Enter your desired dose and your peptide's reconstituted concentration. The calculator converts it to the exact volume in ml and the number of units to draw on your insulin syringe.
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Don't know your concentration? Use the reconstitution calculator →
Results
Volume to inject
0.1 ml
per dose
Units on insulin syringe (U-100)
10 units
on a standard 100-unit insulin syringe
Dose confirmed
250 mcg
How this is calculated
250 mcg ÷ 2500 mcg/ml = 0.1 ml
0.1 ml × 100 = 10 units on syringe
Disclaimer: This calculator is provided for informational purposes only. Always verify results against your specific vial labelling before use. Peptidy does not provide medical advice — consult a qualified healthcare professional before beginning or modifying any protocol. Use of research peptides may be subject to legal restrictions in your jurisdiction.
At the most common peptide concentration: 2,500 mcg/ml (5mg vial + 2ml BAC water)
| Dose | Volume (ml) | Units (U-100 syringe) |
|---|---|---|
| 100 mcg | 0.04 ml | 4 units |
| 200 mcg | 0.08 ml | 8 units |
| 250 mcg | 0.1 ml | 10 units |
| 300 mcg | 0.12 ml | 12 units |
| 400 mcg | 0.16 ml | 16 units |
| 500 mcg | 0.2 ml | 20 units |
| 750 mcg | 0.3 ml | 30 units |
| 1000 mcg | 0.4 ml | 40 units |
Injection volume (ml) = Desired dose (mcg) ÷ Concentration (mcg/ml). For example: a 250mcg dose at 2,500 mcg/ml = 250 ÷ 2,500 = 0.1ml.
It depends on your concentration. At 2,500 mcg/ml (the most common — 5mg vial + 2ml BAC water): 250 ÷ 2,500 = 0.1ml = 10 units on a U-100 syringe. At 5,000 mcg/ml (5mg + 1ml): 0.05ml = 5 units.
At 2,500 mcg/ml: 500 ÷ 2,500 = 0.2ml = 20 units. At 5,000 mcg/ml: 0.1ml = 10 units.
0.25mg = 250mcg. At a common Semaglutide concentration of 3,000 mcg/ml (3mg vial + 1ml BAC water): 250 ÷ 3,000 = 0.0833ml ≈ 8 units on a U-100 syringe.
A U-100 insulin syringe (1ml capacity, 100 unit markings) is the standard for subcutaneous peptide injections. Common needle sizes are 29–31 gauge, 4–8mm length. The 1ml barrel makes small volumes easy to measure accurately.
Use the reconstitution calculator. Enter the vial size (mg) and the amount of BAC water you added (ml) — the concentration in mcg/ml is calculated instantly. You can then paste that number into this calculator.
U-100 means the syringe is calibrated for 100 units per millilitre. The markings on the barrel represent units — each unit equals 0.01ml. Most peptide calculations use this relationship: Units = Volume in ml × 100.
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