247SportTools
Fitness · Nutrition

Exercise Hydration Calculator

Estimate how much fluid to drink before, during and after exercise based on duration and conditions.

Hydration needs

Total fluid needed

Top picks compared

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Top pick Hydration Electrolyte Tablets Replace sodium and minerals lost in sweat during long sessions. Check price →
Option Insulated Water Bottle (1L) Keep fluids cold through a full training session or race. Check price →
Option Sports Hydration Pack Hands-free hydration for long runs, rides and hikes. Check price →

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Frequently asked questions

How do I know if I'm dehydrated?

Urine colour is the simplest check: pale yellow = well hydrated, dark yellow = drink more, clear = possibly over-hydrated. Thirst is a late signal — don't wait until you're thirsty during hard exercise.

Do I need sports drinks?

For sessions under 60-90 minutes, water is fine. For longer or very intense sessions in heat, a drink containing sodium and carbohydrates helps maintain performance and electrolyte balance.