Sonic Drive-In offers a variety of zero-calorie drinks for those looking to enjoy a refreshing beverage without extra sugar or calories. Whether you prefer diet sodas, unsweetened teas, or sugar-free limeades, Sonic has plenty of delicious, calorie-free options. If you’re searching for the best zero-calorie Sonic drinks, here’s everything you need to know!
What Are Zero Calorie Sonic Drinks?
Zero-calorie Sonic drinks contain no sugar and no calories, making them great for anyone on a keto, diabetic, or weight-loss-friendly diet. These drinks include diet sodas, unsweetened teas, and custom sugar-free beverages.
Best Zero Calorie Sonic Sodas
Sonic offers several diet sodas that deliver great flavor without the calories.
| Drink Name | Why It’s a Great Zero-Calorie Choice |
| Diet Coke | Classic cola taste with zero calories. |
| Coke Zero Sugar | More like regular Coke but without the sugar or calories. |
| Sprite Zero | Crisp and refreshing lemon-lime soda with no sugar. |
| Diet Dr. Pepper | The bold Dr. Pepper flavor with zero calories. |
| Diet Cherry Limeade | A sugar-free version of Sonic’s most famous drink. |
Best Zero Calorie Sonic Teas & Lemonades
For a light and refreshing option, Sonic has zero-calorie teas that pair well with fresh fruit add-ins.
| Drink Name | Type | Why It’s a Great Choice |
| Unsweetened Iced Tea | Black Tea | A crisp, naturally zero-calorie tea. |
| Unsweetened Green Tea | Green Tea | A light, antioxidant-rich option. |
| Diet Cherry Limeade | Limeade | A sugar-free take on Sonic’s signature drink. |
| Sugar-Free Lemonade | Lemonade | A tart and refreshing choice with no added sugar. |
Best Zero Calorie Sonic Slush Options
While most Sonic slushes contain sugar, you can customize your order to create a zero-calorie slush.
| Slush Option | How to Order It Zero-Calorie |
| Plain Ice Slush | A neutral base you can add zero-calorie flavors to. |
| Diet Cherry Limeade Slush | Use Diet Cherry Limeade as the base. |
| Sprite Zero Slush | Ask for Sprite Zero blended into a slush. |
| Powerade Zero Slush | Some locations may offer a sugar-free Powerade base. |
How to Customize Your Zero Calorie Sonic Drink
Even with zero-calorie drinks, you can still customize your beverage to enhance the flavor.
Zero-Calorie Flavor Add-Ins
- Cherry (Diet Cherry Limeade base)
- Vanilla (Sugar-free version available at some locations)
- Lime (Fresh lime, naturally sugar-free)
- Coconut (Unsweetened version)
- Peach (May be available in sugar-free form)
Extra Mix-Ins (No Calories)
- Fresh fruit slices (Lemon, Lime, Cherry)
- Ice blend for a thicker texture (slush-style)
- Extra carbonation (for sodas)
Are Zero Calorie Sonic Drinks Included in Happy Hour?
Yes! During Sonic Happy Hour (2 PM – 4 PM) and through the Sonic App, you can get 50% off zero-calorie drinks like Diet Cherry Limeade, Unsweetened Iced Tea, and Diet Sodas.
Zero Calorie Drinks vs. Regular Sonic Drinks
Wondering how zero-calorie drinks compare to Sonic’s regular beverages? Here’s a quick breakdown.
| Drink Type | Regular Version | Zero Calorie Version |
| Limeade | Cherry Limeade | Diet Cherry Limeade |
| Soda | Coca-Cola | Coke Zero Sugar |
| Tea | Sweet Tea | Unsweetened Iced Tea |
| Slush | Blue Raspberry Slush | Custom Diet Slush |
How Do Sonic’s Zero Calorie Drinks Compare to Other Fast-Food Chains?
Sonic offers more zero-calorie drink choices than most fast-food restaurants.
| Fast-Food Chain | Zero Calorie Drink Options? |
| Sonic Drive-In | Yes (Diet sodas, sugar-free limeades, teas) |
| McDonald’s | Limited (Diet Coke, Unsweet Tea) |
| Starbucks | Yes (Iced Teas & Sugar-Free Syrups) |
| Dairy Queen | No (Mostly sweetened beverages) |
FAQs
What is the best zero-calorie drink at Sonic?
The Diet Cherry Limeade and Unsweetened Iced Tea are two of the most popular options.
Does Sonic have a sugar-free slush?
Yes! You can request a custom sugar-free slush at some locations by asking for a diet syrup base.
Can I customize my zero-calorie Sonic drink?
Yes! Add fresh fruit, extra ice, or sugar-free flavor add-ins to make your drink unique.
Are zero-calorie drinks included in Sonic’s Happy Hour?
Yes! You can get half-price diet sodas, teas, and limeades during Happy Hour.
Which Sonic drink has the least calories?
The Unsweetened Iced Tea, Diet Cherry Limeade, and Coke Zero Sugar all have zero calories.
