GLP-1 Water Intake Calculator
How much water should I drink on Mounjaro? Personalised litres/day from weight, exercise and climate.
Aim for about this much water per day
3.4 litres
3404 ml · ~115 fl oz · ~213 ml each waking hour
- Base (~33 ml/kg)+2640 ml
- Activity & climate adjustment+264 ml
- GLP-1 / low-appetite adjustment+500 ml
A common GLP-1 starting point is about 3.4 L/day (3404 ml). Includes a +500 ml buffer because appetite suppression often means less water from food.
- Sip small amounts through the day — large gulps can worsen nausea on GLP-1s.
- Pale yellow urine is a simple hydration check.
- If you increase fibre for constipation, raise fluids at the same time.
- People with heart or kidney conditions need individual fluid advice from their clinician.
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Suggested citation: GLP-1 Water Intake Calculator — www.glppal.app/tools/water-intake-calculator
Why hydration matters more on GLP-1s
Appetite suppression means less water from food. Dehydration can amplify headache, constipation and fatigue. This calculator starts from ~33 ml/kg, adjusts for activity and climate, then adds a GLP-1 buffer — educational guidance for searches like “how much water should I drink on mounjaro”.
How to use the water intake calculator
- 1
Enter your weight and activity level.
- 2
Choose climate and whether you have active GI losses.
- 3
See litres/day, hourly sip size and breakdown.
- 4
Pair with the fibre calculator and constipation tracker if constipation is the main issue.
Start tracking your GLP-1 journey with GLPPal
Download free on the App Store — injections, appetite, weight and side effects in one calm timeline.
Related GLP-1 tools
- Constipation TrackerTrack bowel frequency, severity, symptoms, water and fibre on Mounjaro, Wegovy, Ozempic or Zepbound — then export a CSV for your clinician.Read more
- Fibre CalculatorDaily fibre target for constipation on Mounjaro / Wegovy — plus gentle food ideas and how fast to increase.Read more
- Electrolyte CalculatorQuick check for electrolyte focus on GLP-1s — sodium, potassium and magnesium ranges plus food sources.Read more
Explore more on GLPPal
Tracking tools
Water Intake Calculator FAQ
Many people land around 2–3.5 litres depending on body size, heat and exercise. Sip through the day rather than chugging, which can worsen nausea.
Track your full GLP-1 journey in GLPPal
Download on the App Store. Log injections, appetite, weight and side effects — with reminders and weekly pattern insights.
GLPPal is designed for tracking and educational purposes only and is not medical advice.