Free Reconstitution Math Tool
Peptide Reconstitution Calculator
Calculate peptide concentration, liquid volume, and U-100 syringe units from the labeled vial amount, bacteriostatic water volume, and amount entered into the calculator.
Loading calculator...
Looking for a BAC water calculator?
Use the dedicated BAC water calculator if you specifically want to compare how different liquid volumes change concentration and syringe-unit math.
Open BAC Water CalculatorHow the peptide reconstitution calculator works
The calculator starts with the amount listed on the vial and the liquid volume entered. Dividing those values gives the solution concentration. The entered amount can then be converted into mL and U-100 syringe units.
Enter the vial amount
Use the amount printed on the vial, such as mg, mcg, or IU depending on the compound.
Enter the liquid volume
The calculator uses the entered mL value to determine the resulting concentration.
Enter the amount to convert
The tool converts that amount into the equivalent liquid volume and U-100 syringe units.
Peptide reconstitution math example
For a simple example, a 10mg vial with 2mL of liquid produces a concentration of 5mg/mL. If the amount being converted is 250mcg, that equals 0.25mg, which corresponds mathematically to 0.05mL or 5 units on a U-100 syringe scale.
10mg ÷ 2mL = 5mg/mL
250mcg = 0.25mg
0.25mg ÷ 5mg/mL = 0.05mL
0.05mL × 100 = 5 U-100 units
This is an educational math example only. It is not a dosing, preparation, or administration recommendation.
Peptide-specific reconstitution calculators
32 calculatorsOpen this directory when you want a calculator preloaded for a specific compound. New BACToBasics peptide guides are added here automatically.
Peptide-specific reconstitution calculators
32 calculatorsOpen this directory when you want a calculator preloaded for a specific compound. New BACToBasics peptide guides are added here automatically.
Other reconstitution tools
Use the BAC water calculator for liquid-volume comparisons, the reverse BAC water calculator when you want to choose target U-100 syringe units first, the unit converter for mg/mcg/mL/U-100 conversions, or the beginner guide for a step-by-step explanation of reconstitution math.
Related peptide comparisons and stacks
5 linksOpen these links if you want to compare related compounds or read commonly discussed combination guides.
Related peptide comparisons and stacks
5 linksOpen these links if you want to compare related compounds or read commonly discussed combination guides.
Peptide Reconstitution Calculator FAQ
Tap a question to expand only the answer you want to read.
How does a peptide reconstitution calculator work?
A peptide reconstitution calculator uses the labeled vial amount and liquid volume to determine concentration. It can then convert an entered amount into the equivalent liquid volume and U-100 syringe units.
How do you calculate peptide concentration?
Divide the amount in the vial by the liquid volume. For example, 10mg divided by 2mL equals 5mg/mL. This is concentration math only, not a preparation recommendation.
How many U-100 syringe units are in 1mL?
On a U-100 syringe scale, 1mL corresponds to 100 units. Therefore, 0.1mL corresponds to 10 units and 0.5mL corresponds to 50 units.
Can this calculator handle mg and mcg?
Yes. BACToBasics supports milligrams and micrograms and automatically accounts for the 1mg = 1,000mcg relationship in the calculation.
Can this calculator handle HCG in IU?
Yes. The HCG calculator uses IU directly rather than converting IU into mg or mcg.
Does adding more bacteriostatic water change the total amount in the vial?
No. Changing the liquid volume changes concentration, not the original total amount in the vial.
BACToBasics provides educational information and math tools only. This calculator is not medical advice, dosing advice, injection instruction, or a recommendation to use any peptide or medication.