Club Soda vs. Seltzer: Key Differences & Which to Choose
Club soda is carbonated water with added minerals—usually sodium bicarbonate or potassium sulfate—for a faint salty taste. Seltzer is plain carbonated water, nothing else. Both bubble, but only one carries minerals.
People swap them because they look and fizz alike, yet bartenders reach for club soda when a drink needs backbone and seltzer when it should stay neutral. A glass on the counter tells no story; the sip does.
Key Differences
Club soda’s minerals add subtle flavor and can enhance cocktails like a Tom Collins. Seltzer is flavor-neutral, making it ideal for flavored sparkling waters or when you simply want hydration without extras. Check the label: “minerals” means club soda.
Which One Should You Choose?
Making mocktails or cleaning your palate? Grab seltzer. Need a sturdier fizz for whiskey highballs or to settle an upset stomach? Pick club soda. Both are calorie-free; let taste and recipe decide.
Can I substitute one for the other in drinks?
Yes, but expect a slight mineral note if you use club soda in place of seltzer.
Does either have sugar or calories?
No—plain versions of both are zero-calorie and sugar-free unless flavoring is added.