Fitness & Sports
Hydration for gym, running, cycling, workouts, and hot-weather exercise.
Most popular in Fitness & Sports
Athlete & Workout Water Intake
Daily target including sweat replacement for training duration, intensity, and heat.
Open calculatorSweat Loss & Workout Rehydration
Estimate sweat replacement for training sessions plus your baseline daily intake — for runners, gym-goers, and cyclists.
Open calculatorRunning Water Intake
Sweat-replacement calculator for runners — accounts for run duration, pace, and weather.
Open calculatorExplore the full library
Orangetheory Water Intake
OTF class hydration.
OpenPeloton Ride Water Intake
Peloton bike hydration.
OpenPeloton Tread Water Intake
Peloton tread hydration.
OpenZumba Class Water Intake
Zumba class hydration.
OpenDance Cardio Water Intake
Dance workout hydration.
OpenKickboxing Class Water Intake
Kickboxing hydration.
OpenRowing Workout Water Intake
Rowing session hydration.
OpenStairmaster Workout Water
Stair session hydration.
OpenElliptical Workout Water
Elliptical session hydration.
OpenCrossFit Open Water Intake
CrossFit Open hydration.
OpenWater Intake for Swimming Training
Hydration target for swimming training — session duration, sweat rate, and heat adjustments.
OpenWater Intake for Water Polo
Hydration target for water polo — session duration, sweat rate, and heat adjustments.
OpenSimple, accurate, personalized
Pick your calculator
Choose the one that matches your situation from the grid above.
Enter a few details
Weight, activity, climate, species — takes under 30 seconds.
Get your target
A research-backed daily target plus an hourly schedule.
Learn the science behind fitness & sports
Read our in-depth guides for research-backed context on every calculator here.