Estimate daily hydration needs from weight and exercise duration. Enter body weight and exercise duration to estimate a daily fluid starting point.
Complete the form and select “Calculate result.” Your measurements never leave this page.
A transparent overview of the inputs, method, and appropriate interpretation.
It combines a body-weight baseline with an exercise-duration allowance to suggest a practical daily fluid starting point.
Weight and exercise hydration estimateClear answers to help you understand and use your estimate.
Yes. It is free, runs in your browser, requires no account, and does not store the measurements you enter.
No. This result is an educational estimate, not a diagnosis or treatment recommendation. A qualified professional can interpret it within your complete health and training context.
Temperature, humidity, sweat rate, altitude, diet, pregnancy, illness, and medication can substantially change fluid needs.
Update the estimate when body weight, exercise duration, climate, or daily routine changes.
Read our calculation methodology →Still have questions? Explore the guides ↗