day for women and 30g for men, and lower for children.

Saturated fat by portion: KFC Zinger Stacker Burger

Portion	Adult (female) 20g	Adult (male) 30g	Age 11 to 17 20g	Age 7 to 10 18g	Age 4 to 6 16g
Per portion	7.7g 38%	7.7g 26%	7.7g 38%	7.7g 43%	7.7g 48%

Free sugar vs total sugar

Where the sugar comes from: KFC Zinger Stacker Burger

All 13g counts as free sugar. There is no milk or whole fruit in this item, so nothing is deducted. That is 3.2 teaspoons.

NHS daily free sugar limits: 30g for adults and children 11+, 24g age 7 to 10, 19g age 4 to 6.

Ultra-processed food: what is really in it

Processing: KFC Zinger Stacker Burger

Boone cannot classify this item, because KFC chooses not to publish an ingredient list for it.

NOVA classification is read from an ingredient list. Without one there is no way to count additives, separate raw ingredients from manufactured ones, or say whether an item is ultra-processed. Boone does not estimate a NOVA group, because a guess presented as a classification would be worse than saying nothing.

Ingredients

KFC chooses not to publish an ingredient list

Ingredients: KFC Zinger Stacker Burger

KFC does not publish the ingredients in a KFC Zinger Stacker Burger, and it is under no legal obligation to do so.

Food made to order in a restaurant counts as non-prepacked under UK food law. The legal requirement is to declare the 14 major allergens, and for large businesses in England to show calories at the point of choice. A full ingredient list is voluntary. Some chains publish one anyway. KFC does not.

This means no page on this site can tell you how many ingredients are in this item, how many of them are manufactured substances, or whether it is ultra-processed. Boone will not estimate any of it. That absence is KFC’s decision, not an omission on our part.

KFC is not unusual in this. UK law lets any chain serving food made to order skip ingredient labelling entirely, and the chains that publish do so by choice.

Allergen information for this item is published by KFC and is shown below. Recipes change, so always check in restaurant before ordering if you have an allergy.

Allergens at a glance

KFC Zinger Stacker Burger contains sesame, milk, eggs and wheat.

Allergen information: KFC Zinger Stacker Burger

Allergen	Status
Wheat	Contains
Rye	May contain traces
Barley	May contain traces
Oats	May contain traces
Spelt	May contain traces
Sesame	Contains
Soya	May contain traces
Milk	Contains
Eggs	Contains
Fish	Not present
Crustaceans	Not present
Celery	May contain traces
Mustard	Not present
Sulphites	Not present
Peanuts	Not present
Nuts	Not present
Molluscs	Not present
Lupin	Not present

Contains = declared as an ingredient. May contain traces = KFC states the allergen cannot be excluded. KFC prepares food in kitchens where equipment is shared, so no item can be guaranteed allergen free. All buns are toasted in the same toaster, and fries and hash browns are cooked in the same oil as the popcorn chicken and bites.

Frequently asked questions

How many calories are in a KFC Zinger Stacker Burger?+

Boone calculates that a KFC Zinger Stacker Burger contains 813 kcal, which is 41% of an adult’s 2,000 kcal daily reference intake and 63% of the daily intake for a child aged 4 to 6.

How much sugar is in a KFC Zinger Stacker Burger?+

A KFC Zinger Stacker Burger contains 13g of sugar, all of which counts as free sugar, or about 3.2 teaspoons. That is 43% of an adult’s 30g daily limit and 68% of the 19g limit for a child aged 4 to 6.

How much saturated fat is in a KFC Zinger Stacker Burger?+

A KFC Zinger Stacker Burger contains 7.7g of saturated fat. Boone calculates this as 38% of the daily guideline for an adult woman and 26% for an adult man, because the guideline differs by sex: 20g and 30g.

How much salt is in a KFC Zinger Stacker Burger?+

A KFC Zinger Stacker Burger contains 3.7g of salt. Boone calculates that as 123% of the daily limit for a child aged 4 to 6 and 62% of an adult’s 6g limit.

Is a KFC Zinger Stacker Burger ultra-processed?+

KFC does not publish ingredient lists for food made to order, and UK law does not require it to, so Boone cannot assign a NOVA group to this item.

What allergens are in a KFC Zinger Stacker Burger?+

KFC Zinger Stacker Burger contains sesame, milk, eggs and wheat. KFC also states that soya, celery, barley, oats, rye, spelt cannot be excluded.