Water Intake Calculator
Calculate your recommended daily water intake based on weight, exercise and climate.
Estimates only — not professional financial, medical, legal or engineering advice. Read full disclaimer.
Calculating...
Result
Fill in the form and click Calculate to see your result here.
How it's calculated
Base Intake = Weight (kg) × 0.033 L/kg. Exercise Intake = (Exercise Minutes ÷ 30) × 0.35L. Climate Intake = +0.5L if hot/humid. Total = Base + Exercise + Climate.
Example
Example: Water Intake Calculator
Inputs
- Weight Kg: 70
- Exercise Minutes: 0
- Climate: normal
Outputs
- Daily Water Intake: 2.31
- Daily Water Intake Glasses: 10
This example uses typical sample values. Adjust the inputs above to see how the results change for your own numbers.
About this calculator
The Water Intake Calculator estimates how much water you should drink daily based on your body weight, plus additional intake for exercise duration and hot/humid climates, giving a result in both liters and standard glasses.
Frequently Asked Questions
A common baseline is about 33ml per kilogram of body weight - for a 70kg person, that's roughly 2.3 liters, before accounting for exercise or hot weather.
Yes, the calculator adds roughly 350ml of extra water intake for every 30 minutes of exercise to replace fluids lost through sweat.
The calculator converts your total liters into standard 250ml glasses, giving you an easy practical target to track throughout the day.