Daily Water Intake Calculator

What this calculator does

This calculator estimates how much water you should drink every day using:

• body weight
• climate
• activity level

You get a recommendation in:

• liters per day
• milliliters per day
• 250 ml glasses per day

Formula Used

$$baseMl = weightKg \times 35$$ $$climateAdjustedMl = baseMl \times climateFactor$$ $$totalMl = climateAdjustedMl + activityMinutes \times 12$$

Where:

• climateFactor = 0.95 (cold), 1.0 (moderate), 1.12 (hot)
• each active minute adds 12 ml

Example

For a 70 kg person, hot climate, and 45 minutes of activity:

$$baseMl = 70 \times 35 = 2450$$ $$climateAdjustedMl = 2450 \times 1.12 = 2744$$ $$totalMl = 2744 + 45 \times 12 = 3284$$

So recommended intake is about:

• 3.28 liters/day
• 3284 ml/day
• 13 glasses/day (250 ml each)

Notes

• This is a general wellness estimate and not medical advice.
• Pregnant people, athletes, and people with medical conditions may need custom hydration guidance.