Daily Water Intake Calculator
Estimate your daily water needs from body weight and exercise — in litres, ml and cups.
Litres / day
3 L
Millilitres
2,975 ml
≈ 250 ml cups
12
Formula
≈ 35 ml per kg body weight + 500–1000 ml per hour of exerciseHow to use the Daily Water Intake Calculator
- 1Enter your weight
- 2Enter daily exercise minutes
- 3See your target in litres and cups
Frequently Asked Questions
How much water should I drink per day?
A common baseline is about 35 ml per kg of body weight — around 2.7 L for a 75 kg adult — plus more for exercise and heat.
Does coffee count?
Yes — despite mild diuretic effect, coffee and tea contribute to daily fluid intake. Food provides another ~20%.