Calories in Starbucks Cortado with lactose-free milk match the standard order exactly at 49 calories, served in the same single small size as every other Cortado.
Since a Cortado is such a small, concentrated pour to begin with, there’s little room for milk choice to swing the calorie count much either way. Naming lactose-free here mainly guarantees the barista reaches for that carton specifically, which matters if you’re managing lactose intolerance.
Both low-fat and semi-skimmed milk versions land on this same number.
Cortado - lactose-free milk Nutrition Facts
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Cortado - lactose-free milk
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Long-Term Health Impact
After 1 Week
Drinking a daily Grande Cortado - lactose-free milk adds 343 calories to your week — about 66 minutes of brisk walking to offset.
After 1 Month
Over a month, that's 1470 calories — roughly 0.4 lb of potential weight gain if it isn't offset by activity.
After 1 Year
Over a year, a daily Grande Cortado - lactose-free milk totals 17885 calories and 1.6kg of sugar — equivalent to about 179 miles of jogging to burn off.

