Free GLP-1 tools

What these tools are, and what they are not

Every tool on this page is a general-wellness estimator. It takes numbers you type, applies published arithmetic to them, and shows you the result. That is the whole scope, and the boundary is deliberate: none of these pages produces a clinical target, a diagnosis, or an assessment of your health, and none of them knows anything about you beyond the figures in the boxes.

Two of them — protein and water — print a nutrition figure, and both are anchored to reference ranges that were published by expert bodies and are cited on the page by publisher and year, so you can go and read the source rather than take our word for it. Both say in the same breath what those bodies say: that individual needs vary a great deal, and that your provider or a registered dietitian is the person who sets your actual target. That is not a disclaimer bolted on the end. It is the correct way to use a population reference range.

The tools this site will not build

There is real, heavy search demand in this niche for a dose calculator, a titration chart and a reconstitution or bacteriostatic-water calculator. We have looked at the numbers and we are not building any of them. A web page that prints a milligram figure is a page somebody can act on, and nobody at this end knows your prescription, your history or your prescriber's reasoning. Dose, titration and mixing are matters for a licensed prescriber and pharmacist. No amount of traffic makes that a good trade.

Nothing you type leaves your browser

This is worth stating precisely rather than as a slogan, because "private" is a word every site uses. These pages contain no analytics on what you enter, no form submission, no API call, no account and no storage. The arithmetic is plain JavaScript executing inside the page on your own device, the same way a spreadsheet formula runs on your own computer. There is no server to send your weight to, because none of these tools has a server component at all.

The practical consequences follow from that. Closing the tab discards everything. Reloading the page clears the fields. Nothing is remembered between visits, which is a genuine limitation as well as a feature — if you want the numbers kept, that is what an app is for, and it should be an explicit choice rather than something that happens to you because you typed into a box.

You can verify all of this rather than trust it. Open your browser's developer tools, switch to the Network tab, and use any tool on this site: no request will be made. That is a stronger guarantee than a privacy policy, because it is one you can check yourself in about ten seconds.

Which tool answers which question

The five tools split cleanly by the question you actually arrived with, and the split is worth reading before you pick one, because the most common mistake here is running the wrong calculation and then believing the answer.

• "How much have I lost, in the units research uses?" — the weight loss percentage calculator. Percentage of body weight is what clinical results are reported in, and it is the only figure that compares meaningfully between two people of different sizes.
• "How many grams of protein is that range actually asking for?" — the protein intake calculator, which converts published per-kilogram ranges into grams a day and grams per eating occasion.
• "How much should I be drinking?" — the water intake calculator, which shows the published adequate intake alongside the per-kilogram rule of thumb so you can see how far apart they are.
• "At this pace, roughly when?" — the goal weight date calculator, which uses the pace you measured and no assumed rate of loss whatsoever.
• "I want to write it down on paper." — the printable tracker template, which builds a weekly log sheet with the columns you choose and prints straight from your browser.

If your question is about height and weight together rather than change over time, the BMI calculator is on its own page along with an educational medication-level estimator, and it comes with the same warning every honest BMI page carries: it is a population screening measure, not a description of an individual body.

Why a calculator and not another article

An honest answer: because a tool is useful at the moment you need it and an article usually is not. Somebody working out whether they have crossed 10% does not want nine hundred words on the significance of percentage change — they want the number, and then, if it turns out to be interesting, the nine hundred words. Putting the tool first and the explanation underneath it is the order the reader is actually in.

There is a second reason, and it is worth being straightforward about since this is a marketing site: a working tool is a thing people link to, and an app publisher needs people to link to something. That incentive is real, and the way to keep it from corrupting the pages is a hard rule about what the tools may compute. Everything here is either arithmetic on your own numbers or a conversion of a published range with its source named. Nothing is a target we invented, and nothing goes near a dose.

Accuracy, and where these tools are weakest

Each tool carries its own limitations section, and they are not decorative — the percentage tool cannot see body composition, the protein tool cannot resolve which body weight a per-kilogram range should be applied to, the water tool is quoting two respected agencies that land a litre apart, and the goal-date tool is extending a straight line through a process that is emphatically not linear. Read those sections. A calculator that tells you what it cannot do is more useful than one that does not.

Using them together

Run once, these tools each answer one question. The value compounds when you run them repeatedly, and that is also where doing it by hand quietly falls apart — you need your starting weight from six months ago, the dates of two weigh-ins, and the discipline to recalculate on a schedule. Most people manage that for about three weeks.

That is the honest case for GLP-1 Tracker, and it is a case about arithmetic and continuity rather than novelty. It keeps your starting weight, recalculates your percentage lost and your weight trend every time you log, totals protein and hydration against a target you set, logs your doses and injection sites, and keeps the history that a browser tool deliberately throws away. The tools above are free and complete on their own; the app is what you use when you want the same numbers without having to fetch them.