How much caffeine is in Diet Barq's root beer?

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Diet Barq's root beer is caffeine-free: 0mg per 12 oz can, per Caffeine Informer. There is no per-ounce math to do because there is nothing to measure. If you are tracking caffeine, Diet Barq's root beer is a true zero, which puts it in a different category from even the mildest caffeinated sodas.

Diet Barq's root beer vs coffee and espresso

Why it has no caffeine

Caffeine in soda is an additive, not something inherent to carbonated drinks, and plenty of formulas simply leave it out. Diet Barq's root beer is one of them: the published figure is a flat zero. The practical upshot is that it works as an evening drink or a caffeine-cutback swap where a cola would keep the count climbing.

The mistake to avoid is reading caffeine-free as a blanket health claim. It says nothing about anything else on the label; it only means the drink adds 0mg to your daily caffeine total.

Where to find it

Check Diet Barq's root beer prices on Amazon

Compare it

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For context, the FDA cites 400mg of caffeine a day as an amount generally not associated with negative effects in healthy adults. Tolerance and health vary, so treat these numbers as information, not advice.

FAQ

Is Diet Barq's root beer caffeine-free? Yes. Diet Barq's root beer has 0mg of caffeine per 12 oz can, per Caffeine Informer.

How much caffeine is in Diet Barq's root beer compared to coffee? None. Diet Barq's root beer has 0mg; an 8 oz cup of brewed coffee averages 95mg and a 1 oz shot of espresso 63mg.

Can Diet Barq's root beer count toward the 400mg daily caffeine reference? No. With 0mg of caffeine, Diet Barq's root beer never adds to your daily total no matter how many you drink.

Sources: the Diet Barq's root beer figure (0mg per 12 oz can) is Caffeine Informer / Coca-Cola brand data (source). Brewed coffee (95mg per 8 oz) and espresso (63mg per 1 oz) reference values are from USDA FoodData Central (source).