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Daily Water Intake Body Weight Calculator

Water (L) ≈ weight × 0.033 + activity_adjustment.

Calculates recommended daily water intake from body weight and physical activity level using the standard hydration reference formula.

Nadia Almasri By Nadia Almasri
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

Water_L = weight_kg × 0.033 + exercise_hours × 0.35

In depth

Calculates recommended daily water intake from body weight and physical activity level using the standard hydration reference formula.