Programmatic reference
Water intake by body weight
Your body weight is the single biggest driver of how much water you need. Pick your exact weight below for a ready-made daily goal in litres and ounces — or jump straight to the full calculator to factor in activity and climate.
These pages use a baseline of about 0.5–0.75 oz of water per pound of body weight (30–40 ml per kg), then assume a moderately active day in a temperate climate. Each page shows the exact number for that weight, plus a chart, FAQ, and a live calculator to fine-tune it.
In pounds
- 100 lb1.8 L · 61 oz
- 110 lb1.9 L · 66 oz
- 120 lb2.1 L · 71 oz
- 130 lb2.2 L · 76 oz
- 140 lb2.4 L · 81 oz
- 150 lb2.5 L · 86 oz
- 160 lb2.7 L · 91 oz
- 170 lb2.8 L · 96 oz
- 180 lb3 L · 101 oz
- 190 lb3.1 L · 106 oz
- 200 lb3.3 L · 111 oz
- 210 lb3.4 L · 116 oz
- 220 lb3.6 L · 121 oz
- 230 lb3.7 L · 127 oz
- 240 lb3.9 L · 132 oz
- 250 lb4 L · 137 oz
- 260 lb4.2 L · 142 oz
- 270 lb4.3 L · 147 oz
- 280 lb4.5 L · 152 oz
- 290 lb4.6 L · 157 oz
- 300 lb4.8 L · 162 oz
In kilograms
- 40 kg1.6 L · 55 oz
- 45 kg1.8 L · 60 oz
- 50 kg2 L · 66 oz
- 55 kg2.1 L · 72 oz
- 60 kg2.3 L · 77 oz
- 65 kg2.4 L · 83 oz
- 70 kg2.6 L · 88 oz
- 75 kg2.8 L · 94 oz
- 80 kg2.9 L · 99 oz
- 85 kg3.1 L · 105 oz
- 90 kg3.3 L · 111 oz
- 95 kg3.4 L · 116 oz
- 100 kg3.6 L · 122 oz
- 105 kg3.8 L · 127 oz
- 110 kg3.9 L · 133 oz
- 115 kg4.1 L · 138 oz
- 120 kg4.3 L · 144 oz
- 125 kg4.4 L · 150 oz
- 130 kg4.6 L · 155 oz
Want the exact number?
Your weight is just the start. Add activity, climate, and life stage for a goal made for you.