Free GLP-1 Weight-Loss Calculator
See how much weight you could lose on Ozempic, Wegovy, Mounjaro, or Zepbound — and roughly how long it may take — based on the averages from the pivotal clinical trials.
GLP-1 Weight-Loss Calculator
Estimate your loss from clinical-trial averages
The average on this med is ~32 lb (to ~179 lb). Your goal is beyond that average — ask your provider about going further.
Estimate based on published trial averages (STEP, SURMOUNT). Individual results vary; this is not medical advice.
Add this free tool to your website
Embed the GLP-1 calculator on your blog, clinic site, or newsletter. It is free and works anywhere. Just copy this snippet and paste it into your page:
<iframe src="https://www.trimm-app.com/widget/weight-loss-calculator" width="100%" height="680" style="border:none;max-width:600px" loading="lazy" title="Free GLP-1 Weight-Loss Calculator"></iframe>
<p style="font:13px sans-serif">Free <a href="https://www.trimm-app.com">GLP-1 weight-loss calculator</a> by Trimm</p>Tip: it drops straight into WordPress, Webflow, Squarespace, or any HTML page.
How much weight can you lose on GLP-1 medication?
In the pivotal trials, people lost an average of about 15% of their body weight on semaglutide (Wegovy) over roughly 68 weeks, and about 21% on tirzepatide (Mounjaro/Zepbound) over about 72 weeks. Ozempic, dosed for type 2 diabetes, tends to produce somewhat less. This calculator applies those averages to your starting weight to estimate your likely loss and a rough timeline.
How GLP-1 weight loss works
GLP-1 receptor agonists slow stomach emptying and reduce appetite, so you eat less without constant hunger. Loss is fastest in the first few months and slows as your body adjusts and the dose plateaus, which is why the projection curve above flattens over time. Pairing the medication with protein-forward meals, strength training, and consistent tracking — what Trimm is built for — protects muscle and helps the results stick.
How accurate is this estimate?
It is an average, not a promise. Real results depend on your dose, how long you stay on the medication, diet, activity, sleep, and individual biology — some people lose much more or less. Use it to set a realistic expectation, then work with your prescriber on the plan that is right for you. This tool is for information only and is not medical advice.