This pasta dish tastes rich and flavourful, but is also fairly low in calories. If you're on a diet of between 1200â1500 calories a day, you can enjoy a low-calorie breakfast and lunch as well as this carbonara for dinner. Each serving provides 393 kcal, 18.5g protein, 43g carbohydrates (of which 5g sugars), 15g fat (of which 6.5g saturates), 6g fibre and 0.9g salt.