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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