How much water to drink by weight
Weight moves your daily amount more than anything else. Find yours in the chart, or use the calculator if you want height counted too.
| Weight | Male | Female |
|---|---|---|
| 50 kg (110 lb) | 1,750 ml | 1,550 ml |
| 55 kg (121 lb) | 1,950 ml | 1,700 ml |
| 60 kg (132 lb) | 2,100 ml | 1,850 ml |
| 65 kg (143 lb) | 2,300 ml | 2,000 ml |
| 70 kg (154 lb) | 2,450 ml | 2,150 ml |
| 75 kg (165 lb) | 2,650 ml | 2,350 ml |
| 80 kg (176 lb) | 2,800 ml | 2,500 ml |
| 85 kg (187 lb) | 3,000 ml | 2,500 ml |
| 90 kg (198 lb) | 3,150 ml | 2,500 ml |
| 95 kg (209 lb) | 3,200 ml | 2,500 ml |
| 100 kg (220 lb) | 3,200 ml | 2,500 ml |
How much water per kilogram
Drip takes 35 ml per kilogram for men and 31 ml for women. Then it adds 3 ml for every centimetre of height above 170, takes the same off for every centimetre below, and rounds to 50 ml.
How to read the chart
The chart is worked out for a height of 170 cm on an ordinary day. A man who is 180 cm and weighs 80 kg gets 2,850 ml instead of 2,800 ml.
Why the number stops growing
The formula has a ceiling: 3,200 ml for men and 2,500 ml for women. At 170 cm it starts at about 92 kg (203 lb) for men and 81 kg (179 lb) for women, so the last rows stop changing. At the other end the number never goes below 1,500 ml.
Workout days
On a workout day add 500 ml to the number in the chart. Drip does it with one switch.
Questions
How much water should I drink if I weigh 120 lb?
At 170 cm, about 1,900 ml a day for a man and 1,700 ml for a woman.
How much water should I drink if I weigh 150 lb?
At 170 cm, about 2,400 ml a day for a man and 2,100 ml for a woman.
How much water should I drink if I weigh 200 lb?
At 170 cm, about 3,200 ml a day for a man and 2,500 ml for a woman.
How do I work out water per kilogram of body weight?
Multiply your weight by 35 ml for a man or 31 ml for a woman.
Further reading
This is not medical advice. If you have kidney or heart problems, are pregnant or your doctor limits fluids, your doctor sets the amount.
