75 Soft Challenge Water Intake: How Much Water Per Day?
The 3-litre rule, in units you actually use
| Container | Size | Daily count for 3 L |
|---|---|---|
| Standard glass | 250 ml / 8 oz | 12 glasses |
| Small bottle | 500 ml / 17 oz | 6 bottles |
| Sports bottle | 750 ml / 25 oz | 4 bottles |
| 1-litre bottle | 1 L / 34 oz | 3 bottles |
For comparison, 75 Hard requires a full gallon (3.8 L). The 75 Soft target is deliberately achievable — 3 litres is close to what many health authorities suggest for active adults anyway.
The "half your body weight in ounces" variation
Some versions of 75 Soft scale water to your size: half your body weight (lbs) in ounces. At 150 lbs (68 kg) that's 75 oz (~2.2 L); at 200 lbs (91 kg) it's 100 oz (~3 L). If 3 litres feels like a lot for your body size, this variation is a legitimate choice — just pick one standard on day 1 and keep it.
How to actually drink 3 litres a day
- Front-load the morning. 500 ml (17 oz) on waking gets you 17% done before breakfast.
- Anchor water to habits. A glass before every meal and coffee adds ~1 L (34 oz) on autopilot.
- Carry one bottle everywhere. Knowing "4 refills = done" beats mental math.
- Cut off 2 hours before bed. Pacing matters — chugging a litre at 10 PM ruins your sleep and teaches you to dread the rule.
- Track each glass, not the day. Ticking off 12 small wins is psychologically easier than one big binary goal.
Track it in the free app
The app's water ring is split into 12 sub-steps — tap it each time you finish a glass and watch the ring close through the day. It's oddly satisfying, and it's the single most-used feature in the app.
What counts toward your water goal?
- Counts: still water, sparkling water, water with lemon/fruit infusions, electrolyte water.
- Doesn't count: coffee, tea, soda, juice, milk, protein shakes — they're fine to drink, they just don't reduce your 3 litres.
One caution: don't dramatically overshoot. More is not better — extreme water intake in short windows is dangerous. 3 litres spread over a day is a safe target for most healthy adults; if you have a medical condition affecting fluid balance, check with your doctor first.
Frequently asked questions
Does coffee count as water on the 75 Soft Challenge?
No — only water counts (still, sparkling, or fruit-infused). Coffee is allowed, it just doesn't count toward the 3 litres.
How many ounces is 3 litres of water?
About 101 oz — call it 12 standard glasses or four 750 ml bottles.
What if I can't finish my water before bed?
Do better tomorrow — no restart on 75 Soft. Front-load the morning so you're not staring at a full litre at 9 PM. See what to do when you miss a goal.
Start Your 75 Soft Challenge Today
The free 75 Soft Challenge Tracker comes with every rule pre-loaded, daily reminders, streaks and Forgiving Mode — everything you need to reach day 75.