There are 566 calories in Medium Onion Rings from Fuddruckers. Most of those calories come from carbohydrates (100%).
To burn the 566 calories in Medium Onion Rings, you would have to run for 50 minutes or walk for 81 minutes.
TIP: You could reduce your calorie intake by 189 calories by choosing the Small Onion Rings (377 calories) instead.
Let us know what you think! Review the nutrition facts above and then vote on whether you think Medium Onion Rings is healthy or not.
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