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Pen Calculator UK: How Many Clicks on a Peptide Pen?
UK PEN CALCULATOR
Looking for a pen calculator or pen click calculator? Choose your MyPep pen, type the amount in mg or mcg, and this free tool tells you exactly how many clicks to turn the dial. It works for every pen we sell, including the Retatrutide pen (10mg, 20mg, 30mg and 40mg), the Tirzepatide pen, Semaglutide pens and all our blend pens.
Quick answer
MyPep pens hold a 3ml cartridge. 1 click = 0.01ml, one full turn of the dial is 60 clicks (0.6ml), and a full pen is 300 clicks. To work out clicks: amount wanted ÷ (pen mg ÷ 300). Example: on a 40mg Retatrutide pen, 1 click = 0.133mg, so 2mg = 15 clicks.
🖊️ Pen Click Calculator
Pick your pen, type the amount, and see how many clicks to turn.
Based on our pens: 3ml cartridge, 1 click = 0.01ml, up to 60 clicks per turn, 300 clicks in a full cartridge. This is a maths tool only. For laboratory research use only. Not for human consumption.
Pen Click Chart: How Many Clicks for Each Amount?
This pen click chart shows how many clicks each amount takes on a 10mg, 20mg, 30mg and 40mg pen. It works for Retatrutide, Tirzepatide and Semaglutide pens because they all use the same 3ml cartridge. ≈ means rounded to the nearest whole click. * means more than one full 60-click turn.
| Amount | 10mg pen | 20mg pen | 30mg pen | 40mg pen |
|---|---|---|---|---|
| 0.25mg | ≈8 clicks | ≈4 clicks | ≈3 clicks | ≈2 clicks |
| 0.5mg | 15 clicks | ≈8 clicks | 5 clicks | ≈4 clicks |
| 1mg | 30 clicks | 15 clicks | 10 clicks | ≈8 clicks |
| 1.5mg | 45 clicks | ≈23 clicks | 15 clicks | ≈11 clicks |
| 2mg | 60 clicks | 30 clicks | 20 clicks | 15 clicks |
| 2.5mg | 75 * clicks | ≈38 clicks | 25 clicks | ≈19 clicks |
| 3mg | 90 * clicks | 45 clicks | 30 clicks | ≈23 clicks |
| 4mg | 120 * clicks | 60 clicks | 40 clicks | 30 clicks |
| 5mg | 150 * clicks | 75 * clicks | 50 clicks | ≈38 clicks |
| 6mg | 180 * clicks | 90 * clicks | 60 clicks | 45 clicks |
| 8mg | 240 * clicks | 120 * clicks | 80 * clicks | 60 clicks |
| 10mg | 300 * clicks | 150 * clicks | 100 * clicks | 75 * clicks |
| 12mg | 360 * clicks | 180 * clicks | 120 * clicks | 90 * clicks |
mg per Click for Every MyPep Pen
Every MyPep pen holds 3ml and has 300 clicks, so 1 click = the pen mg ÷ 300. Here is the figure for every pen we sell.
| Pen | 1 click | 10 clicks | 60 clicks (full turn) | Whole pen |
|---|---|---|---|---|
| Retatrutide pen 40mg | 0.133mg | 1.333mg | 8mg | 40mg / 300 clicks |
| Retatrutide pen 30mg | 0.1mg | 1mg | 6mg | 30mg / 300 clicks |
| Retatrutide pen 20mg | 0.067mg | 0.667mg | 4mg | 20mg / 300 clicks |
| Retatrutide pen 10mg | 0.033mg | 0.333mg | 2mg | 10mg / 300 clicks |
| Tirzepatide pen 40mg | 0.133mg | 1.333mg | 8mg | 40mg / 300 clicks |
| Tirzepatide pen 30mg | 0.1mg | 1mg | 6mg | 30mg / 300 clicks |
| Tirzepatide pen 20mg | 0.067mg | 0.667mg | 4mg | 20mg / 300 clicks |
| Tirzepatide pen 10mg | 0.033mg | 0.333mg | 2mg | 10mg / 300 clicks |
| Semaglutide pen 40mg | 0.133mg | 1.333mg | 8mg | 40mg / 300 clicks |
| Semaglutide pen 30mg | 0.1mg | 1mg | 6mg | 30mg / 300 clicks |
| Semaglutide pen 20mg | 0.067mg | 0.667mg | 4mg | 20mg / 300 clicks |
| Semaglutide pen 10mg | 0.033mg | 0.333mg | 2mg | 10mg / 300 clicks |
| Tesamorelin pen 40mg | 0.133mg | 1.333mg | 8mg | 40mg / 300 clicks |
| Semax pen 40mg | 0.133mg | 1.333mg | 8mg | 40mg / 300 clicks |
| KLOW blend pen 80mg | 0.267mg | 2.667mg | 16mg | 80mg / 300 clicks |
| GHK-Cu + BPC-157 pen 60mg | 0.2mg | 2mg | 12mg | 60mg / 300 clicks |
| Tirzepatide + Retatrutide blend pen 20mg | 0.067mg | 0.667mg | 4mg | 20mg / 300 clicks |
| Semaglutide + Cagrilintide blend pen 20mg | 0.067mg | 0.667mg | 4mg | 20mg / 300 clicks |
| BPC-157 + TB-500 blend pen 20mg | 0.067mg | 0.667mg | 4mg | 20mg / 300 clicks |
| CJC-1295 + Ipamorelin blend pen 20mg | 0.067mg | 0.667mg | 4mg | 20mg / 300 clicks |
| Nocturne GH, NeuroCalm & SomnaReset pens 20mg | 0.067mg | 0.667mg | 4mg | 20mg / 300 clicks |
Free Peptide Calculator UK
Working out reconstitution? Use our peptide calculator to find the bacteriostatic water volume, concentration per ml and pen clicks for any vial or pen strength.
