Peptide
Calculator
Calculate reconstitution doses, plan protocols, build multi-peptide stacks, and estimate costs — all in one tool.
Reconstitution calculator
Concentration
2.50 mg/mL
25.0 mcg per unit
Draw Volume
20.0 units
0.200 mL
Doses Per Vial
10 doses
Vial Lasts
10 days
at 1x/day
20.0 units
0.200 mL on a 1.0 mL syringe
Medical Disclaimer
This calculator is for educational and informational purposes only. It does not constitute medical advice. All peptide therapies require a prescription from a licensed healthcare provider. Dosing information reflects common clinical ranges and may not be appropriate for your specific situation. Always consult a qualified physician before starting, modifying, or stopping any peptide therapy. Cost estimates are approximate and vary by provider.
How to Use This Calculator
Select Your Peptide
Choose from 30+ peptides with pre-loaded dosing data. Common vial sizes, dose ranges, and administration routes auto-fill.
Set Your Parameters
Adjust vial size, bacteriostatic water volume, and desired dose. The calculator updates in real-time as you change values.
Read the Syringe
The animated syringe shows exactly how many units to draw. Results include concentration, volume, and doses per vial.
Plan Your Protocol
Use the Protocol, Stack, and Cost tabs to plan your full cycle with timing, interactions, and cost estimates.
Reconstitution 101
What is reconstitution? Most peptides arrive as a lyophilized (freeze-dried) powder in a sterile vial. Before injection, you need to add bacteriostatic water (BAC water) to dissolve the powder into an injectable solution.
How much BAC water? The amount of water determines the concentration. More water = lower concentration = more volume per dose (easier to measure). Less water = higher concentration = less volume per dose (fewer injections per vial).
The math: If you add 2 mL of BAC water to a 5 mg vial, the concentration is 5 mg ÷ 2 mL = 2.5 mg/mL, or 2,500 mcg/mL. On a 100-unit syringe, each unit = 0.01 mL = 25 mcg. For a 250 mcg dose, draw 10 units.
Step-by-step technique:
- Wipe the vial top and BAC water vial with an alcohol swab.
- Draw the desired amount of BAC water into a syringe.
- Inject the water slowly into the peptide vial, aiming at the glass wall — do not spray directly onto the powder.
- Gently swirl (never shake) until the powder is fully dissolved.
- Label the vial with: peptide name, concentration, date reconstituted.
- Refrigerate immediately. Use within 14–28 days.
Syringe Units to mL Conversion
All insulin syringes use the same unit system: 100 units = 1 mL. The syringe size determines the total capacity and the precision of measurement.
| Units | 0.3 mL Syringe | 0.5 mL Syringe | 1.0 mL Syringe |
|---|---|---|---|
| 5 units | 0.017 mL | 0.010 mL | 0.050 mL |
| 10 units | 0.033 mL | 0.020 mL | 0.100 mL |
| 15 units | 0.050 mL | 0.030 mL | 0.150 mL |
| 20 units | 0.067 mL | 0.040 mL | 0.200 mL |
| 25 units | 0.083 mL | 0.050 mL | 0.250 mL |
| 30 units | 0.100 mL | 0.060 mL | 0.300 mL |
| 40 units | — mL | 0.080 mL | 0.400 mL |
| 50 units | — mL | 0.100 mL | 0.500 mL |
| 75 units | — mL | — mL | 0.750 mL |
| 100 units | — mL | — mL | 1.000 mL |
Peptide Storage Guide
| Type | Temperature | Shelf Life | Notes |
|---|---|---|---|
| Reconstituted peptides (general) | 2–8°C (36–46°F) | 14–28 days | Refrigerate immediately after mixing |
| Lyophilized (unmixed) peptides | -20°C or 2–8°C | 6–24 months | Freezer extends shelf life significantly |
| Bacteriostatic water | Room temperature | 28 days after opening | Discard if cloudy or contaminated |
| Semaglutide / Tirzepatide (brand) | 2–8°C (36–46°F) | 56 days in use | Per manufacturer instructions |