There are 790 calories in a Large Shamrock Shake from McDonald's. Most of those calories come from carbohydrates (66%).
To burn the 790 calories in a Large Shamrock Shake, you would have to run for 69 minutes or walk for 113 minutes.
TIP: You could reduce your calorie intake by 230 calories by choosing the Medium Shamrock Shake (560 calories) instead.
There are 40 Weight Watchers Freestyle Points, 40 WW SmartPoints and 21 WW PointsPlus in a serving of Large Shamrock Shake from McDonald's.
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