💧 Water Intake Calculator
How It Works
Estimate daily water intake using body weight and a simple weight-based guideline. Use Water Intake Calculator as a general estimate from the measurements and assumptions you enter.
The result is most useful when the inputs match the definitions used by this calculator. For this tool, the underlying method is: Water ≈ Body Weight × 35 mL/kg. Compare the output with the worked example, then change one meaningful input at a time to see how the result responds.
Understanding Water Intake
Water Intake is a general health or fitness estimate based on the measurements and assumptions requested by the calculator. Health estimates are not diagnoses and can differ from an individual's actual needs or measurements. Review the water intake inputs and units before relying on the result.
When to Use This Calculator
Use Water Intake Calculator as a general estimate from the measurements and assumptions you enter.
Practical tip: For this Water Intake Calculator, use the result as a starting estimate and change one measurement or activity assumption at a time so you can see how sensitive the estimate is.
Formula
Water ≈ Body Weight × 35 mL/kg
Example
A 70 kg person using 35 mL/kg gets about 2.45 liters/day.