About GLP1Calc

GLP1Calc is a free, independent educational tool that helps people understand the cost and expected weight-loss timeline of GLP-1 medications. We built it because the existing GLP-1 information landscape is dominated by drug manufacturer marketing, telehealth ads, and surface-level news articles — none of which let you compare drugs head-to-head on the numbers that actually matter to a patient.

What this tool does

The calculator takes your starting weight, chosen drug, payment method, and time horizon, then projects two things side-by-side:

• Weight loss over time— modeled from the drug's phase 3 clinical trial primary endpoint, fit to a realistic exponential curve.
• Cumulative cost over time — based on manufacturer pricing, telehealth public pricing, and typical insurance copay ranges as of April 2026.

You can then compare all 8 GLP-1 drugs by cost-per-pound-lost in one table — the most useful number for understanding cost-efficiency.

What this tool is not

This is not medical advice. It does not replace a conversation with a licensed prescriber. It does not model side effects, drug interactions, contraindications, dose escalation schedules, or individual response variation. See our full medical disclaimer.

Medical review

Note: All clinical claims are sourced from peer-reviewed phase 3 trial publications. We are actively recruiting a licensed RD or NP to serve as our medical reviewer. If you are a licensed clinician interested in this role, please contact us.

Independence

GLP1Calc is not affiliated with Novo Nordisk, Eli Lilly, or any telehealth provider. We may earn affiliate commissions when readers click through to telehealth platforms, but our drug rankings and recommendations are based purely on published efficacy data and public pricing — never on commission rates.

How we keep data fresh

Drug pricing changes frequently, and the GLP-1 pipeline is evolving fast. We refresh pricing data quarterly and add new drugs as they receive FDA approval. The footer of every page shows the data's last update timestamp.