Free Tool

Peptide Reconstitution Calculator

Enter your peptide vial size, bacteriostatic water, and desired dose — get the exact syringe units to draw, a visual guide, and optional cycle planning.

1
Syringe Size
Select your insulin syringe capacity

Selected: 50-unit syringe (0.5 mL total capacity)

2
Bacteriostatic Water
How much BAC water are you adding to the vial?

Common amounts: 1 mL (high conc.), 2 mL (standard), 3–5 mL (low conc.)

3
Peptide(s) & Dose
Enter vial size and your desired dose per injection
Peptide
mg
Results
2 mL vial

50u syringe — draw amount

10
20
30
40
50

Draw to 5.0 units

Draw per injection

5.0 units

0.050 mL

Doses per vial

40.0

2 mL ÷ 0.050 mL/dose

BAC water

2 mL

added to vial

Peptide 1

Dose per injection

250 mcg

0.2500 mg

Concentration

5.00 mg/mL

5000 mcg/mL · 10 mg in vial

Draw 5.0 units for a 250 mcg dose.

Concentration: 5.00 mg/mL — vial contains 40.0 doses (0.050 mL per dose).

E.g. 0.5 for EOD, 0.14 for once/week

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This calculator is for informational and educational purposes only. Always verify calculations manually. Peptides are research chemicals — consult a qualified medical professional before use. This is not medical advice.

How to use this calculator

  1. 1.Select your insulin syringe size — 30, 50, or 100 unit.
  2. 2.Enter the peptide vial size in mg (e.g. 5 mg for BPC-157).
  3. 3.Enter the volume of bacteriostatic water you are adding in mL (e.g. 2 mL).
  4. 4.Enter your desired dose per injection in mcg or mg.
  5. 5.Read the results — units to draw, concentration, doses per vial.
  6. 6.Optionally enter doses per day/week and cycle length to see total vials needed.

Common peptide doses for reference

ARA-2900.5–1 mg/dayCartalax2–3 mg/dayGLOW0.05–0.1 ml/dayKLOW Blend4–6 mg/dayMGF100–200 mcg3×/weekIGF-1 LR320–50 mcg/dayPEG-MGF100–200 mcgtwice/weekTesamorelin + Ipamorelin1100–1200 mcg/day

For informational reference only. Always follow your protocol and consult a qualified professional.

Understanding peptide reconstitution

Peptides are supplied as lyophilized (freeze-dried) powder and must be reconstituted with bacteriostatic water (BAC water) before injection. The concentration you achieve depends on how much BAC water you add relative to the peptide amount.

Concentration formula: Concentration (mg/mL) = Peptide amount (mg) ÷ BAC water volume (mL). For example, adding 2 mL to a 5 mg vial gives 2.5 mg/mL.

Syringe units: Insulin syringes are marked in units where 100 units = 1 mL. A 30-unit syringe holds 0.3 mL, a 50-unit syringe holds 0.5 mL, and a 100-unit syringe holds 1 mL. To calculate units to draw: (dose in mg ÷ concentration in mg/mL) × 100.

Example: If your vial is 5 mg reconstituted in 2 mL (2.5 mg/mL), and you want a 500 mcg (0.5 mg) dose — you draw 20 units on a 100-unit syringe: (0.5 ÷ 2.5) × 100 = 20 units.