How Much Water Do You Need? Hydration Tips and Guidelines
Maintaining proper hydration is essential for your physical health, energy, mental clarity, digestion, circulation, athletic performance and recovery. Even mild dehydration can lead to fatigue, headaches, poor concentration and reduced physical output.
How much water do you need?
General guidelines
| Life stage | Average daily water intake* |
|---|---|
| Adults | 2–2.5 litres (approx. 8–10 cups) |
| Active adults | 3–3.5 litres |
| During exercise | 500 ml 1–2 hours before + 150–250 ml every 20 mins during |
*Includes water from food and other beverages.
Drink water regularly
Aim for 2–2.5 litres daily, adjusting for body size, activity level, and climate. Sip steadily throughout the day rather than waiting until you’re thirsty.
Diet and lifestyle tips
Start your day with water
Have a glass of water first thing in the morning to rehydrate after overnight fasting.
Carry a reusable water bottle
Carry a refillable water bottle – make it a habit to keep it within reach at all times.
Set reminders
Use hydration tracking apps, phone alarms or bottle markers to remind you to drink every hour.
Avoid waiting until you’re thirsty
Sip regularly and aim to drink before you feel thirsty. Thirst is a late sign of dehydration, especially in older adults.
Monitor urine colour
Urine colour should be pale yellow or clear, which indicates good hydration; dark yellow or amber suggests you need more fluids.
Urine colour scale: Very Good · Good · Fair · Lightly Dehydrated · Dehydrated · Very Dehydrated · Severely Dehydrated
Include hydrating foods
Add water-rich fruits and vegetables to your meals, including cucumber, watermelon, strawberries, lettuce, celery, tomatoes, courgette, oranges and grapefruit. Yoghurt is also water-rich.
| Food | Water content |
|---|---|
| Cucumber | 96% |
| Lettuce | 95% |
| Watermelon | 92% |
| Strawberries | 91% |
| Tomatoes | 94% |
| Celery | 95% |
| Oranges | 87% |
| Yoghurt | 85% |
Flavour water naturally
If plain water is unappealing, infuse it with slices of citrus fruits, berries, cucumber, or herbs like mint.
Create a hydration habit stack
Link drinking water with existing habits (e.g. drink a glass after brushing teeth, before each meal, or when checking emails).
Balance electrolytes
Sodium, potassium, magnesium, and calcium help your body retain water properly. Include sources like coconut water, bananas, spinach, sweet potatoes, nuts and seeds.
Adjust for environment
In hot weather or heated indoor environments, increase water intake. Cold, dry air can also increase water loss through respiration.
Limit dehydrating beverages
Cut back on high-caffeine drinks (coffee, energy drinks), especially in large quantities. Avoid or moderate alcohol intake, which is dehydrating.
Soups, smoothies, and herbal teas
All count toward your fluid intake and offer variety, especially in colder weather.
Hydration and exercise
Hydrate before, during, and after exercise
This is especially important for intense or long-duration activity.
Before exercise
- Drink 500ml of water 1-2 hours before activity.
- Add electrolytes.
During exercise
- Drink 150-250ml every 15-20 minutes, especially in hot conditions.
- For workouts more than 60 minutes, consume electrolytes.
After exercise
- Rehydrate with 1.5x the lost fluid (check weight before/after exercise if needed).
- Include potassium-rich foods (e.g. banana, avocado) and sodium (e.g. broth, miso soup) to replace lost electrolytes.
Hydration isn’t just for athletes – it’s essential for everyone. If you’re active, outdoors, or under stress, drink more than you think you need.