GLP-1 Weight Tracker: Chart Your Progress vs the Trials

A GLP-1 lowers your weight gradually, and the day-to-day scale readings bounce around enough that real progress is easy to miss and easy to catastrophize. The point of tracking is to pull back from the noise of any single morning and see the trend, then to judge that trend against something meaningful. This tracker does both: it plots your weight over the weeks and draws the published trial average for your drug right beside it.

How to use the tracker

Set it up once with your starting weight, an optional goal weight, your start date, and your medication. From then on, add a weight whenever you step on the scale, ideally once a week at a consistent time. The chart updates immediately, showing the percentage of your body weight you have lost as a solid line, with the trial-average curve as a dashed line for comparison. The stat cards above the chart summarise your total loss, the percentage lost, and how far you are from your goal.

Why compare against the trial average?

Percentages travel better than pounds. Two people who each lose 15 pounds have done very different things if one started at 180 and the other at 300, so the pivotal trials report results as a percentage of starting body weight. Framing your own results the same way lets you compare fairly against the study means: about 14.9% over 68 weeks for semaglutide in STEP 1, and about 20.9% over 72 weeks for tirzepatide in SURMOUNT-1. Our guide to weight loss on semaglutide explains where these figures come from, and the GLP-1 weight-loss timeline covers what a normal month-by-month trajectory looks like.

Being behind the line is normal

The trial curves are smooth averages reached over more than a year, alongside structured diet and activity support. Real progress is lumpier. It is completely normal to sit below the dashed line for stretches, to hit a plateau, or to lose faster early and slower later. The comparison is a reference point, not a target you are failing to hit. If your loss has genuinely stalled, our article on not losing weight on Ozempic walks through the common reasons, and the fix is usually a conversation with your prescriber rather than any change you make on your own.

Your data stays yours

Everything you enter is stored only in your browser using localStorage. Nothing is uploaded, no account is needed, and no one else can see it. The trade-off is that clearing your browser data will delete your history, so the Export CSV button lets you download a copy any time to keep a backup or move it into a spreadsheet. This privacy-first design is deliberate: your weight is personal, and a tracker should not require you to hand it over to use it.

What the tracker will not do

It will not set or change your dose, diagnose a plateau, or tell you whether your rate of loss is a medical problem. It shows your trend and a study reference, and it leaves clinical judgment to your clinician. Used the way it is intended, as a clear picture of your trend against a sensible benchmark, it turns a stressful daily number into a calm weekly one. For realistic expectations before you start, see our guide to setting realistic weight-loss goals on a GLP-1.