Zepbound weight loss calculator
In SURMOUNT-1, adults taking tirzepatide 10 mg weekly lost an average of 19.5% of body weight over 72 weeks. Enter your start weight to project that curve onto you, and see when the trial average would reach your goal. Nothing is stored, and no account is needed.
Common questions
How much weight do people lose on Zepbound?
How fast does Zepbound work?
Is Zepbound the same as Mounjaro?
Where the numbers come from
The curve is an exponential time course normalized to hit each trial's published end-of-trial average exactly, and the shaded band is an approximate middle half of participants derived from the published responder rates. The time constants and the band are modeling choices, documented in the open; the endpoints are the trials' own numbers. A projection is a trial average, not a prediction of any one person.
- STEP 1: Wilding et al., NEJM 2021
- STEP 2: Davies et al., Lancet 2021
- SURMOUNT-1: Jastreboff et al., NEJM 2022
- SURMOUNT-2: Garvey et al., Lancet 2023
- SCALE: Pi-Sunyer et al., NEJM 2015
- SCALE Diabetes: Davies et al., JAMA 2015
The same open-methods posture applies to every number in the app. See how we calculate.
Other medications
General information, not medical advice. Dosing, eligibility, and side effects are decisions for you and your prescriber; if side effects are on your mind, start with tracking GLP-1 side effects. Trial averages describe groups, not any one person.
See your own curve, not the average
The projection here is a trial average. Log your doses and weigh-ins and SteadyRange charts your actual progress alongside your glucose, dose changes, and time in range, on a private log you control.