Estimate a general daily fluid target based on
body weight, exercise and hot-weather exposure.
Unit System
Enter 0 if you do not want an exercise
adjustment.
This only converts the result into an
approximate number of glasses.
Please enter valid values.
Your Estimated Daily Fluid Target
Estimated Daily Fluid
0
litres/day
Total in Millilitres
-
Total in US Fluid Ounces
-
Calculation Breakdown
The result combines a weight-based
baseline with the selected adjustments.
Weight-Based Baseline
-
Exercise Adjustment
-
Heat Adjustment
-
Using your selected glass size:
-
How is water intake estimated?
This calculator uses a simple planning
estimate rather than claiming that one
amount is correct for every adult.
Baseline = Body Weight x 35 mL/kg/day
Exercise Adjustment =
350 mL per 30 minutes of exercise
Hot Weather Adjustment =
+500 mL/day when selected
Example for a 70 kg adult exercising for
30 minutes in normal weather:
Baseline:
70 x 35 = 2,450 mL
Exercise:
+350 mL
Estimated Total:
2,800 mL = 2.8 L/day
Important:
This is a general fluid-intake estimate,
not a medical recommendation. Fluid needs
vary with diet, climate, sweating, exercise,
pregnancy, breastfeeding, illness and other
factors. Some medical conditions involving
the kidneys, heart, liver or fluid balance
may require individualized fluid limits or
targets from a healthcare professional.
Fluids from beverages and water-containing
foods can both contribute to total intake.
