Big Breakwich Spud: calories and sugar by portion and age

Subway Big Breakwich Spud, jacket potato with butter, melted cheese and bacon, sausage, hash brown and poached egg on white paper, nutrition and calories

Boone’s analysis puts Subway Big Breakwich Spud at 37% of an adult’s daily calories, 83% of the daily salt limit for a child aged 4 to 6 and 1.6 teaspoons of free sugar.

How many calories are in a Subway Big Breakwich Spud? It contains 738 kcal, 37g of fat (16g saturated), 6.4g of sugar and 2.5g 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 sub, a side, a cookie, cheese or a sauce, then choose your age and sex for a more accurate view of how a Big Breakwich Spud fits into a day.

Nutrition information

Nutrition information: Subway Big Breakwich Spud

Energy	738 kcal
Fat	37g
of which saturates	16g
Carbohydrate	69g
of which sugars	6.4g
Fibre	9.6g
Protein	32g
Salt	2.5g

Nutrition figures are Subway UK and ROI published data (September 2026), per item as sold. Boone converts them to the portion and age comparisons on this page.

Subway Big Breakwich Spud contains 738 kcal, which is 37% of the 2,000 kcal adult daily reference intake. It provides 37g of total fat, of which 16g is saturated, 6.4g of sugar, 2.5g of salt and 32g of protein.

The saturated fat content of 16g represents 80% of the adult daily guideline of 20g. It also provides 9.6g of fibre, 32% of the 30g adult daily recommendation.

Subway gives the portion weight as 502g, which works out at 147 kcal per 100g.

Sugar in Subway Big Breakwich Spud

Subway Big Breakwich Spud contains 6.4g of free sugar per standard serving (1.6 teaspoons). Subway publishes a total sugar figure of 6.4g and Boone counts all of it as free sugar. Moderate 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 and vegetables.

Free sugar by portion: Subway Big Breakwich Spud

Portion	Adult (female) 30g	Adult (male) 30g	Age 11 to 17 30g	Age 7 to 10 24g	Age 4 to 6 19g
Per portion	6.4g 21%	6.4g 21%	6.4g 21%	6.4g 27%	6.4g 34%

Teaspoons: 1.6 tsp

Boone calculates these percentages from Subway 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 Subway Big Breakwich Spud

Subway Big Breakwich Spud contains 2.5g 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: Subway Big Breakwich Spud

Portion	Adult (female) 6g	Adult (male) 6g	Age 11 to 17 6g	Age 7 to 10 5g	Age 4 to 6 3g
Per portion	2.5g 42%	2.5g 42%	2.5g 42%	2.5g 50%	2.5g 83%

Calories in Subway Big Breakwich Spud

Subway Big Breakwich Spud contains 738 kcal per standard serving. High calorie share

Daily calorie needs vary by age and sex.

Calories by portion: Subway Big Breakwich Spud

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	738 kcal 37%	738 kcal 30%	738 kcal 38%	738 kcal 48%	738 kcal 57%

Saturated fat in Subway Big Breakwich Spud

Subway Big Breakwich Spud contains 16g 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: Subway Big Breakwich Spud

Portion	Adult (female) 20g	Adult (male) 30g	Age 11 to 17 20g	Age 7 to 10 18g	Age 4 to 6 16g
Per portion	16g 80%	16g 53%	16g 80%	16g 89%	16g 100%

Free sugar vs total sugar

Where the sugar comes from: Subway Big Breakwich Spud

All 6.4g counts as free sugar. Boone makes no deduction for milk or whole fruit in this item. That is 1.6 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: Subway Big Breakwich Spud

Boone cannot classify this item, because Subway does not 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

Subway does not publish an ingredient list for this item

Ingredients: Subway Big Breakwich Spud

Subway’s September 2026 UK nutrition and allergen guides do not include an ingredient list for a Subway Big Breakwich Spud, and it is under no legal obligation to provide one.

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.

Without one, 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.

Subway publishes allergen information for each ingredient, and Boone uses it to build the allergen table below. Recipes change, so always check in restaurant before ordering if you have an allergy.

Allergens at a glance

Subway Big Breakwich Spud contains wheat, milk, eggs and gluten.

Allergen information: Subway Big Breakwich Spud

Allergen	Status
Wheat	Contains
Rye	Not present
Barley	Not present
Oats	Not present
Spelt	Not present
Sesame	Not present
Soya	Not present
Milk	Contains
Eggs	Contains
Fish	Not present
Crustaceans	Not present
Molluscs	Not present
Peanuts	Not present
Tree nuts	Not present
Celery	Not present
Mustard	Not present
Lupin	Not present
Sulphites	Not present

Contains = declared as an ingredient. May contain traces = Subway’s suppliers say the allergen is present at the manufacturing site and there is a significant risk of cross-contamination. Subway publishes allergens by ingredient, not by finished item, so Boone builds this table from the jacket potato and its toppings. Food is freshly prepared in Subway kitchens where many allergens are handled, so Subway cannot guarantee any item is allergen free. Vegan items are made to vegan recipes but are not suitable for people with milk or egg allergies.

Frequently asked questions

How many calories are in a Subway Big Breakwich Spud?+

Boone calculates that a Subway Big Breakwich Spud contains 738 kcal, which is 37% of an adult’s 2,000 kcal daily reference intake and 57% of the daily intake for a child aged 4 to 6.

How much sugar is in a Subway Big Breakwich Spud?+

A Subway Big Breakwich Spud contains 6.4g of sugar, all of which counts as free sugar, or about 1.6 teaspoons. That is 21% of an adult’s 30g daily limit and 34% of the 19g limit for a child aged 4 to 6.

How much saturated fat is in a Subway Big Breakwich Spud?+

A Subway Big Breakwich Spud contains 16g of saturated fat. Boone calculates this as 80% of the daily guideline for an adult woman and 53% for an adult man, because the guideline differs by sex: 20g and 30g.

How much salt is in a Subway Big Breakwich Spud?+

A Subway Big Breakwich Spud contains 2.5g of salt. Boone calculates that as 83% of the daily limit for a child aged 4 to 6 and 42% of an adult’s 6g limit.

Is a Subway Big Breakwich Spud ultra-processed?+

Subway 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.

Is a Subway Big Breakwich Spud classed as less healthy?+

Under the government’s 2018 nutrient profiling model a Subway Big Breakwich Spud scores 0. The model classes a food scoring 4 or more as less healthy, so this item would not be. The 2018 model is published but not yet used for advertising rules. Subway publishes fibre, so Boone uses its figure.