Loona Calculators
How much water should you drink each day? Enter your weight and how much you exercise to get a personalised daily target in litres — and in simple glasses.
A widely used guide: 35 ml per kilogram of body weight, plus about 350 ml for every 30 minutes of exercise.
All fluids and water-rich foods contribute something, but plain water is the easiest way to meet most of your target.
Yes, extreme amounts are harmful. Follow the guide, drink more in hot weather or heavy work, and let thirst guide you too.