How to Use the Pen Calculator
- Pick your pen and strength from the list (for example Retatrutide Pen 40mg).
- Type the amount in mg, or switch to mcg.
- The big orange number is how many clicks to turn the dial. Underneath you will see the exact mg, mcg and ml.
How Do You Work Out Pen Clicks?
The pen click formula is simple:
mg per click = pen mg ÷ 300
clicks = amount wanted ÷ mg per click
Example: a 40mg pen ÷ 300 = 0.133mg per click. 2mg ÷ 0.133mg = 15 clicks. The calculator does this for you so there are no decimal slips.
Retatrutide Pen Clicks (10mg, 20mg, 30mg, 40mg)
On a 40mg Retatrutide pen, 1 click = 0.133mg and a full 60-click turn = 8mg. On a 30mg pen, 1 click = 0.1mg. On a 20mg pen, 1 click = 0.067mg, and on a 10mg pen, 1 click = 0.033mg. So the same amount takes more clicks on a lower-strength pen: 2mg is 15 clicks on the 40mg pen, 20 clicks on the 30mg pen and 30 clicks on the 20mg pen. See our Retatrutide pen UK guide for more.
Tirzepatide Pen Clicks
Tirzepatide pens work exactly the same way. On a 40mg Tirzepatide pen, 1 click = 0.133mg; on a 30mg pen, 1 click = 0.1mg, so 2.5mg = 25 clicks; on a 20mg pen, 1 click = 0.067mg. More in our Tirzepatide pen UK guide.
Semaglutide Pen Clicks
Semaglutide pens come in 10mg, 20mg, 30mg and 40mg. A 10mg Semaglutide pen is 0.033mg (33mcg) per click, so 0.25mg is about 8 clicks and 0.5mg is 15 clicks. See our Semaglutide pens UK guide.
Tesamorelin, KLOW and Blend Pen Clicks
The Tesamorelin 40mg pen and Semax 40mg pen are 0.133mg per click. The KLOW 80mg pen is 0.267mg per click. The GHK-Cu + BPC-157 60mg pen is 0.2mg per click, and all our 20mg blend pens are 0.067mg per click.
Pen Calculator FAQs
How many clicks are in a 3ml peptide pen?
A full 3ml MyPep pen has 300 clicks. Each click pushes out 0.01ml, and one full turn of the dial is 60 clicks (0.6ml), so a full pen is five full turns.
How much is one click on a peptide pen?
One click is always 0.01ml. How many mg that is depends on the pen strength: 0.133mg on a 40mg pen, 0.1mg on a 30mg pen, 0.067mg on a 20mg pen and 0.033mg on a 10mg pen.
How many clicks is 2mg on a 40mg Retatrutide pen?
2mg is 15 clicks on a 40mg Retatrutide pen, because each click is 0.133mg (40mg ÷ 300 clicks). On a 30mg pen 2mg is 20 clicks, and on a 20mg pen it is 30 clicks.
How many clicks is 2.5mg on a Tirzepatide pen?
2.5mg is 25 clicks on a 30mg Tirzepatide pen, about 19 clicks on a 40mg pen and about 37 to 38 clicks on a 20mg pen. On a 10mg pen it is 75 clicks, which is more than one full turn.
How many mg is 60 clicks (one full turn)?
60 clicks is 0.6ml. That equals 2mg on a 10mg pen, 4mg on a 20mg pen, 6mg on a 30mg pen, 8mg on a 40mg pen, 12mg on a 60mg pen and 16mg on an 80mg pen.
Are pen clicks the same as syringe units?
Yes, in volume. One pen click is 0.01ml, which is the same volume as 1 unit on a U-100 insulin syringe. So 10 clicks is the same volume as 10 units (0.1ml).
What if the calculator says more than 60 clicks?
The dial on our pens goes up to 60 clicks per turn. If the figure is higher than 60, it would need more than one turn, and the calculator shows how many turns.
Is every MyPep pen the same?
Yes. Every MyPep pen uses the same 3ml cartridge and the same 60-click dial. The only difference is how many mg are in the pen, which is why the mg per click changes.
What is the difference between the pen calculator and the peptide calculator?
The pen calculator is for our pre-filled pens and tells you how many clicks. The peptide calculator is for freeze-dried vials and works out bacteriostatic water, concentration and syringe units.
Is the pen calculator free and does it give dosing advice?
It is completely free and works on any phone. It is a maths tool only and does not give dosing advice. All MyPep products are for laboratory research use only.
Using vials instead of pens? Try our free peptide calculator for reconstitution with bacteriostatic water, or browse all peptide pens UK.
This pen calculator is a maths tool only. All MyPep Biotech products are sold for laboratory research use only and are not for human consumption.
