Everyone needs the same winter goal.
FactDaily fluid needs vary. The CDC describes differences with activity, age and other factors. A calculator with just a clock and a bottle log cannot set your target.
Have a goal and a bottle log already? See how much remains, even if your waking hours cross midnight. The counter compares your entries with the goal you choose.
Daily fluid needs vary. The CDC describes differences with activity, age and other factors. A calculator with just a clock and a bottle log cannot set your target.
The CDC includes other beverages and moisture in food. This counter only reflects the amounts you enter.
This page measures volume. Choose US fluid ounces or millilitres to match the markings on your container.
A 500 mL bottle that is still half full accounts for 250 mL consumed if it started full. Enter what you drank.
The mark is a straight-line arithmetic reference between the hours you enter. It cannot assess thirst or hydration.
The time window can cross midnight. Enter the start and end of your waking period in local time.
Enter your own goal, waking hours and logged amount. Switching units converts both amounts. Your entries reset when you reload.
The even-pace line is an arithmetic reference during your chosen hours. Follow any fluid guidance you have been given.
Fluid needs vary. Enter a personal goal if you already have one, and follow any fluid guidance from your clinician. This tool does not determine a goal.
It shows the fraction of your chosen hours that has elapsed, applied to your own goal. Being above or below that line is a mathematical comparison.
The counter still shows the amount left to your goal. It pauses the pace comparison until your selected window starts again.
No. Values stay in this browser tab and reset on reload. Nothing transfers to Dropkin.
Both the goal and the logged amount convert between millilitres and US fluid ounces. One US fluid ounce is approximately 29.5735 millilitres.
The iPhone app includes water logging, saved vessels, reminders, Hydration Pace and 30-day history for free. Optional Pro adds more appearance choices and longer history.



Dropkin: Water Reminder. Save your bottle, tap it when it is empty, see On pace or A little behind. Free, no account, no ads, offline. Reminders that stop at your goal.
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Open the public guide link