What this tool does
Staying properly hydrated supports your energy, focus and overall wellbeing, but the right amount varies from person to person. This calculator gives a personalised daily water target based on your body weight, so you have a clear number to aim for instead of vague advice.
How to use this tool
- Enter your body weight.
- Read your suggested daily water intake.
- Adjust upward on hot days or during exercise.
- Spread your intake evenly through the day.
Why it matters
Mild dehydration can quietly affect concentration, mood and physical performance. A concrete daily target makes it far easier to build a healthy habit and notice when you are falling short, especially in hot weather or during sport.