Water Intake Calculator – Daily Hydration Needs

Find out how much water you should drink daily based on your body, climate, diet and activity level. Stay hydrated with accurate results.

Water Intake Calculator — Vitaroxi
Vitaroxi — Nutrition & Fitness Calculator
Water Intake
Calculator
Personalized daily hydration based on your body & lifestyle
1
Body Stats
70
30
2
Lifestyle & Environment
✓
Your Daily Target
Daily target
—
Litres per day
In millilitres
—
ml / day
Fluid ounces
—
fl oz / day
Cups (240 ml)
—
cups / day
Breakdown
Base
—
Activity
—
Climate+
—
🕐
Suggested Drinking Schedule
⚡
Factors & Personalised Tip
Adjustments applied
About this calculation: Based on the IOM weight-per-kilogram baseline (35 ml/kg/day), adjusted for sex, age, activity, climate, diet, health conditions, and caffeine. ~20% of daily hydration comes from food sources.
Formula: IOM baseline (35 ml/kg/day) adjusted for sex, age, activity, climate, diet, and health  |  Not medical advice — consult a healthcare professional for personalised guidance.
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Why Is Water Important?

Water is essential for:

  • Transporting nutrients and oxygen to cells
  • Regulating body temperature
  • Supporting metabolism and digestion
  • Removing toxins from the body
  • Keeping joints lubricated and skin healthy

Even mild dehydration can cause fatigue, headaches, and poor concentration — so knowing your daily water needs is vital.

How This Calculator Works

The calculator estimates your daily water requirement (in liters or ounces) based on:

  1. Body Weight – Heavier individuals need more water.
  2. Activity Level – Physical activity increases fluid loss through sweat.
  3. Climate – Hotter or humid regions require more hydration.
  4. Gender and Age – Body composition and metabolic rate affect water needs.

You can choose Auto Mode for quick results or Manual Mode for personalized adjustment.

Recommended Daily Water Intake

Activity LevelRecommended Intake
Low (Sedentary)30–35 ml per kg body weight
Moderate35–40 ml per kg body weight
High (Active/Outdoor Work)40–50 ml per kg body weight

Example:
If you weigh 70 kg, you need around 2.5 to 3 liters per day, depending on your lifestyle and environment.

How to Use the Water Intake Calculator

  1. Enter your weight, age, gender, and activity level.
  2. Select your preferred unit (liters, milliliters, or ounces).
  3. Click “Calculate” to see your daily recommended intake.
  4. Optionally, download or print your hydration summary.

Hydration Tips

  • Start your day with a glass of water before breakfast.
  • Drink small amounts frequently instead of large gulps.
  • Increase intake during hot weather or exercise.
  • Add fruits like cucumber, lemon, or mint for flavor.
  • Limit sugary drinks and excessive caffeine.

FAQ

How much water should I drink daily?

Most adults need 2–3 liters per day, but it varies based on body weight and activity.

Yes — excessive intake can dilute electrolytes, so stick to the recommended range.

They contribute, but pure water is still the healthiest and most hydrating option.

Yes — it factors in activity level to adjust for sweat and fluid loss.

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