How many calories are in sparkling water?

Plain sparkling water has 0 calories, whether it's a 12 oz can or a full liter. It is water plus carbon dioxide, with 0g of sugar, carbs, and fat. Unsweetened flavored versions typically stay at 0-5 calories per can.

Sparkling water vs soda: how many calories do I save?

Regular soda has about 43 calories per 100g, so a 12 oz can carries roughly 155 calories and 39g of sugar. Swapping one daily can of soda for sparkling water saves about 1,085 calories a week, enough to matter for weight over a year.

Does sparkling water break a fast?

No. With 0 calories, 0g carbs, and 0g protein, plain sparkling water triggers no meaningful insulin response and is allowed on virtually every fasting protocol. Just check flavored brands for added sugar or juice, which would change the answer.

Is sparkling water as hydrating as still water?

Yes. Studies show carbonated water hydrates as effectively as flat water, and it counts fully toward daily fluid goals. The bubbles can make you feel full slightly sooner, which is why some people find it easier to drink still water in large volumes.

Is sparkling water keto-friendly?

Completely. Plain sparkling water has 0g net carbs, making it one of the few flavor-forward drinks with no keto budget impact at all. Unsweetened flavor essences add zero carbs; anything listing cane sugar or juice concentrate does not qualify.

Is sparkling water bad for your teeth?

Only mildly. Carbonation makes sparkling water slightly acidic (around pH 5) versus still water at pH 7, but it is far gentler than colas, which sit near pH 2.5 with sugar on top. Plain sparkling water causes minimal enamel erosion in dental studies.

Sparkling water vs tonic water: what's the difference?

Tonic water is sweetened, at 34 calories per 100g, so a 12 oz serving costs about 122 calories, almost as much as soda. Club soda and seltzer are 0 calories; club soda just adds minerals like the 21mg of sodium per 100g in this profile.

Can sparkling water help with weight loss?

It helps indirectly. At 0 calories it replaces caloric drinks one-for-one, and the carbonation gives a satisfying, snack-adjacent feel; each soda it replaces saves about 155 calories. Some small studies also suggest fizzy water briefly increases fullness before meals.