Hydration Percentage Estimator
Estimate hydration levels and get alerts if dehydrated.
Hydration Percentage Estimator
Estimate hydration levels and get alerts if dehydrated.
This calculator is for informational purposes only and does not constitute medical advice. Consult a healthcare professional for personalised guidance.
How This is Calculated
Hydration percentage = (water consumed ÷ daily hydration goal) × 100. The daily goal defaults to 2.5 L, close to the median of EFSA guidance (2.0 L women / 2.5 L men). Scores below 75% indicate under-hydration risk according to general sports nutrition guidance.
Disclaimer: This tool provides estimates for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
How to Use This Calculator
This calculator shows how much of your daily hydration goal you have achieved.
- Step 1: Enter how many litres of water you have consumed today.
- Step 2: Enter your daily hydration goal (or leave at 2.5L default).
- Step 3: Click "Estimate Hydration" to see your progress and status.
Frequently Asked Questions
It shows what proportion of your daily hydration goal you have reached. 100% means you have met your goal for the day.
Water, herbal teas, and water-rich foods (fruits, vegetables) all contribute to hydration. Caffeinated and alcoholic drinks have a mild dehydrating effect.
Symptoms include dark urine, dizziness, headache, and fatigue. If below 50% of your daily goal by midday, increase your intake immediately.
