There are 540 calories in a Small Shamrock Shake from McDonald's. Most of those calories come from carbohydrates (69%).
To burn the 540 calories in a Small Shamrock Shake, you would have to run for 47 minutes or walk for 77 minutes.
TIP: You could reduce your calorie intake by 40 calories by choosing the Child Size Shamrock Shake (500 calories) instead.
Let us know what you think! Review the nutrition facts above and then vote on whether you think a Small Shamrock Shake is healthy or not.
Allergy Information: a McDonald's Shamrock Shake contains milk. a McDonald's Shamrock Shake does not contain egg, fish, gluten, mustard, peanuts, sesame, shellfish, soy, tree nuts or wheat.*
* Please keep in mind that most fast food restaurants cannot guarantee that any product is free of allergens as they use shared equipment for prepping foods.
There are 26 Weight Watchers Freestyle Points, 26 WW SmartPoints and 15 WW PointsPlus in a serving of Small Shamrock Shake from McDonald's.
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