What it calculates
Enter vial strength and BAC water volume to get concentration in mg/mL, then add a target dose to calculate mL and syringe units.
Tools
Peptide Reconstitution Calculator
Calculate peptide concentration, dose volume, syringe units, accumulation and sequence chemistry. Optional peptide shortcuts included.
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Reconstitution calculator
Enter the numbers from your vial and syringe. The tool returns concentration, volume and the unit mark to draw to.
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Best for
Quick reconstitution math for research notes, comparison tables and checking whether a draw volume matches the syringe scale.
Common searches
Peptide reconstitution calculator, BAC water calculator, peptide syringe units calculator and mg to units calculator.
Common reconstitution examples
These examples show the math only. They are not dose instructions. Change the vial amount, water volume or syringe scale in the calculator above for your actual label or protocol.
| Vial setup | Concentration | 250 mcg draw | U-100 units |
|---|---|---|---|
| 5 mg + 1 mL | 5 mg/mL | 0.05 mL | 5 units |
| 5 mg + 2 mL | 2.5 mg/mL | 0.1 mL | 10 units |
| 10 mg + 2 mL | 5 mg/mL | 0.05 mL | 5 units |
Reconstitution FAQ
How much BAC water should I add to a 5 mg peptide vial?
There is no universal amount. The water volume sets the final concentration. For example, 5 mg with 1 mL is 5 mg/mL, while 5 mg with 2 mL is 2.5 mg/mL. Follow the product label, prescriber or pharmacist instructions.
How many syringe units is 250 mcg?
It depends on the vial concentration and syringe scale. If 5 mg is mixed with 2 mL, concentration is 2.5 mg/mL. A 250 mcg dose is 0.25 mg, which equals 0.1 mL or 10 units on a U-100 syringe.
What does 10 mg reconstituted with 2 mL mean?
It means the vial contains 10 mg total in 2 mL of liquid, giving a concentration of 5 mg/mL. A 1 mg draw would be 0.2 mL, or 20 units on a U-100 syringe.
What are U-100 syringe units?
U-100 syringes are marked so 100 units equals 1 mL. One unit equals 0.01 mL. Units are volume markings, not peptide milligrams.
Is this calculator a dosing recommendation?
No. It only converts vial amount, water volume and target amount into concentration and draw volume. The target amount must come from a product label, prescriber, pharmacist or appropriate research protocol.
All calculators
Live, no-signup tools for peptide concentration, unit conversion, repeated-dose accumulation and sequence chemistry.
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Reconstitution calculator
Vial mg, BAC water mL and target dose into concentration, dose volume and syringe units.
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Accumulation calculator
Model repeated dosing over time: peak, trough, accumulation factor and steady-state timing.
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Unit converter
Convert mg, mcg, optional IU and syringe units from one reconstituted vial setup.
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Peptide chemistry calculator
Analyze sequence length, molecular weight, composition, charge, hydropathy and amino acid notation.
Use itResearch & educational purposes only
The information on PeptideStat is for educational and research purposes only and is not medical advice. Many peptides discussed are research compounds not approved for human use. Always consult a qualified healthcare professional before making any health decisions. Articles may contain affiliate links — we may earn a commission at no extra cost to you.