Log every glass, mug and bottle with one tap and watch your daily goal ring fill up. Turn on reminders to get a nudge every hour while the page is open, and check your 7 and 30-day history to see how consistent you are. Everything is saved in your browser only.
Last updated:
0%0 of 64 fl oz
fl oz
Today's log
Advertisement
Advertisement
How to use the Water Intake Tracker
Set your units and daily goal. 64 fl oz (about 1.9 L) or 2,000 ml is filled in to start; use the water intake calculator for a personal estimate.
Tap a drink each time you finish one: small glass, mug, bottle or big bottle. For other sizes, type a custom amount and press Add.
Fix mistakes with Undo last, or Remove next to any drink in today's log.
Turn on reminders, choose how often and your active hours, and allow notifications if your browser asks. Keep this tab open.
Check your history for the last 7 or 30 days and download it as CSV if you want to keep a record.
Common drink sizes
Conversion: 1 US fluid ounce = 29.5735 ml; 1 liter = 33.814 US fl oz.
Container
US fl oz
Milliliters
Share of a 64 fl oz goal
Small glass / standard "cup"
8
237
12.5%
Coffee mug
12
355
19%
Can
12
355
19%
Standard water bottle
16.9
500
26%
Sports bottle
24
710
37.5%
Large bottle
32
946
50%
1-liter bottle
33.8
1,000
53%
Reference daily intakes
Adequate intakes of total water (from drinks and food) set by the U.S. National Academies (2004), with the part they expect to come from beverages.
Group
Total water per day
From beverages
Men 19+
3.7 L (125 fl oz)
3.0 L (101 fl oz)
Women 19+
2.7 L (91 fl oz)
2.2 L (74 fl oz)
Pregnancy
3.0 L (101 fl oz)
2.3 L (78 fl oz)
Breastfeeding
3.8 L (128 fl oz)
3.1 L (105 fl oz)
These are population averages for healthy adults, not personal prescriptions. Hot weather, exercise and illness raise needs; some medical conditions require limiting fluids. Follow your doctor's advice if you have been given a fluid target.
Tips to drink more water
Anchor it to habits: a glass when you wake up, with every meal and after brushing your teeth adds up to four or more glasses without thinking.
Keep a bottle in sight on your desk or in your bag; using the same bottle makes logging one tap.
Front-load the day so you are not drinking a lot right before bed.
Use reminders wisely: every 60-90 minutes during your active hours is usually enough; tap a drink right after each reminder so the timer resets.
Check the color: pale yellow urine generally means you are well hydrated; dark yellow suggests you need more.
Frequently asked questions
How much water should I drink a day?
There is no single number for everyone. The U.S. National Academies of Sciences, Engineering, and Medicine set an adequate intake of about 3.7 liters (125 fl oz) of total water a day for men and about 2.7 liters (91 fl oz) for women, from all drinks and food. Roughly 20% usually comes from food, so drinks make up the rest. Needs rise with heat, exercise, pregnancy and breastfeeding. Ask a doctor for advice if you have heart or kidney conditions.
Is "8 glasses a day" right?
Eight 8-ounce glasses (64 fl oz, about 1.9 liters) is an easy-to-remember starting goal rather than a scientific rule. Many people need more, especially in hot weather or when active, and some need less. That is why the tool starts at 64 fl oz or 2,000 ml but lets you set any goal.
Do coffee, tea and other drinks count?
Most drinks contribute to your daily fluid intake, including milk, juice, tea and coffee; the mild diuretic effect of caffeine in moderate amounts does not cancel out the water. Whether you log only plain water or all drinks is up to you; just be consistent so your history is comparable.
How do the reminders work?
While this page is open, even in a background tab, the tracker checks every 20 seconds. If you are within your active hours and have not logged a drink or had a reminder for the chosen interval, it shows a browser notification (if you allowed them) or an on-page alert, and plays a soft chime if that option is on. Reminders cannot run after you close the tab, and some phones pause pages when the screen locks.
How are fluid ounces and milliliters converted?
One US fluid ounce is 29.5735 ml, so 8 fl oz is about 237 ml, a 16.9 fl oz bottle is 500 ml and 64 fl oz is about 1.89 liters. The tracker stores every drink in milliliters and converts for display, so switching units never changes your totals.
Where is my data stored?
In your browser's local storage on this device only. Nothing is uploaded and there is no account. Clearing your browser data or using a private window removes the history; download the CSV if you want to keep a copy. About a year of history is kept.
Can I drink too much water?
It is rare in healthy people, but drinking very large amounts in a short time can dilute blood sodium (hyponatremia), which is a risk mainly during long endurance events. Spread drinks through the day, let thirst guide you, and do not force yourself far beyond your goal.
Are all the tools on FreeToolCabin tested for quality and accuracy?
Yes! Every tool on our site undergoes automated Q/A testing in real browser environments to ensure high precision, correct output, and zero errors. If you happen to spot a bug or have a suggestion, please contact us at [email protected] and our team will review it right away.