Guides
- How much water should I drink a day?
What official daily water references really measure: total water from drinks and food, why the numbers differ, and why there is no single figure for everyone.
- How to remember to drink water
Practical ways to stop forgetting to drink water: a visible bottle, tying a glass to things you already do, logging in one tap and gentle reminders that fit your day.
- Does coffee or tea count as water intake?
Coffee, tea and other drinks and your daily fluid: what the NHS says, what hydration studies found about moderate coffee, and where caution still applies.
- Drinking water in hot weather and during exercise
Why you may need more fluid in heat and during long activity, what public health agencies advise, the warning signs of dehydration, and why more is not always better.
- ml to oz: water bottle and glass sizes
Convert ml to US fluid ounces and back for water bottles and glasses: 250 ml, 330 ml, 500 ml, 750 ml, 1 litre, 8, 12, 16.9, 20 and 24 oz, and the UK ounce difference.
General information with sources, not medical advice.