Calculate fluid lost during exercise to plan your rehydration strategy.
Calculate fluid lost during exercise to plan your rehydration strategy.
Sweat Loss = (Pre – Post Weight) × 1000 + Fluid Consumed
Pre 72 kg, Post 71.2 kg, drank 500 mL → Sweat loss 1,300 mL.
Enter your values in the fields above and click "Calculate" to get instant results. All calculations happen in your browser — nothing is sent to any server.
What is Hydration Loss Calculator?
Calculate fluid lost during exercise to plan your rehydration strategy.
What formula does this use?
This calculator uses: Sweat Loss = (Pre – Post Weight) × 1000 + Fluid Consumed
Is this calculator free?
Yes! All calculators on CalcNest AI are 100% free with no account required.
Is my data safe?
Absolutely. All calculations run locally in your browser. We never store or transmit your input data.