💧 Workout Sweat Rate & Electrolyte Calculator
Calculate hourly fluid loss sweat rate (L/hr), percentage dehydration, and sodium electrolyte replacement requirements from pre and post-workout body weight.
Free No Signup Required Browser-Based
Hourly Sweat Rate
1.70 L / hour
Total fluid lost: 1700 ml (1.6% body weight dehydration)
Post-Workout Rehydration Target
2125 mlSodium Electrolytes Lost
~1530 mg Na⁺How to Use Workout Sweat Rate & Electrolyte Calculator
- Enter pre-workout and post-workout body weights in kg
- Input fluid consumed during the workout and exercise duration in minutes
- Review hourly sweat rate in liters, dehydration percentage, and rehydration targets
📖 Technical Encyclopedia & Standards Reference
Calculate hourly fluid loss sweat rate (L/hr), percentage dehydration, and sodium electrolyte replacement requirements from pre and post-workout body weight. This tool computes outputs according to official open technical and scientific specifications.
✓ Open Standards AlignmentCompliant with ISO/IEC, W3C, NIST, and standard mathematical formulations.
✓ 100% Client-Side / SecureZero server logging. Computations execute entirely in your local browser sandbox.
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Frequently Asked Questions
How is exercise sweat rate calculated?
Sweat Rate = (Pre-weight - Post-weight in grams + Fluid consumed in ml) / Exercise duration in hours.
How much sodium is lost in sweat?
Athletes lose an average of 800 to 1,200 mg of sodium per liter of sweat, requiring electrolyte replacement during endurance training.