How Much Water Should I Drink on Mounjaro? Free Calculator (2026)
How much water on Mounjaro or Wegovy? Free GLP-1 water intake calculator based on weight, exercise, climate and GI symptoms.

How much water should I drink on Mounjaro? sits next to constipation and headache searches for a reason: appetite suppression quietly cuts fluid from food.
A practical GLP-1 hydration target
Educational calculators often combine:
- Base fluids from body weight
- Extra for exercise
- Extra for hot / humid climates
- A GLP-1 adjustment (~500 ml) when food volume is low
- A little more if you have active vomiting or diarrhoea (and you should still seek care if that persists)
Free water intake calculator
Use the GLP-1 water intake calculator to see litres/day, a rough hourly sip size, and the breakdown of those adjustments.
Pair it with:
- Fibre calculator if stools are the problem
- Electrolyte checker if cramps, heavy sweating or GI losses are in the mix
Simple daily check
Pale yellow urine is a rough home signal. Dark yellow all day usually means you need more fluids (unless medically restricted).
Open the water calculator → · Electrolytes → · Download on the App Store →
Track your GLP-1 journey with GLPPal
GLPPal helps you spot whether headaches and constipation cluster on low-intake weeks after dose changes — then you can course-correct with your clinician.
GLPPal is designed for tracking and educational purposes only and is not medical advice. Always follow your healthcare provider's guidance.