💧 Water Intake Calculator for 90kg
How much water should you actually drink? Let's settle this.
Quick answer
At 90kg you should aim for around 3.15 litres of water a day — about 13 glasses (250 ml each).
- Daily target: 3.15 litres
- In glasses (250ml): ~13
- In pints: ~6
- Per hour waking (16h): ~197 ml
In detail: Water Intake Calculator for 90kg
A 90kg body needs roughly 3.15 litres of fluid intake per day — but "fluid intake" includes everything: tea, coffee, soft drinks, and the ~20% of your intake that typically comes from food. Plain water is a subset, not the whole target.
At this bodyweight, daily intake is at the higher end of typical recommendations. Spread it across the day rather than front-loading — your kidneys process a finite amount per hour.
Context matters: hot weather, exercise, breastfeeding, or illness can raise the target by 20–50%. The simplest check is urine colour — pale straw is ideal, darker than that suggests you're behind.
What this tool helps with
Your recommended daily water intake in litres
What you can enter
- Your weight (kg): 90
- Activity level: Sedentary
Why this page is useful
How much water should you actually drink? Let's settle this. This page loads fast, gives a direct answer, and then expands with useful context instead of burying the result under filler.