Nutrition
Nutrition
Hydration
Water Intake Calculator
🧮 About this calculator
Estimates daily water needs. The classic 8 glasses a day rule is too low for most active adults. This calculator scales with bodyweight and adds extra for training.
Inputs
📘 Formula & explanation
Water (L) = weight(kg) * 0.035 + exercise_min * 0.012
Baseline: 35 mL per kg bodyweight per day. Add 350 mL for every 30 minutes of exercise.
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Apply this to your training
Use the result to pick or adjust a workout plan, or browse the exercise library.