How do I calculate peptide concentration after adding water?

Divide the amount in the vial by the volume of water you added. A 10 mg vial mixed with 2 mL gives 10 ÷ 2 = 5 mg/mL, which is the same as 5,000 mcg/mL.

How many units are in 1 mL on a U-100 syringe?

A U-100 insulin syringe is marked so that 100 units equal 1 mL. Each unit is 0.01 mL, so 0.25 mL reads as 25 units.

How do I convert mg to mcg?

Multiply milligrams by 1,000. 1 mg = 1,000 mcg, so 0.25 mg = 250 mcg. To go back, divide mcg by 1,000.

Can I convert units on the syringe back to an amount?

Yes. Divide the units by 100 to get mL, then multiply by the concentration. 20 units = 0.20 mL; at 5 mg/mL that holds 1 mg. The calculator does this when you type units into the units box.

Does adding more water change how much is in the vial?

No. The total in the vial stays the same. More water lowers the concentration, so the same amount takes up more volume and more units on the syringe.

Why is IU treated differently from mg?

IU measures biological activity, not weight, so there is no universal IU-to-mg rule. The calculator uses the IU count printed on your own vial label instead of guessing.

Does PeptideWhiz suggest doses?

No. PeptideWhiz never suggests or recommends an amount. Every number comes from you, and the tool only does the arithmetic. It is not medical advice.

Do I need an account to use the calculator?

No. The calculator is free and works without an account. An account only lets you save results to your stack and tracker.

BPC-157 Calculator

BPC-157 reconstitution and bacteriostatic water math, with a static mixing table. Math only, no suggested amounts.

Free · no account needed

Compound (Optional)

Desired Amount Per Dose

units (U-100)

Vial Strength (Total mg of Your Vial)

Reconstitution Solution Added

Titration Schedule (Optional)

Results

Draw to

—units

Enter amount, vial and Reconstitution Solution

ConcentrationConc.

—mg/mL

Your dose

—mg

Doses / vial

—

More than 100 units (over 1 mL). This won't fit in a single U-100 syringe draw. Double-check your numbers or use more water / a smaller amount.

U-100 Syringe · 1 mL

Notes

PeptideWhizpeptidewhiz.app · research use only

Research use only (RUO). Results are math on the values you enter only, not a recommendation or prescription for human use. Not medical advice. Always verify your own measurements. Full disclaimer

About BPC-157

A 15-amino-acid peptide derived from a protein in gastric juice, so it's naturally present in the body.

BPC-157 dosage: reported research ranges · What is BPC-157? · BPC-157 in the library · Main peptide calculator

How much bac water for BPC-157: mixing table

Concentration = vial amount ÷ water added. U-100 units for 1 mg = 1 ÷ concentration × 100. Example vial sizes only; use the amount printed on your own label. This is math, not a dose.

Vial	Water added	Concentration	Units per 1 mg (U-100)
2 mg	1 mL	2 mg/mL	50 units
2 mg	2 mL	1 mg/mL	100 units
2 mg	3 mL	0.666667 mg/mL	150 units
5 mg	1 mL	5 mg/mL	20 units
5 mg	2 mL	2.5 mg/mL	40 units
5 mg	3 mL	1.66667 mg/mL	60 units
10 mg	1 mL	10 mg/mL	10 units
10 mg	2 mL	5 mg/mL	20 units
10 mg	3 mL	3.33333 mg/mL	30 units

BPC-157 research record

Research record, not a recommendation

Study records in the PeptideWhiz library whose titles name BPC-157. None of these numbers are used by the calculator.

BPC-157 calculator FAQ

How much bacteriostatic water for a 5 mg BPC-157 vial?

There is no single required amount; the water volume only sets the concentration. With 5 mg and 2 mL the concentration is 2.5 mg/mL. The table on this page shows the math for common vial sizes and water volumes.

How do I convert BPC-157 mg to units?

Units on a U-100 syringe = amount (mg) ÷ concentration (mg/mL) × 100. The calculator does this for an amount you type.

Does this page suggest a BPC-157 dose?

No. The calculator dose field starts empty and PeptideWhiz never suggests, recommends or calculates an amount for anyone. The study list is a research record, not a protocol.

What research on BPC-157 is in the PeptideWhiz library?

2 study records whose titles name BPC-157 are listed below, each linked to its PeptideWhiz study page.

Sources

Study records: the PeptideWhiz study library pages linked above. Unit math: see the main calculator.

Math only, not medical advice. Reviewed by the PeptideWhiz team on November 5, 2026. For research and education only.