It depends on the type. Here are some examples based on nutritional info available on the McDonald's website.
For example:
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There are:210 calories in a McDonald's small size, 12 fluid oz, Strawberry Banana Fruit Smoothie (with low fat yogurt)180 calories in a McDonald's small size, 12 fluid oz, Strawberry Banana Fruit Smoothie (no yogurt)
There are 150 calories..
it depends on how much stuff and what stuff you put in the smoothie.
There is no exact "most amount of calories" item. A person can, in theory, make a smoothie of any calorie count they want. It all depends on the ingredients that go into it and how large or small it is.
There are 210 calories per 12-ounce serving of McDonald's strawberry banana smoothie.
460
310 calories.
about 180 calories
250 calories
260 calories
440 calories
On average, a 16 oz. smoothie would run about 250-350 calories, depending on the ingredients.