WaterIntakeCalculator
183 calculators

Fitness & Sports

Hydration for gym, running, cycling, workouts, and hot-weather exercise.

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Most popular in Fitness & Sports

#1 pick

Athlete & Workout Water Intake

Daily target including sweat replacement for training duration, intensity, and heat.

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#2 pick

Sweat Loss & Workout Rehydration

Estimate sweat replacement for training sessions plus your baseline daily intake — for runners, gym-goers, and cyclists.

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#3 pick

Running Water Intake

Sweat-replacement calculator for runners — accounts for run duration, pace, and weather.

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Water Intake for Pickleball Tournament

Hydration target for pickleball tournament — session duration, sweat rate, and heat adjustments.

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Water Intake for Padel Tournament

Hydration target for padel tournament — session duration, sweat rate, and heat adjustments.

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Water Intake for Squash League

Hydration target for squash league — session duration, sweat rate, and heat adjustments.

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Water Intake for Racquetball League

Hydration target for racquetball league — session duration, sweat rate, and heat adjustments.

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Water Intake — Marathon Race Day

Race-day hydration plan for marathon race day — pre-race, on-course, and recovery volumes.

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Water Intake — Half Marathon Race Day

Race-day hydration plan for half marathon race day — pre-race, on-course, and recovery volumes.

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Water Intake — 10K Race Day

Race-day hydration plan for 10k race day — pre-race, on-course, and recovery volumes.

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Water Intake — 5K Race Day

Race-day hydration plan for 5k race day — pre-race, on-course, and recovery volumes.

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Water Intake — Ultra 50K

Race-day hydration plan for ultra 50k — pre-race, on-course, and recovery volumes.

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Water Intake — Ultra 100K

Race-day hydration plan for ultra 100k — pre-race, on-course, and recovery volumes.

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Water Intake — Ultra 100Mi

Race-day hydration plan for ultra 100mi — pre-race, on-course, and recovery volumes.

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Water Intake — Century Bike Ride

Race-day hydration plan for century bike ride — pre-race, on-course, and recovery volumes.

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How it works

Simple, accurate, personalized

STEP 1

Pick your calculator

Choose the one that matches your situation from the grid above.

STEP 2

Enter a few details

Weight, activity, climate, species — takes under 30 seconds.

STEP 3

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.

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