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.
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Water Intake for Rowing Crew
Hydration target for rowing crew — session duration, sweat rate, and heat adjustments.
OpenWater Intake for Kayaking Race
Hydration target for kayaking race — session duration, sweat rate, and heat adjustments.
OpenWater Intake for Canoeing
Hydration target for canoeing — session duration, sweat rate, and heat adjustments.
OpenWater Intake for Paddleboarding Long
Hydration target for paddleboarding long — session duration, sweat rate, and heat adjustments.
OpenWater Intake for Surfing Session
Hydration target for surfing session — session duration, sweat rate, and heat adjustments.
OpenWater Intake for Kite Surfing
Hydration target for kite surfing — session duration, sweat rate, and heat adjustments.
OpenWater Intake for Windsurfing
Hydration target for windsurfing — session duration, sweat rate, and heat adjustments.
OpenWater Intake for Sailing Race
Hydration target for sailing race — session duration, sweat rate, and heat adjustments.
OpenWater Intake for Scuba Diving Day
Hydration target for scuba diving day — session duration, sweat rate, and heat adjustments.
OpenWater Intake for Freediving Training
Hydration target for freediving training — session duration, sweat rate, and heat adjustments.
OpenWater Intake for Snorkeling Tropical
Hydration target for snorkeling tropical — session duration, sweat rate, and heat adjustments.
OpenWater Intake for Climbing Multipitch
Hydration target for climbing multipitch — session duration, sweat rate, and heat adjustments.
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Weight, activity, climate, species — takes under 30 seconds.
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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.