Free GLP-1 Dose Calculator
All calculations happen in your browser. Nothing is stored or shared.
Click counts on GLP-1 pens vary between batches and have been found to differ even between official sources. Rather than giving you a fixed number that may not match your pen, this calculator shows you how to work out your own clicks accurately using your specific pen.
Select your medication
How to find your click count
Find your pen concentration
Look at the label on your Ozempic pen. It will show the total semaglutide content and volume, for example 4mg/3mL or 8mg/3mL. Divide the mg by the mL to get your concentration in mg per mL.
Example: 4mg divided by 3mL ≈ 1.33mg/mL (labels print this as 1.34mg/mL)
Calibrate your specific pen
Because click counts vary between batches, the most accurate method is to calibrate your own pen against a known dose marker.
Pick a dose marker printed on your pen dial. Many pens only show one marker, their own dose. Starting from zero, slowly turn the selector and count every click until you reach that marker. Write this number down. It is the calibration for your specific pen.
Calculate your dose
Enter your prescribed dose and we will calculate your clicks based on your specific pen calibration.
Why does this matter?
A 2025 article in Diabetes Care (Komé et al.) reported about 72 clicks on semaglutide multi-dose pens, while other sources report different counts. Your pen may differ, so always calibrate against your own pen rather than a published number.
Expiry reminder
Discard 56 days after first use regardless of remaining medication.
This calculator is for reference only. Click counts on GLP-1 pens are not officially sanctioned by Novo Nordisk or Eli Lilly and vary between pen batches. Unit calculations assume a standard U-100 insulin syringe. Always follow your prescriber's exact instructions. Lysa Health does not provide medical advice.
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Sources: Click count variation: Kome et al, Diabetes Care, 2025. Mounjaro dosing: Eli Lilly prescribing information, 2025. Ozempic dosing: Novo Nordisk prescribing information, revised January 2025.