Peptide Reconstitution Calculator
Draw this amount:10units
Concentration2.5 mg/mL
Volume to inject0.10 mL
Doses per vial20
How to Use This Peptide Calculator
1
Enter Peptide Amount
Input the total milligrams (mg) in your peptide vial. Common sizes: 2mg, 5mg, 10mg.
2
Add Water Volume
Enter how much bacteriostatic water (BAC water) you'll add. More water = easier to measure small doses.
3
Set Your Dose
Enter your desired dose in micrograms (mcg). The calculator shows exact syringe units to draw.
Popular Peptide Dosage Charts
| Peptide | Common Vial | Typical Dose | BAC Water | Units to Draw |
|---|---|---|---|---|
| BPC-157 | 5mg | 250mcg | 2mL | 10 units |
| TB-500 | 5mg | 2.5mg (loading) | 2mL | 100 units |
| Semaglutide | 5mg | 250mcg | 2mL | 10 units |
| CJC-1295 | 2mg | 100mcg | 2mL | 10 units |
| Ipamorelin | 5mg | 200mcg | 2mL | 8 units |
| GHK-Cu | 50mg | 1mg | 5mL | 10 units |
| KPV | 5mg | 200mcg | 2mL | 8 units |
| Epithalon | 10mg | 5mg | 2mL | 100 units |
These are common research doses. Always verify with your protocol. This calculator is for educational purposes only.
The Math Behind Peptide Reconstitution
Concentration formula:
Concentration (mg/mL) = Peptide (mg) ÷ Water (mL)Units to draw:
Units = [Dose (mcg) ÷ 1000] ÷ Concentration × 100Example: GHK-Cu 250mcg dose
- 5mg vial + 2mL BAC water = 2.5 mg/mL
- 250mcg = 0.25mg
- 0.25mg ÷ 2.5 mg/mL = 0.10mL
- 0.10mL × 100 = 10 units on insulin syringe
Printable reconstitution chart — free
Get the reference chart by email (concentrations, µg per 10 units, formulas, storage) to keep next to your prep space.
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Discover Peptide LabUnderstanding Insulin Syringe Units
10 units = 0.10 mL
Quick Reference
- 100 units = 1 mL (full syringe)
- 50 units = 0.5 mL (half syringe)
- 10 units = 0.1 mL (1/10th syringe)
- 1 unit = 0.01 mL
Standard insulin syringes are U-100, meaning 100 units per mL. This calculator uses this standard.
Frequently Asked Questions
How do I calculate GHK-Cu reconstitution?
Divide the GHK-Cu amount (mg) by the water volume (mL) to get the concentration. Then divide your desired dose by the concentration to get the injection volume. Multiply by 100 to convert to syringe units. Our calculator does this instantly.
What is bacteriostatic water (BAC water)?
Bacteriostatic water is sterile water containing 0.9% benzyl alcohol as a preservative. It prevents bacterial growth, allowing multi-use of reconstituted peptides for 4-6 weeks when refrigerated.
How much water should I add to my peptide vial?
Common choices are 1mL, 2mL, or 3mL. More water makes small doses easier to measure accurately but means larger injection volumes. 2mL is a good balance for most peptides.
What does 'units' mean on an insulin syringe?
Insulin syringes use 'units' as measurements. Standard U-100 syringes have 100 units per 1mL. So 10 units = 0.10mL, 50 units = 0.50mL, etc.
How do I convert mg to mcg?
Multiply milligrams by 1000 to get micrograms. 1mg = 1000mcg. So a 5mg vial contains 5000mcg total.
How long do reconstituted peptides last?
With bacteriostatic water, most peptides remain stable for 4-6 weeks when refrigerated at 2-8°C. With sterile water (no preservative), use within 24-48 hours.
Can I use this calculator for any peptide?
Yes. This calculator works for any peptide including GHK-Cu, TB-500, Semaglutide, Tirzepatide, CJC-1295, Ipamorelin, GHK-Cu, and more. The math is universal.
What's the difference between mcg and IU?
Micrograms (mcg) measure mass. International Units (IU) measure biological activity. The conversion varies by peptide. This calculator uses mcg. For HGH and some others, separate IU calculators are needed.
How accurate is this peptide calculator?
The calculator performs exact mathematical calculations based on your inputs. Accuracy depends on your vial's actual peptide content and precise water measurement. For research purposes only.
Is this calculator free to use?
Yes, completely free with no signup required. For advanced features like injection tracking, body maps, and protocol management, check out our full Peptide Lab app.