Preptide- Concentration 5 mg2 mL= 2.5 mg/mL
- Volume to draw 0.25 mg2.5 mg/mL= 0.1 mL
- On a U-100 syringe 0.1 mL × 100 = 10 units
Same vial. Read it as 20 and you draw double.
The example dose250 mcg
One mark too far500 mcg
The dose calculator and private tracker for people managing their own GLP-1s and peptides. Get your units right in seconds, then log every shot in one place.
Free calculator. No signup. Informational only, not medical advice.
If you draw it up and inject it yourself, this is built for you.
Not on the list? The calculator still works, just enter the numbers. Free, no signup. Information only. It does not sell, recommend, or endorse anything. Not medical advice.
Reconstitution, concentration, syringe units. Slide the plunger one mark too far and you have drawn twice what you meant to. Preptide turns that whole chain into one number you can read straight off the syringe.
Same vial. Read it as 20 and you draw double.
Worked example for a 5 mg vial in 2 mL of bacteriostatic water at a 250 mcg dose. Preptide displays the math for your own numbers, it does not give medical advice or recommend any dose.
Reconstitution and the exact units to draw, for any vial, in seconds. Watch a real syringe fill to the line, it even splits big doses across syringes.
Try the free calculator →Log each dose, rotate injection sites, and watch weight and streaks over time.
Snap the label and the app fills in the compound and strength for you.
A body map remembers where your last shots went, so you never double up.
Titration schedules and reminders keep your protocol on track automatically.
Enter the peptide and your bacteriostatic water. We set the concentration.
One tap. We track the units, the site, and the timing for you.
Weight, doses, and streaks, all in one clean view over time.
Type your vial and dose, watch a real syringe fill to the exact line. If a dose is too big for one syringe, it splits it into the right number of draws.
Open the calculatorMixing and injecting your own GLP-1 or peptide at home used to be a niche thing. In a couple of years it went normal. Here is how fast.
Sources: KFF Health Tracking Poll, May 2024 and Nov 2025, and U.S. GLP-1 prescription trend data. Shown for context, not a claim about Preptide.
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