GLP-1 Weight Loss Timeline Calculator | Ondra Health
GLP-1 Timeline Calculator

How long to reach
your goal weight?

Week-by-week projection based on real data from the STEP-1 and SURMOUNT-1 clinical trials.

68 wks
STEP-1 trial duration
~15–22%
Avg body weight lost
Real data
Clinical trial backed

Your Details

Enter your starting weight and goal

We'll project your timeline based on the medication's clinical trial weight loss curve.

lbs
Required
lbs
Must be less than current weight

Choose your medication

Week-by-week projection Semaglutide
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Based on real clinical trial data

Projections modeled from the two largest GLP-1 weight loss trials ever conducted.

STEP-1 Trial · 2021
Semaglutide 2.4mg
−14.9%
Average body weight reduction over 68 weeks. Published in the New England Journal of Medicine.
Wilding et al., 2021. NEJM. PMID: 33567185
SURMOUNT-1 Trial · 2022
Tirzepatide 15mg
−22.5%
Average body weight reduction over 72 weeks — approaching results typically seen with bariatric surgery. Published in the New England Journal of Medicine.
Jastreboff et al., 2022. NEJM. PMID: 35658024
Disclaimer: This calculator provides estimates based on average clinical trial outcomes. Individual results vary. This is not medical advice. Consult a licensed healthcare provider before starting any weight loss medication.