Water Intake Calculator
A practical starting range from weight (35 ml/kg baseline), bumped for activity, heat, pregnancy or breastfeeding, and optional extras — not a medical prescription.
Inputs
Results
≈ 0 cups (250 ml each)
Rough daytime split (example)
Hydration context
Thirst, urine colour, and activity matter. “8 glasses” is not universal — needs scale with size, sweat, and environment. In India, safe drinking water (boiling, RO maintenance, storage hygiene) matters as much as volume.
Frequently asked questions
Is the “eight glasses” rule universal?
No. Needs scale with body size, sweat loss, heat, illness, and diet fluid. This calculator uses a weight-based baseline then bumps for the factors you select.
Do pregnancy or breastfeeding increase needs?
Often yes. The page adds optional increments when those modes are selected—still confirm with your clinician.
Why adjust for caffeine or alcohol?
They can influence short-term fluid balance; the toggles add a small illustrative buffer, not a precise pharmacology model.
Can I drink too much water?
Rarely, excessive fluid without medical indication can dilute electrolytes. Use common sense and professional advice if you have kidney or heart conditions.
Does this page track bottles for me?
It suggests totals and a simple hourly pattern list where shown, but logging is up to you.
Are my weight and settings uploaded?
No. Math runs locally in JavaScript.