Costa Signature Latte (Medium, Oat Milk): calories, sugar and caffeine

Costa Signature Latte (Medium, Oat Milk), latte with latte art in a white cup, nutrition and calories

A Medium Signature Latte made with oat milk contains 189 kcal, 10g of free sugar (2.5 teaspoons).

Size: Medium | Milk: Oat Milk | Diet: Vegan | Allergens: Oats

Nutrition by serving: calories, sugar and salt

Costa Signature Latte (Medium, Oat Milk) contains 189 kcal, 9.1g of fat (1g saturated), 22g of carbohydrate (10g sugar), 3.2g of protein, 0.5g of salt.

Nutrition by serving: Costa Signature Latte (Medium, Oat Milk)

Serving	Calories	Salt	Sugar	Free sugar	= teaspoons	Carbs	Protein
Per serving	189 kcal	0.5g	10g	10g	2.5 tsp	22g	3.2g

Free sugar in Costa Signature Latte (Medium, Oat Milk)

Costa Signature Latte (Medium, Oat Milk) contains 10g of free sugar per serving. Moderate free sugar

The NHS free sugar limit is 30g a day for adults, 24g for children aged 7 to 10 and 19g for children aged 4 to 6. Sugars naturally present in milk are excluded.

Free sugar by serving: Costa Signature Latte (Medium, Oat Milk)

Serving	Adult (female) 30g	Adult (male) 30g	Age 11 to 17 30g	Age 7 to 10 24g	Age 4 to 6 19g
Per serving	10g 33%	10g 33%	10g 33%	10g 42%	10g 53%

Boone calculates these percentages from Costa 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; fibre is a target to reach. For guidance only.

Calories in Costa Signature Latte (Medium, Oat Milk)

Costa Signature Latte (Medium, Oat Milk) contains 189 kcal of calories per serving. Low calories

Daily calorie needs vary by age and sex.

Calories by serving: Costa Signature Latte (Medium, Oat Milk)

Serving	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 serving	189 kcal 9%	189 kcal 8%	189 kcal 10%	189 kcal 12%	189 kcal 15%

Saturated fat in Costa Signature Latte (Medium, Oat Milk)

Costa Signature Latte (Medium, Oat Milk) contains 1g of saturated fat per serving. Low saturated fat

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

Saturated fat by serving: Costa Signature Latte (Medium, Oat Milk)

Serving	Adult (female) 20g	Adult (male) 30g	Age 11 to 17 20g	Age 7 to 10 18g	Age 4 to 6 16g
Per serving	1g 5%	1g 3%	1g 5%	1g 6%	1g 6%

Salt in Costa Signature Latte (Medium, Oat Milk)

Costa Signature Latte (Medium, Oat Milk) contains 0.5g of salt per serving. Low salt

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

Salt by serving: Costa Signature Latte (Medium, Oat Milk)

Serving	Adult (female) 6g	Adult (male) 6g	Age 11 to 17 6g	Age 7 to 10 5g	Age 4 to 6 3g
Per serving	0.5g 8%	0.5g 8%	0.5g 8%	0.5g 9%	0.5g 15%

Fibre in Costa Signature Latte (Medium, Oat Milk)

Costa Signature Latte (Medium, Oat Milk) contains 0g of fibre per serving. Low fibre

Fibre is a target to reach rather than a limit to stay under.

Fibre by serving: Costa Signature Latte (Medium, Oat Milk)

Serving	Adult (female) 30g	Adult (male) 30g	Age 11 to 17 25g	Age 7 to 10 20g	Age 4 to 6 15g
Per serving	0g 0%	0g 0%	0g 0%	0g 0%	0g 0%

Free sugar vs total sugar

Where the sugar comes from: Costa Signature Latte (Medium, Oat Milk)

Serving	Total sugar	Free (added) sugar	Naturally occurring	Free sugar in teaspoons
Per serving	10g	10g	0g	2.5 tsp

Made with oat milk, all 10g of sugar counts as free sugar. Sugars in plant drinks come from processing or added sugar rather than lactose, so NHS limits count them in full.

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

Ingredients

Ingredient transparency: Costa Signature Latte (Medium, Oat Milk)

Costa does not publish full ingredient lists for drinks made in store or for unwrapped food, and UK law does not require it for food that is made to order or sold loose. Costa does publish allergen declarations for every item, shown below, and pre-packed items carry full ingredients on the pack.

Without an ingredient list, Boone cannot classify this item under the NOVA system or count its manufactured ingredients.

Allergens at a glance

Costa Signature Latte (Medium, Oat Milk) contains oats as a declared ingredient. It may contain wheat, rye, barley through cross-contamination.

Allergen information: Costa Signature Latte (Medium, Oat Milk)

Allergen	Status
Wheat	May contain
Rye	May contain
Barley	May contain
Oats	Contains
Tree nuts	Not present
Peanuts	Not present
Sesame	Not present
Soya	Not present
Milk	Not present
Eggs	Not present
Fish	Not present
Crustaceans	Not present
Molluscs	Not present
Celery	Not present
Mustard	Not present
Lupin	Not present
Sulphur dioxide and sulphites	Not present

Contains = declared as an ingredient in the Costa UK Allergen and Nutrition Guide (Autumn 2026). May contain = the allergen is present in the manufacturing site or supply chain, so cross-contamination is possible. Costa prepares food and drinks with shared equipment, so no item can be guaranteed allergen free. Ask a barista before ordering if you have an allergy.