Flat White Calories, Caffeine & Nutrition by Size and Milk
Find Flat White calories, sugar, fat, and caffeine by size and milk option. Compare Tall, Grande, and Venti to make the best choice for your goals.
Nutrition Calculator
Flat White Calories by Size and Milk Option
Select your drink, size, and milk option to view calories, sugar, fat, carbs, protein, and caffeine. Changing drink navigates to that drink's page; size and milk updates the values below.
Showing: Short · Semi skimmed milk — 59 kcal
- Lowest calorie milk: almond drink (34 kcal, Tall)
- Caffeine increases at Venti size
- More keto-compatible for this size
- Whole milk is highest in saturated fat
Calorie Breakdown
Flat White Calories
The Flat White ranges from 34 kcal (Short, almond drink) to 76 kcal (Short, whole milk). Choosing almond drink with a Tall size is the most calorie-conscious option available.
How long to burn off 59 kcal
Based on a 70 kg adult. Updates with your selection above.
💡 To cut calories, choose almond drink or skimmed milk and go for a Tall. Switching from whole milk to almond drink on a Venti saves up to 42 kcal.
Keto Suitability
Is the Flat White Keto-Friendly?
Net carbs (carbohydrates minus fibre) at or below 12g is considered more keto-compatible. Values update as you change size and milk option above.
Net carbs for this combination are 5.7g — within the 12g keto threshold.
To reduce carbs:
- Choose almond drink — lowest net carbs among milk options
- Opt for Tall size to minimise total carb intake
- Ask for fewer syrup pumps to reduce sugar
- Consider black coffee or espresso-based drinks for strict keto
Caffeine Content
Flat White Caffeine & Metabolism
The Flat White contains caffeine from its base ingredients. Caffeine has a half-life of around 5–6 hours in most adults — meaning half the caffeine is still active several hours after drinking.
Caffeine metabolism & recommended drink time
Enter the time you plan to drink this. The chart shows how much caffeine remains in your system over the next 8 hours. Residual caffeine after 10 pm is linked to disrupted sleep quality.
Size Comparison
How Calories and Caffeine Change by Size
As cup size increases, so do calories, sugar, and caffeine. Reference: semi skimmed milk.
| Size | Calories | Sugar | Carbs | Fat | Protein | Caffeine |
|---|---|---|---|---|---|---|
| Short | 59 kcal | 5.1g | 6g | 2g | 4.2g | 89.1 mg |
Going from Short to Short adds 0 kcal and 0.0g sugar. Caffeine also increases at the largest size.
Milk Option Comparison
How Milk Choice Changes the Nutrition
Side-by-side comparison at Grande size across all milk options. Green = lowest calories, red = highest calories.
| Milk Option | Calories | Sugar | Fat | Sat Fat | Protein | Carbs |
|---|---|---|---|---|---|---|
| Semi skimmed milk | 59 kcal | 5.1g | 2g | 1.2g | 4.2g | 6g |
| Whole milk | 76 kcal | 5g | 4g | 2.5g | 4.1g | 5.8g |
| Skimmed milk | 46 kcal | 5.2g | 0.5g | 0.2g | 4.2g | 6.1g |
| Almond drink | 34 kcal | 2.7g | 1.4g | 0.2g | 0.9g | 3.5g |
| Soya drink | 51 kcal | 2.7g | 2.1g | 0.4g | 3.9g | 3.6g |
| Oat drink | 68 kcal | 3.5g | 3.3g | 0.4g | 1.2g | 7.9g |
| Coconut drink | 54 kcal | 3.9g | 2.8g | 2.5g | 1.5g | 4.7g |
Almond drink is lowest in calories; whole milk is highest in saturated fat. Soya drink offers the best protein among plant-based options. Oat drink provides the most dietary fibre.
FAQ
Flat White — Common Questions
The most relevant questions about calories, caffeine, keto suitability, and milk options for this drink.
The Flat White ranges from 34 kcal (Short, almond drink) to 76 kcal (Short, whole milk). A Short contains 59 kcal.
The lowest-calorie option is the Short with almond drink at 34 kcal. Choosing a smaller size and a plant-based milk significantly reduces total calories.
A Short contains 89.1 mg, and Short 89.1 mg of caffeine. This is classified as moderate caffeine.
The Short has 5.7g net carbs — within the typical 12g keto threshold, making it one of the more keto-compatible options. Almond drink reduces net carbs the most among milk options.