Mounjaro Weight Loss Calculator
Estimate your potential weight loss on Mounjaro (tirzepatide) based on SURMOUNT clinical trial data
Medical Disclaimer: This tool provides general educational estimates. Always consult your prescribing physician or healthcare provider before making medication changes or interpreting results from population-based models.
Frequently Asked Questions
In SURMOUNT-1 (N=2,539), the 15 mg dose produced 22.5% average weight loss at 72 weeks. The 10 mg dose: 19.5%, 5 mg dose: 15%.
Mounjaro targets both GIP and GLP-1 receptors. Maximum dose produced 22.5% loss vs semaglutide's 14.9% at its highest weight-loss dose.
Starts at 2.5 mg weekly, increases by 2.5 mg every 4 weeks up to 15 mg maximum based on tolerability.
Most notice weight loss within 4-8 weeks. Most rapid loss occurs between weeks 12-36 during dose escalation.
SURMOUNT-4 showed participants who switched to placebo regained ~50% of lost weight over 52 weeks.
Yes. Projections are from the SURMOUNT clinical trial program (Jastreboff et al., NEJM 2022, N=2,539).
Sources
- Jastreboff AM, et al. Tirzepatide Once Weekly for the Treatment of Obesity. N Engl J Med. 2022;387(3):205-216. (SURMOUNT-1) Link
- Garvey WT, et al. Tirzepatide for obesity in people with type 2 diabetes (SURMOUNT-2). Lancet. 2023. Link
- Aronne LJ, et al. Continued Treatment With Tirzepatide (SURMOUNT-4). JAMA. 2024. Link
- Eli Lilly. Mounjaro (tirzepatide) Prescribing Information. FDA.gov. Link
Methodology
This calculator projects weight loss using dose-specific outcomes from SURMOUNT-1 (Jastreboff et al., NEJM 2022, N=2,539). Base weight loss: 15% (5mg), 19.5% (10mg), 22.5% (15mg) at 72 weeks. Scaled non-linearly for duration and adjusted for activity/diet.
Mounjaro (tirzepatide) is a dual GIP/GLP-1 agonist. SURMOUNT-1: 15mg = 22.5%, 10mg = 19.5%, 5mg = 15% weight loss at 72 weeks. Starts 2.5mg weekly, escalates every 4 weeks.
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