Peptide Pen Calculator — Convert Pen Clicks to Doses

Q: How many clicks is 0.25mg on Ozempic?

On the Ozempic 2mg pen, 1 click equals 0.25mg. So 0.25mg is 1 click. On the Ozempic 4mg pen, 1 click equals 0.5mg, so 0.25mg would be half a click — which is not recommended.

Q: How many clicks is 2.5mg on Mounjaro?

On the Mounjaro/Zepbound 2.5mg pen, the full pen delivers 2.5mg in 10 clicks, with each click delivering 0.25mg. The full weekly dose of 2.5mg requires all 10 clicks from one pen.

Q: Is one click on every GLP-1 pen the same dose?

No. The dose per click varies significantly between pens. An Ozempic 2mg pen delivers 0.25mg per click, while a Mounjaro 15mg pen delivers 1.5mg per click. Never assume one pen's click equals another.

Q: How long does one Ozempic pen last?

Each Ozempic pen has 8 clicks. At 0.25mg weekly (1 click), a 2mg pen lasts 8 weeks. At 0.5mg weekly (2 clicks on the 4mg pen), a 4mg pen lasts 4 weeks.

Q: What is a peptide pen calculator?

A peptide pen calculator helps you convert the number of clicks on a GLP-1 injection pen to the equivalent dose in mg or mcg. It also calculates how many clicks you need for a specific dose and how long your pen supply will last.

Select Pen

Number of Clicks

— mg

— mcg

— % of pen used

GLP-1 Pen Click Reference Chart

Clicks, dose per click, and total dose for every common GLP-1 injection pen.

Pen	Clicks	Dose per Click	Total Dose
Ozempic 2mg	8 clicks	0.25mg (250mcg)	2mg
Ozempic 4mg	8 clicks	0.5mg (500mcg)	4mg
Ozempic 8mg	8 clicks	1mg (1000mcg)	8mg
Wegovy 2.4mg	10 clicks	0.24mg (240mcg)	2.4mg
Mounjaro 2.5mg	10 clicks	0.25mg (250mcg)	2.5mg
Mounjaro 5mg	10 clicks	0.5mg (500mcg)	5mg
Mounjaro 7.5mg	10 clicks	0.75mg (750mcg)	7.5mg
Mounjaro 10mg	10 clicks	1mg (1000mcg)	10mg
Mounjaro 12.5mg	10 clicks	1.25mg (1250mcg)	12.5mg
Mounjaro 15mg	10 clicks	1.5mg (1500mcg)	15mg

How Do GLP-1 Pen Clicks Work?

Unlike reconstituted peptides drawn into an insulin syringe, GLP-1 injection pens like Ozempic, Wegovy, Mounjaro and Zepbound are pre-filled devices that dispense medication in fixed increments called clicks. Each click of the dial or plunger delivers a precise, pre-measured amount of medication — no calculation or measurement required on your part.

The dose per click varies significantly by pen type and strength. The Ozempic 2mg pen delivers 0.25mg per click, while the Mounjaro 15mg pen delivers 1.5mg per click — six times as much. Never assume that one pen's click is equivalent to another pen's click. Always confirm the mg per click for your specific pen before use.

If you are unsure of your pen's mg per click, check the packaging label, patient information leaflet, or ask your pharmacist or healthcare provider. Never adjust your dose based on click count alone without verifying the correct pen-specific data.

Medical Disclaimer: This calculator is for informational purposes only. GLP-1 medications are prescription drugs. Always follow your healthcare provider's dosing instructions. Never adjust your dose without medical guidance.

Frequently Asked Questions

How many clicks is 0.25mg on Ozempic?

On the Ozempic 2mg pen, 1 click equals 0.25mg — so 0.25mg is exactly 1 click. On the Ozempic 4mg pen, 1 click equals 0.5mg, so 0.25mg would be half a click, which is not recommended.

How many clicks is 2.5mg on Mounjaro?

On the Mounjaro/Zepbound 2.5mg pen, the full pen delivers 2.5mg in 10 clicks, with each click delivering 0.25mg. The full weekly dose of 2.5mg requires all 10 clicks from one pen.

Is one click on every GLP-1 pen the same dose?

No. The dose per click varies significantly between pens. An Ozempic 2mg pen delivers 0.25mg per click, while a Mounjaro 15mg pen delivers 1.5mg per click. Never assume one pen's click equals another.

How long does one Ozempic pen last?

Each Ozempic pen has 8 clicks. At 0.25mg weekly (1 click), a 2mg pen lasts 8 weeks. At 0.5mg weekly (2 clicks on the 4mg pen), a 4mg pen lasts 4 weeks.

What is a peptide pen calculator?

A peptide pen calculator converts the number of clicks on a GLP-1 injection pen to the equivalent dose in mg or mcg. It also calculates how many clicks you need for a specific dose, and how long your pen supply will last at your current weekly dose.

Peptide Pen Calculator — Convert Pen Clicks to Doses

GLP-1 Pen Click Reference Chart

How Do GLP-1 Pen Clicks Work?

Frequently Asked Questions

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