Daily Water Intake Calculator
Daily water needs depend on many factors — weight, activity level, weather — but this tool applies a simple, commonly used reference formula.
This is a general reference formula (approx. 33 ml/kg); it can vary with hot weather, sweating and individual needs.
How Is Daily Water Intake Calculated?
There are various approaches to estimating daily water needs; this tool applies a widely used reference formula of approximately 33 ml per kilogram of body weight. For people who exercise regularly, an additional 500 ml is added for every 30 minutes of activity to help offset fluid lost through sweat. Actual water needs vary significantly from person to person based on ambient temperature and humidity, sweat rate, dietary habits, pregnancy/breastfeeding status and certain health conditions. If you have a condition requiring fluid restriction, such as kidney disease, your water intake should always follow your doctor's guidance.
Frequently Asked Questions
Does this include coffee or tea?
This tool focuses only on water; total fluid intake is a separate calculation and should be assessed based on your personal health situation.
You may want to use this alongside our Daily Calorie Needs Calculator (TDEE).
This tool is for general information and awareness only; it does not constitute medical advice, diagnosis or treatment recommendations. Results may deviate from true values due to measurement error and the general assumptions built into the underlying formula.
These tools offer a general idea; for an assessment specific to your situation, feel free to contact us.