GLPcalcs provides free, evidence-based calculators to help people using GLP-1 medications understand their treatment — from projected weight loss to monthly costs to nutritional needs. Every calculation is grounded in published clinical research.
All calculators, projections, and information on this website are provided for informational and educational purposes only. They are not a substitute for professional medical advice, diagnosis, or treatment.
Specifically, GLPcalcs does not:
Always consult a qualified healthcare provider — such as your primary care physician, an endocrinologist, or a licensed telehealth provider — before starting, changing, or stopping any GLP-1 medication or other treatment. If you are experiencing a medical emergency, call 911 or your local emergency services immediately.
Individual results with GLP-1 medications vary significantly based on factors including genetics, diet, exercise, adherence, and underlying health conditions. The projections shown on this website are based on population averages from clinical trials and may not reflect your personal experience.
GLPcalcs is an independent publisher of free online calculators for people navigating GLP-1 medications — one of the fastest-growing and most complex areas of modern medicine. Millions of people are starting semaglutide, tirzepatide, and related medications, often with limited support in understanding what to expect, what it will cost, and how to optimize their results.
Our calculators are designed to fill that information gap: translating dense clinical trial data, complex insurance rules, and nutrition science into practical, personal numbers you can actually use.
We are not a pharmacy, telehealth provider, insurance company, or healthcare practice. We do not prescribe medications, provide medical consultations, or handle any personal health data. Any information you enter into our calculators is processed locally in your browser and is never transmitted to our servers.
Every projection and recommendation on GLPcalcs is derived from peer-reviewed clinical research and published regulatory data. Our primary sources include:
Semaglutide 2.4mg for obesity — the pivotal Phase 3 trial for Wegovy. N=1,961. Published in New England Journal of Medicine. PMID: 33567185.
Tirzepatide for obesity — the pivotal Phase 3 trial for Zepbound. N=2,539. Published in New England Journal of Medicine. PMID: 35658024.
Official FDA-approved labeling for Wegovy, Zepbound, Ozempic, and Mounjaro — used for eligibility criteria and dose schedules.
Recommendations from the American Society for Nutrition and published research on protein needs during caloric restriction and GLP-1 treatment.
List prices and savings program terms sourced directly from Novo Nordisk, Eli Lilly, and major pharmacy benefit databases. Updated regularly.
Coverage rates and eligibility criteria based on published plan data, state mandates, and CMS guidance as of April 2026.
Every projection is based on published, peer-reviewed data. We cite our sources and link to primary research wherever possible. We do not make claims that exceed what the clinical evidence supports.
Population averages from clinical trials do not predict individual outcomes. We consistently communicate that our projections are estimates based on averages, and that individual results vary significantly.
The GLP-1 landscape changes rapidly — new approvals, pricing changes, insurance policy updates, and emerging research. We review and update our calculators and content regularly. Each page carries a last-updated date.
All calculations happen locally in your browser. We do not collect, store, or transmit the health information you enter into our calculators. Your weight, measurements, and health conditions remain on your device only.
GLPcalcs is free to use and is supported by display advertising and affiliate partnerships. We disclose these relationships clearly and they do not influence our editorial content or calculator methodology.
GLPcalcs is supported by display advertising (served through Google AdSense and similar networks) and affiliate partnerships with telehealth providers, supplement companies, and other health-related businesses.
When you click certain links on this site — particularly "Compare GLP-1 Programs" buttons and similar calls-to-action — and complete a purchase or registration, GLPcalcs may receive a commission. These commissions help keep all our calculators free.
This compensation does not influence our calculator methodology, projections, or editorial content. We do not recommend products or services based on commission rates. Our goal is accurate, useful information — not maximizing affiliate revenue.
Every tool on GLPcalcs is free, requires no account or sign-up, and works entirely in your browser.