Daily Water Intake Calculator
Enter your weight to get a daily drinking goal, alongside the Korean adequate intake for your sex and age.
Water intake by body weight
A common rule of thumb is 30 ml per kg of body weight, rounded to 50 ml.
| Weight | Daily goal | 200 ml glasses |
|---|---|---|
| 40kg | 1.2L | 6 |
| 45kg | 1.35L | 7 |
| 50kg | 1.5L | 8 |
| 55kg | 1.65L | 8 |
| 60kg | 1.8L | 9 |
| 65kg | 1.95L | 10 |
| 70kg | 2.1L | 11 |
| 75kg | 2.25L | 11 |
| 80kg | 2.4L | 12 |
| 90kg | 2.7L | 14 |
| 100kg | 3L | 15 |
Korean adequate intake (2020)
Korea's 2020 Dietary Reference Intakes set total water for adults at 1,800–2,600 ml a day, of which about 900–1,200 ml comes from drinks and the rest from food. EFSA's figures are 2L for women and 2.5L for men, including food.
| Age | Men drinks | Men total | Women drinks | Women total |
|---|---|---|---|---|
| 19-29 | 1,200ml | 2,600ml | 1,000ml | 2,100ml |
| 30-49 | 1,200ml | 2,500ml | 1,000ml | 2,000ml |
| 50-64 | 1,000ml | 2,200ml | 1,000ml | 1,900ml |
| 65-74 | 1,000ml | 2,100ml | 900ml | 1,800ml |
| 75+ | 1,100ml | 2,100ml | 1,000ml | 1,800ml |
Sources
FAQ
How much water should I drink a day?
Korea's 2020 reference puts adult total water at 1.8–2.6 L, of which about 0.9–1.2 L comes from drinks; the rest comes from food.
Do I need 2 litres a day?
Not necessarily. Food supplies a large share of your water, and needs rise on hot days or when you exercise.
How much water for 60 kg?
About 1.8L a day using 30 ml per kg.