How much water should I drink per day?

The general guideline is 2–3 litres per day, but the right amount depends on your body weight, activity level, and climate. Use the calculator for a personalised recommendation.

Does coffee or tea count toward daily water intake?

Caffeinated drinks have a mild diuretic effect, but moderate consumption of coffee and tea still contributes to hydration. Water and non-caffeinated drinks are the best sources.

Should I drink more water when exercising?

Yes. Sweating during exercise increases fluid loss significantly. Drink 250–500ml of water before exercise, and 150–250ml every 15–20 minutes during exercise.

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Daily Water Intake Calculator

Calculate how much water you should drink daily based on weight, activity level, and climate. Get a personalised hourly schedule.

Body Weight

Activity Level

Climate

These are general guidelines. Increase intake when exercising, in hot weather, or if pregnant/breastfeeding. Individual hydration needs vary.

How to Use Daily Water Intake Calculator

1
Enter your body weight in kg or lbs.
2
Select your activity level from Sedentary to Athlete.
3
Choose your climate (Temperate, Hot & Humid, or Cold & Dry).
4
View your daily water goal in litres, glasses, and bottle counts.
5
Follow the hourly drinking schedule for optimal hydration throughout the day.

About Daily Water Intake Calculator

The Daily Water Intake Calculator gives you a personalised daily water goal based on your body weight, activity level, and climate. Proper hydration is essential for energy, concentration, digestion, and overall health.

How Much Water Do You Need?

The base formula is weight (kg) × 0.033 litres. However, this is adjusted upward for physical activity and hot/humid climates, which increase fluid loss through sweat. A sedentary person in a temperate climate needs less water than an athlete training in a hot environment.

Hourly Drinking Schedule

Rather than drinking large amounts infrequently, spreading water intake throughout the day is healthier for digestion and kidneys. The calculator generates a personalised hourly schedule from 7am to 11pm based on your daily target.