Calculate the exact solution volume for your work. Enter your vial data and desired dose.
над 98%
verified purity
in vitro
research use only
For beginners
Fill in 4 steps and see how much water to inject and how many units to draw with the syringe. Not sure where to start? Pick a protocol below.
The amount of peptide (in milligrams) written on the vial label.
The amount of bacteriostatic water to dissolve the peptide. More water → more diluted concentration.
How many micrograms you want for one single experiment. 1 mg = 1000 mcg.
For small volumes (<0.3 ml) choose 0.3 ml for accuracy. The syringe scale is in units (U).
Live calculation
PeptidLabs
5 mg
над 98% HPLC
concentration
2,500mcg/ml
to draw
10.0/ 100 U
Concentration
2,500mcg/ml
Volume per dose
0.10ml
Syringe marking (1 ml)
10.0U / 100
[Recommended needle]
31G insulin pen needle
Very small volume - pen needle is most precise for <0.15 ml
[This vial gives you]
20doses × 250 mcg
Pick a preset protocol above to see the recommended vial, price and cycle planner.
Formula
concentration = (mg × 1000) ÷ ml
volume = dose (mcg) ÷ concentration
units = volume × syringe scale
01
Enter the peptide amount shown on the label (in mg).
02
The volume of solvent you injected into the vial.
03
The target dose per single experiment, in micrograms (mcg).
04
Usually insulin syringes - 0.3, 0.5, or 1.0 ml.
Inject the bacteriostatic water slowly down the vial wall. Do not shake - gently swirl to dissolve.
Lyophilized product - at 2–8°C. After reconstitution - refrigerated up to 28 days (with bacteriostatic water).
For small volumes (<0.3 ml), use a 0.3 ml (30 U) syringe for accurate measurement.
Standard rule is 2 ml of water per 5 mg of peptide (concentration 2.5 mg/ml). This allows precise dosing on a U-100 syringe: 100 mcg = 4 marks. You can grab bacteriostatic water 10ml — enough for 5 vials of 5mg.
A U-100 insulin syringe with a 29G or 31G needle. For small doses (<0.3 ml) use a 0.3 ml syringe for higher precision. We carry insulin syringes 29G — 10-pack for €6.90.
When reconstituted with bacteriostatic water (0.9% benzyl alcohol), a peptide is stable for 28 days refrigerated (2-8°C). After that the preservative loses efficacy. Note the first-puncture date on the vial.
Formula: dose in mcg ÷ concentration in mcg/ml = volume in ml. Volume in ml × 100 = marks on a U-100 syringe. Example for 250 mcg at 2500 mcg/ml: 250/2500 = 0.1 ml = 10 marks.
A more dilute solution means a larger volume for the same dose. It does not change the peptide's efficacy — only the math. Recalculate with the actual water volume in the calculator.
This calculator is intended for research purposes only. It does not constitute medical advice.
