How Our GLP-1 Weight-Loss Calculator Works

Short answer: the calculator takes your current weight and goal weight, then projects a month-by-month timeline using an approach-to-plateau curve calibrated to the average outcomes reported in the STEP 1 (semaglutide) and SURMOUNT-1 (tirzepatide) clinical trials.

What goes into the estimate

• Your current weight
• Your goal weight
• A plateau percentage for each medication (~14.9% for semaglutide, ~20.9% for tirzepatide), drawn from published trial averages
• An approach-to-plateau rate reflecting how quickly each medication's trial population trended toward that plateau

What doesn't change the estimate

We ask for age and sex during the calculator flow for context, but the weight-loss projection itself is driven by your starting weight, goal weight, and the medication's trial-average curve. The calculator doesn't account for dosage titration, diet, exercise, or individual metabolic differences, all of which can meaningfully affect a real person's results.

Why it's an estimate, not a prediction

Clinical trials report averages across hundreds of participants. Any individual can reasonably land above or below that average. The calculator is meant to set realistic expectations for the shape and pace of a GLP-1 weight-loss timeline, not to forecast your exact outcome. A licensed provider is the only reliable source for a personalized medical assessment.