Tools

Peptide reconstitution calculator

Enter the vial amount and desired dose, then compare BAC water options or calculate U-100 units from a known BAC volume.

Calculator

Syringe view

Drag to rotate. Shows where the calculated draw lands on the selected syringe, using the assumed BAC volume until one is entered or solved. Not a dosing recommendation.

Barrel

Needle

Assumed BAC water

10 units on a 0.3 mL barrel (at 2 mL BAC water)

Vial amount

Equivalent: 10,000 mcgUse the total amount printed on the vial. 1 mg = 1,000 mcg.

Desired dose

Equivalent: 0.5 mgUse the dose amount you already decided to calculate against. This is arithmetic only, not a suggested dose.

BAC water options

Common BAC water amounts calculated from the vial amount and desired dose entered above.

BAC water added	Concentration	mg per U-100 unit	Desired-dose draw on U-100
1.00 mL	10 mg/mL	0.10 mg/unit	5.0 units0.05 mL
2.00 mL	5.00 mg/mL	0.05 mg/unit	10 units0.10 mL
2.50 mL	4.00 mg/mL	0.04 mg/unit	12.5 units0.125 mL
3.00 mL	3.333 mg/mL	0.0333 mg/unit	15 units0.15 mL
4.00 mL	2.50 mg/mL	0.025 mg/unit	20 units0.20 mL
5.00 mL	2.00 mg/mL	0.02 mg/unit	25 units0.25 mL

Exact calculator

Use this after the table when you want to solve one specific setup.

Target U-100 draw

U-100

Needed to solve BAC water. U-100 units are syringe markings, where 100 units = 1 mL.

Target draw- mL target drawThis mode solves how much BAC water makes the desired dose equal the U-100 units you entered.

Calculated diluent volume- mLThe BAC volume that makes the desired dose match your target U-100 units.

Concentration- mg/mLtotal vial mg / BAC water mL

Desired dose draw- mLdesired dose / concentration

U-100 insulin syringe units- units1 unit = 0.01 mL

Approximate vial portions20total vial amount / desired dose amount

Total vial amount10 mgnormalized from mg or mcg input

Local vial cards

Save arithmetic snapshots in this browser. Nothing is uploaded.

Card label

No saved vial cards yet.

What it calculates

BAC water options for the desired dose
U-100 syringe units when BAC water is already added
Concentration in mcg/mL
mL draw volume for the desired dose
Approximate vial portions at that amount
Browser-local vial cards for saved calculations

Why units matter

Vial amount plus desired dose gives concentration once BAC water is chosen. To solve BAC water directly, also enter the U-100 syringe mark you want the desired dose to land on.

Worked examples

BPC-157, 10 mg vial + 2 mL BAC: 5 mg/mL, so 250 mcg is 0.05 mL, 5 units on a U-100 syringe.
BPC-157, 5 mg vial + 1 mL BAC: 5 mg/mL, so 250 mcg is again 5 units.
TB-500, 10 mg vial + 2 mL BAC: 5 mg/mL, so a 2.5 mg amount is 0.5 mL, 50 units.
Ipamorelin, 5 mg vial + 2 mL BAC: 2.5 mg/mL, so 250 mcg is 0.1 mL, 10 units.
Retatrutide, 10 mg vial + 1 mL BAC: 10 mg/mL, so a 2 mg weekly amount is 0.2 mL, 20 units.
Semaglutide, 5 mg vial + 1.5 mL BAC: about 3.33 mg/mL, so 0.5 mg is 0.15 mL, 15 units.

Storage and reconstitution basics Evidence methodology