Daily Water & Electrolyte Needs Calculator

Personalize hydration in seconds: enter profile, environment, and workouts to get safe daily fluids, per‑hour targets, and sodium guidance. See bottle‑size mixes, an hourly plan, charts, CSV export, and print‑ready results—designed for athletes, travelers, and busy workers. Includes lifestyle nudges, sweat‑rate wizard, low‑carb options, acclimation settings, safety alerts, and multilingual units for global users.

Units
Profile
Environment
Activity
Lifestyle & Goals
Daily Plan (Summary)
Totals include baseline + activity adjustments. Activity fluids are capped for safety.

0.0
L total fluids
0.0
L during workouts
0
ml/h target
0
× 750 ml bottles
Workout Targets
Per-hour fluids and electrolytes while training.
Mix strength: —

0
ml/h fluids
0
mg/L sodium
0
mg/h sodium
0
g/L carbs
Bottle presets
Electrolyte Targets (from workout mix)
Calculated for the portion of activity fluids taken as electrolyte drink.

0
mg sodium
0
mg potassium
0
mg magnesium
0
mg chloride
Simple homemade mix (approximate)
  • Table salt ~ 0 tsp per liter (≈2,300 mg sodium per tsp)
  • Carbs: 0 g per liter (≈6% solution is 60 g/L). Set to 0 g if low-carb/fasting.
  • Optional: citrus, a pinch of baking soda, and flavor to taste.
Hourly Plan
Use this to pace fluids around your day.

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Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.