Hydration Timer OnlineFree hydration timer to remind you to drink water regularly. Hourly countdown with alarm to maintain proper hydration throughout the day.Frequently asked questionsHow often should I set a hydration timer to drink water?Every 60–90 minutes is a practical reminder frequency for desk workers. This prompts 7–9 drinking moments across a 9-hour workday — consistent with the recommendation of 2–3 liters (8–13 cups) per day. Set shorter intervals (30 min) on hot days or during exercise.How much water should I drink each time the hydration timer sounds?Aim for 8–16oz (240–480ml) per reminder. This is roughly one glass or half a standard water bottle. You don't need to drink the entire amount immediately — the alarm is a cue to drink something, not a mandatory dose. Listen to your thirst alongside the timer.Does coffee or tea count toward my hydration goal?Yes — caffeinated beverages are mildly diuretic but still contribute net fluid to your daily intake. Modern research shows the diuretic effect of moderate caffeine is minimal. Coffee, tea, and sparkling water all count. Pure water is still optimal, but total fluid from all sources matters.How do I know if I'm properly hydrated without tracking every ounce?Urine color is the simplest indicator: pale yellow (lemonade color) = well hydrated. Dark yellow = drink more. Clear = possibly over-hydrated (rare but can dilute electrolytes). Use the timer to prompt regular drinking and use urine color as a daily feedback check.Should I drink more water during workouts and how does that change the timer?During exercise: drink 7–10oz every 15–20 minutes (set the timer shorter). After intense exercise lasting over 60 minutes, add electrolytes — plain water alone can dilute sodium and cause cramping. On workout days, total daily intake should increase by 16–32oz above your baseline.