GLP-1 Weight Loss Calculator
See your projected weight loss based on clinical trial data. Select a medication and enter your current weight to get started.
Frequently Asked Questions
How accurate is this calculator?
This calculator uses average weight loss data from published clinical trials (STEP 1, SURMOUNT-1, OASIS 1). Individual results vary significantly based on diet, exercise, starting weight, dosage, and how your body responds to the medication. These projections are estimates, not guarantees.
How fast will I lose weight on GLP-1 medications?
Most people see the fastest weight loss in the first 6 months as the dose is gradually increased. Weight loss typically slows around months 8-12 as the body reaches a new equilibrium. On average, people lose 12-21% of their body weight over 12-16 months depending on the medication.
Which GLP-1 medication works best for weight loss?
In clinical trials, tirzepatide (Zepbound/Mounjaro) showed the highest average weight loss at about 21% of body weight. Semaglutide (Wegovy) averaged about 15%. However, the best medication for you depends on your health history, insurance coverage, budget, and how you respond to treatment.
How much do GLP-1 medications cost?
Retail prices range from $1,000-$1,300 per month for brand-name medications without insurance. Manufacturer savings programs can reduce this to $149-$499/month. Compounded versions typically cost $200-$250/month but are not FDA-approved. Visit our Cost Guide for detailed pricing breakdowns.
Do I need a prescription for GLP-1 medications?
Yes, all GLP-1 medications require a prescription from a licensed healthcare provider. You can get prescribed through an in-person clinic or a telehealth provider. Use our directory to find providers near you or compare online options.
Medical Disclaimer
The information on this site is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. GLP-1 receptor agonists are prescription medications. Always consult with a qualified healthcare provider before starting, stopping, or changing any medication. Individual results may vary.