Free Tool

GLP-1 Hydration & Electrolyte Calculator

Calculate how much water and electrolytes you should consume each day while taking GLP-1 medications based on your weight, activity level, and climate.

Body weight

Activity level

Climate

Current side effects

Daily water target

100 oz

About 3.0 liters — roughly 13 cups spread across the day.

Sodium

500 mg

Potassium

350 mg

Magnesium

300 mg

That's about 1 electrolyte serving per day alongside your food.

Why hydration is harder on a GLP-1

Reduced appetite means less food — and roughly 20% of daily fluid normally comes from food. Add slower gastric emptying, occasional nausea or diarrhea, and it's easy to slide into mild dehydration, which shows up as fatigue, headaches, dizziness, constipation and muscle cramps.

Sip steadily rather than chugging (large volumes sit heavily), and replace minerals — plain water alone can dilute sodium when intake is already low.

This tool provides general wellness estimates only and is not medical advice. Talk to your healthcare provider before changing your nutrition, hydration, or supplement routine — especially while taking GLP-1 medications.