Average weight loss on Wegovy, based on your BMI.
Answer a few questions and find out how much weight you could lose and how quickly.
Which GLP-1 medication are you on, or thinking about?
Wegovy and Ozempic are the same molecule on different labels, and Wegovy vs Ozempic shows where their doses and approved uses differ. To compare it with tirzepatide, see Wegovy vs Zepbound.
The same tool for other medications: GLP-1 weight loss calculator, Ozempic weight loss calculator, Semaglutide weight loss calculator, Mounjaro weight loss calculator, Zepbound weight loss calculator, and Tirzepatide weight loss calculator.
Sources: STEP-1 ↗ · SURMOUNT-1 ↗
Related: Wegovy · Wegovy vs Zepbound · Semaglutide
How the Wegovy weight loss calculator works
Enter your weight and height, then pick a medication and dose. The tool takes the average weight loss measured in that drug's main clinical trial: STEP-1 for semaglutide, SURMOUNT-1 for tirzepatide. It maps that trial figure onto your starting weight, plotting your projected weight and BMI week by week. The numbers come straight from the published trials, not a generic calorie formula.
What STEP-1 found
STEP-1 gave 1,961 adults with obesity, or overweight with a weight-related condition, and no diabetes, weekly semaglutide 2.4 mg or placebo for 68 weeks, with lifestyle support. Mean weight change was −14.9% against −2.4% on placebo, or −15.3 kg against −2.6 kg.
| Group | Mean weight change, week 68 | Lost 5% or more |
|---|---|---|
| Semaglutide 2.4 mg | −14.9% | 86.4% |
| Placebo | −2.4% | 31.5% |
How much weight will I lose in 4 months on Wegovy?
No published figure answers this for month 4. STEP-1 reported weight at week 68. On the Wegovy label, the injection dose steps up every 4 weeks and reaches the maintenance dosage at week 17. The calculator's curve before week 68 is our model of how the trial average builds, not a measured value. Enter your weight above and read week 16 off the chart.
What is the average first month weight loss on Wegovy?
Neither STEP-1's published results nor the Wegovy label give a first-month average. Semaglutide pens start at 0.25 mg for 4 weeks on both the Wegovy label and the Ozempic label, and that dose is a starting step.
Can you lose 20 pounds in 2 months on Wegovy?
Twenty pounds in two months is about 2.3 pounds a week. The CDC says people who lose weight at a gradual, steady pace of about 1 to 2 pounds a week are more likely to keep it off. STEP-1 reports an average at week 68, not at two months. Enter your weight above to see where the modeled curve sits at week 8.
What is a healthy amount of weight to lose per week on Wegovy?
The CDC describes about 1 to 2 pounds a week as a gradual, steady pace, and says people who lose at that pace are more likely to keep the weight off. STEP-1 reports an average at week 68, not a weekly target. Your prescriber is the one to judge your own pace.