Skip to content
PeptidesFinder

Free research tool

Peptide Reconstitution Calculator

Convert vial size, bacteriostatic water volume and target dose into the exact insulin-syringe units to draw, then see what an amount of peptide costs at the three cheapest vendors in our price index. Everything runs in your browser.

Reconstitution calculator

Enter your vial, diluent and target dose — the syringe updates live.

mg
ml
mcg

Toggling converts the value between micrograms and milligrams.

010203040506070809010020.0

U-100 Insulin Syringe (100 units)

20.0 units

Dosing instructions

For a dose of 500 mcg, draw the syringe to 20 units.

Concentration
2.5 mg/ml
Volume to draw
0.2 ml
Syringe units
20 / 100
Syringe type
U-100 insulin

What an amount costs

The three cheapest retail listings per milligram in our price index, in US dollars.

Of 500 mcg, the dose above.

mg

Or type the milligrams you want to price.

1 dose of 500 mcg is 0.5 mg of BPC-157.

  1. Cheapest right nowWholesale Peptides Company10 mg vial · $10.14 · $1.01/mg
    ≈ $10.141 vial · 10 mg
    Price checked 9d ago
  2. 2nd cheapestAmino Annex40 mg vial · $43.00 · $1.07/mg
    ≈ $43.001 vial · 40 mg
    Price checked today
  3. 3rd cheapestPeptiNova100 mg vial · $115 · $1.15/mg
    ≈ $1151 vial · 100 mg
    Price checked 2mo ago

Whole vials at the listed price, before shipping, tax or any coupon. Prices are each vendor's own, as last checked by us; the vendor's page is the final word. Ordered by price per milligram and nothing else.

See the full BPC-157 price comparison

How the Math Works

The calculator applies four simple steps — the same ones you can verify by hand:

1. Concentration

Peptide quantity (mg) ÷ bacteriostatic water (ml) = concentration in mg/ml. A 5 mg vial with 2 ml of water is 2.5 mg/ml.

2. Volume per dose

Desired dose (mg) ÷ concentration (mg/ml) = volume to draw in ml. A 500 mcg (0.5 mg) dose at 2.5 mg/ml is 0.2 ml.

3. Syringe units

Volume (ml) × 100 = units on a U-100 insulin syringe. 0.2 ml equals the 20-unit mark.

4. Cost of an amount

Milligrams wanted ÷ vial size, rounded up to whole vials, × the listed price. 42 mg from 10 mg vials takes five vials.

Understanding the Inputs

Peptide quantity
The total amount of lyophilized peptide in your vial, in milligrams (mg) — printed on the vial label.
Bacteriostatic water
The volume of diluent you add to reconstitute the peptide, in milliliters (ml). This sets the concentration.
Desired dose
The amount of peptide per administration, in micrograms (mcg) or milligrams (mg) — the toggle converts between the two.
Syringe volume
The size of your U-100 insulin syringe (0.3, 0.5 or 1.0 ml), which sets the maximum draw and the tick spacing.

Frequently Asked Questions

How many units is 1 ml on an insulin syringe?
On a standard U-100 insulin syringe, 1 ml equals 100 units, so each unit mark represents 0.01 ml. Drawing 0.2 ml therefore means drawing to the 20-unit mark.
How much bacteriostatic water should I add to a peptide vial?
Any practical volume works — the water only changes the concentration, not the total amount of peptide in the vial. More water means more units per dose, which makes small doses easier to measure accurately on the syringe. Common volumes are 1, 2 or 3 ml.
What is the difference between mcg and mg?
1 milligram (mg) equals 1,000 micrograms (mcg). Peptide vials are usually labelled in mg while research doses are often described in mcg, so the calculator lets you enter the dose in either unit and converts between them.
Does the calculator store or send my inputs anywhere?
No. All calculations run locally in your browser — nothing you type is stored or transmitted.
Where do the prices in the cost panel come from?
From the PeptidesFinder price index: the three cheapest retail listings per milligram for the peptide you pick, in US dollars, at each vendor’s listed price as of our last check, with the age of that check beside it. Listings are ordered by price per milligram and nothing else.
How is the cost of an amount worked out?
The amount is the milligrams you type, or the dose above times the number of doses you enter. It is divided by the size of the listing and rounded up, because vials are bought whole, then multiplied by the listed price. Shipping, tax and coupons are not included, and a listing with no price or size on file shows no cost rather than an estimate.
Browse peptide guidesBenefits, side effects and cited studies for every peptide in the database.Compare vendorsThird-party testing, COAs and community reviews across research suppliers.