Free GLP-1 Calculators

Yes. Every MeAgain calculator is free, with no account or signup, and each shows its result together with the formula, limitations, and sources. MeAgain is available separately if you want to save weight, nutrition, doses, symptoms, and progress over time.

Start with the question you can state in one sentence. Use the weight-loss percentage tool for current progress, protein, water, or fiber for a reference amount, the timeline for a user-chosen scenario, and the plotter for a half-life estimate of the amount remaining from logged doses. A smaller question usually produces a more interpretable result.

Longer than the week between shots, which is why doses overlap. The FDA labels give injectable semaglutide a half-life of about one week and tirzepatide about five days, so part of each dose is still decaying when the next one lands. The free GLP-1 plotter turns your logged doses into that combined decay estimate. It is a math model, not a blood test.

Divide the weight you have lost by your starting weight and multiply by 100. Losing 20 lb from a 200 lb start is a 10% loss. The free weight-loss percentage calculator does that math in either unit and also shows the weights at your 5%, 10%, 15%, and 20% milestones.

Set one daily gram range, then log against it. The free protein calculator turns your weight into a daily protein range with a per-meal split, using published grams-per-kilogram references. The MeAgain app can then keep protein beside doses, water, fiber, weight, and symptoms, so smaller GLP-1 appetites still hit the range.

No. No web calculator can measure a blood level. The GLP-1 half-life plotter shows a mathematical estimate based on your logged doses and published half-life information. It is not a blood test, a personal medication-level model, or a dosing guide. Do not use the graph to change medication timing or amount.

No. They perform transparent arithmetic using the values you enter and published population references. They do not review your medical history, diagnose a problem, prescribe a target, or replace a licensed clinician or registered dietitian. Some conditions and medications require individualized protein, fiber, or fluid guidance.

No. Entries stay in the current browser tab and are not sent to MeAgain. Use the app only if you choose to save and track your own routine over time.