Health & Fitness Calculators

Water Intake Calculator

Estimate daily water needs in liters, milliliters, and glasses.

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Introduction

Hydration needs vary with body size, activity, and climate. This calculator starts from a common rule of thumb (about 35 ml per kg) and adjusts for activity and weather to suggest daily intake in liters, milliliters, and 250 ml glasses.

Benefits

  • Practical glass conversions
  • Climate-aware adjustments

Educational wellness tool only — not medical advice. Consult a qualified healthcare professional for personal decisions.

How It Works

  1. Enter weight
  2. Select activity and climate
  3. View recommended daily water intake

Formula Used

≈ 35 ml × body weight (kg) + activity & climate adjustments

Examples

Example: 70 kg, moderate activity, temperate → roughly 3.2 L/day.

Frequently Asked Questions

Does coffee count toward water intake?

Fluids contribute overall, but water remains the best default; individual advice may differ.