Semaglutide Weight Loss Calculator
See a personalized, month-by-month estimate of semaglutide weight loss (Ozempic or Wegovy), based on the average outcomes reported in the STEP 1 clinical trial.
Medical Disclaimer
This calculator is for educational and informational purposes only and does not provide medical advice, diagnose any condition, recommend or prescribe treatment, or guarantee results. Estimates are based on information you provide and published clinical-trial averages. Individual results can vary significantly.
Estimates are based on average outcomes reported in the STEP 1 (semaglutide) and SURMOUNT-1 (tirzepatide) clinical trials. Individual results can vary significantly and are influenced by factors such as dosage, diet, and adherence.
Do not start, stop, or change any medication based on the results of this calculator. Always consult a qualified healthcare professional regarding medications, treatment options, risks, side effects, and your individual health needs.
The data behind this estimate
Semaglutide is the active ingredient in Ozempic and Wegovy. In the STEP 1 trial, adults taking semaglutide 2.4 mg weekly lost an average of about 14.9% of their starting body weight over 68 weeks. This calculator applies that published average, and the trial's approach-to-plateau pattern, to your own starting and goal weight.
- Trial: STEP 1 (semaglutide 2.4 mg weekly)
- Duration: 68 weeks
- Average total body-weight reduction: ~14.9%
Want the tirzepatide numbers too? Try the tirzepatide calculator or read the full semaglutide vs. tirzepatide comparison.