Does it count?
Does soda count as water?
Quick answer
Soda is mostly water, so technically it counts toward your daily fluid. But regular soda is loaded with added sugar (about 39 g per 12 oz can), which adds empty calories and isn't a smart hydration choice. Diet and sugar-free sodas hydrate almost as well as water, since the water content is nearly the same.
The short answer
Technically yes — but…
Counts as fluid, but the sugar makes it a poor hydrator.
Soft drinks are around 90% water, so they do contribute to your fluid intake. The issue isn't the water — it's everything else. Regular soda brings a large dose of sugar, diet soda brings artificial sweeteners, and both can carry caffeine. As an occasional drink they're fine; as your main hydrator, they're not.
A 1 can (355 ml) of this drink is roughly 90% water and contains about 35 mg of caffeine. So in fluid terms, it contributes meaningfully to your day — but the other ingredients matter too. The numbers below compare it to a few other common drinks.
| Serving | Water content | Caffeine |
|---|---|---|
| 1 can (355 ml) | 90% | 35 mg |
| 1 cup (240 ml) (coffee) | 98% | 95 mg |
| 1 glass (240 ml) (milk) | 87% | — |
| 1 mug (240 ml) (tea) | 99% | 40 mg |
The bottom line
Reach for water, sparkling water, or unsweetened tea most of the time. Soda works in a pinch but isn't a daily hydrator.
Whatever drinks you choose, the goal is the same: hit your total daily fluid target, mostly from water. Use the calculator to find that number for your body.
Find your daily water goal
Now you know what counts — see how much you actually need based on your weight, activity, and climate.
Frequently asked
Does diet soda count as water?
Yes. Diet and sugar-free sodas are essentially carbonated water with flavourings and sweeteners, so they hydrate nearly as well as plain water. They don't bring the calories or sugar of regular soda.
Is soda ever dehydrating?
Not in any practical sense. The caffeine in some colas is a mild diuretic, but the fluid in the can more than offsets it. The real problem with regular soda is the sugar load, not dehydration.
Does sparkling water count as water?
Yes — sparkling water is just water with dissolved carbon dioxide, so it counts fully toward your daily intake. Some people find the bubbles mildly filling, which can help or hinder depending on how much you enjoy it.
Sources
- 1.U.S. National Academies (IOM/NAM), 2005 — Adequate total water intake of about 3.7 L/day for men and 2.7 L/day for women, including water from food and all beverages.
- 2.Mayo Clinic — General guidance of roughly 2.7–3.7 L of total fluids a day, with thirst and pale-yellow urine as everyday checks.