Bio-Rewire
Peptide Calculator
A little clarity goes a long way. Calculate concentrations and measurement
volumes with straightforward math, built for research and education.
Reconstitution calculator
Live resultsTotal peptide in the vial
Volume of water added
A user-entered amount, not a recommended dose
Third-party chart reference only; not an established safe or effective human dose. View source
BPC-157
10 units = 0.1 mL
Simple math. Clear measurements.
Three calculations turn your vial strength and water volume into a measurement reference.
Find the concentration
5 mg ÷ 2 mL = 2.5 mg/mL
Multiply by 1,000 for 2,500 mcg/mL.
Calculate the volume
250 mcg ÷ 2,500 mcg/mL = 0.1 mL.
Use the same mass unit on both sides.
Convert to U-100 units
0.1 mL × 100 = 10 units on a U-100 syringe.
Example amounts illustrate math only.
Reconstitution considerations
Accurate math starts with accurate inputs and appropriate laboratory procedures.
Verify the compound, total mass, and diluent compatibility against the supplier’s documentation. mg and mcg are not interchangeable.
Use the specified diluent and handling method. Bacteriostatic water is not suitable for every compound or research application.
Record the concentration and preparation date. Follow compound-specific storage and stability guidance; this tool does not determine shelf life.
Common questions
Understanding the numbers,
and the limits of this tool.
What is a U-100 syringe unit?
On a U-100 syringe, 100 units corresponds to 1 mL, so 1 unit is 0.01 mL. These are volume markings, not a measure of peptide potency. This conversion does not apply to U-40 syringes or other scales.
What is the difference between mg and mcg?
One milligram (mg) equals 1,000 micrograms (mcg). For example, 0.25 mg and 250 mcg represent the same mass. Always confirm the unit on the vial and the unit of your target amount.
Does adding more water change the amount in the vial?
No. Adding more diluent lowers the concentration and increases the volume needed for a given target amount. The total labeled mass stays the same, assuming complete dissolution and no loss. The calculator assumes the entered water volume is the final solution volume.
Are the research ranges dosage recommendations?
No. The cited charts are third-party educational references and may describe community-reported patterns rather than established clinical evidence. They do not establish safety, efficacy, suitability, route, or a dose for any person. The calculator never selects or recommends a target dose.
Can I use this calculator for a peptide blend?
This draft calculates a single labeled compound, not the individual components of a blend. A blend requires each component’s mass and ratio to be considered separately. Do not apply a single-compound reference to a blend.
How accurate are the results?
The arithmetic uses the numbers you enter and displays rounded values. Actual measurements depend on the labeled strength, final solution volume, syringe markings, dead space, purity, and measurement technique. The vial dose count is a theoretical number of complete doses, excluding losses. Very small draw volumes may not be measurable reliably.