Health & Fitness calculator
Water Intake Calculator
Calculate your recommended daily water intake.
About the water intake calculator
The water intake calculator estimates your recommended daily water consumption based on weight, activity, and climate.
How to use this calculator
- 1
Enter weight
Enter your weight in kilograms.
- 2
Choose activity and climate
Select your activity level and climate.
- 3
View results
See your recommended daily water intake.
How the calculation works
Base: 35 ml/kg. Add 500 ml for moderate activity, 1000 ml for very active. Add 500 ml for hot climate.
Example: 70 kg, moderate, normal climate: ≈ 2.95 L/day.
Important health disclaimers
These calculators provide estimates based on population averages. Individual results vary based on genetics, body composition, medical conditions, and medications. Always consult a healthcare provider before starting a new diet or exercise program, especially if you have underlying health conditions.
Understanding body composition metrics
BMI doesn't distinguish muscle from fat. Body fat % is more accurate but depends on measurement technique. TDEE varies day-to-day based on activity. Macro targets are starting points — adjust based on your results, energy levels, and goals. Hydration needs increase with exercise, heat, and altitude.
Important limitations
This tool provides a mathematical estimate based only on the values entered. It does not account for regulations, taxes, lender fees, market conditions, or individual circumstances. Results are for planning purposes only — consult a qualified professional for regulated, medical, financial, or construction decisions.
Frequently asked questions about water intake calculator
How accurate is the water intake calculator?+
The calculation follows the displayed formula and retains full numeric precision before formatting the result.
Can I use the result professionally?+
Use it as a planning estimate. Confirm regulated, medical, financial, or construction decisions with a qualified professional.