Free GLP-1 tools
Simple, private calculators for life on a GLP-1 — weight-loss percentage, BMI and a dose-day planner. Nothing you enter leaves your browser.
GLP-1 protein calculator
Estimate a daily protein range during GLP-1 weight loss, based on the 2025 joint advisory on nutrition for GLP-1 therapy.
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Water intake calculator
See the reference daily water intake for adults and how much of it usually comes from drinks — useful when a GLP-1 makes you less thirsty.
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Fiber calculator
Find the reference daily fiber intake for your age and sex, or from your calorie intake — handy when smaller GLP-1 meals mean less fiber.
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GLP-1 dose level plotter
See an estimate of how much semaglutide or tirzepatide builds up in your body over weekly doses — the same idea as Holt’s medication-level chart.
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Weight loss percentage calculator
Work out what percentage of your starting weight you’ve lost — the way GLP-1 trials and many clinicians describe progress.
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Weight loss timeline calculator
Work out how many weeks it would take to reach a goal weight at a steady weekly pace you choose. A planning aid, not a prediction.
Open toolBMI calculator
Calculate your body mass index from your height and weight, in metric or imperial units, with the standard adult categories.
Open toolGLP-1 dose day planner
Plan your weekly GLP-1 dose days, see the dates at a glance and add them to your calendar in one tap.
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