Does it count?
Does beer count as water?
Quick answer
Beer is mostly water (about 90%), but the alcohol in it is a diuretic, so a typical 5% beer is roughly a wash for hydration — and stronger beers are net dehydrating. A very low-alcohol or alcohol-free beer (under 0.5%) does count toward your water, which is why non-alcoholic beer is a popular sports recovery drink.
The short answer
Mostly no (alcohol dehydrates)
Regular beer roughly cancels out; alcohol-free beer counts.
The water in beer is real, but ethanol is a diuretic — it suppresses a hormone (vasopressin) that tells your kidneys to hold onto water, so you lose more fluid in urine than the beer provides. The lower the alcohol content, the closer a beer gets to actually hydrating you.
A 1 bottle (355 ml) of this drink is roughly 90% water. 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 bottle (355 ml) | 90% | — |
| 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
For hydration, stick to water or alcohol-free beer. Regular beer won't help you reach your water goal.
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 non-alcoholic beer hydrate you?
Yes. Alcohol-free (0.0–0.5%) beer contains electrolytes and carbohydrates and hydrates almost as well as a sports drink, which is why many athletes reach for it after exercise.
Why does alcohol dehydrate you?
Alcohol suppresses vasopressin (anti-diuretic hormone), the signal that tells your kidneys to reabsorb water. With less vasopressin, your kidneys release more water as urine, so you lose more fluid than the drink provided.
Does a glass of water per beer prevent dehydration?
Drinking a glass of water between alcoholic drinks slows your intake and helps replace fluid, but it doesn't fully cancel the diuretic effect of the alcohol. It's a harm-reduction habit, not a cure.
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.