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Sweat Rate & Hydration Calculator

Calculate your sweat rate from pre and post-workout weight. Get your hourly fluid loss, dehydration percentage and a personalised rehydration plan for your next session.

AthletesInstant
💦 Workout Details
kg
Weigh yourself before exercise (light clothing, no shoes)
kg
Weigh yourself immediately after exercise
min
mL
How much water/sports drink you consumed during
📊 Sweat Rate Analysis
Sweat Rate
mL per hour
Dehydration Level
OptimalMild (1-2%)Moderate (3-4%)Severe (5%+)
Total Fluid Lost (mL)
mL to Rehydrate
mL to Drink Per Hour
Hydration Status
Rehydration Plan