Peptide Reconstitution Calculator
Professional dosing calculator for research peptides with safety protocols
Popular Peptide Quick-Select
Reconstitution Calculator
Draw to this mark on insulin syringe:
Volume: 0.1 mL
100-unit insulin syringe
Concentration
2,500 mcg/mLDoses per Vial
20 dosesCost per Dose
-- if vial cost enteredHow Peptide Reconstitution Works
Peptide reconstitution transforms lyophilized (freeze-dried) powder into an injectable solution through a precise process that preserves peptide integrity while enabling accurate dosing.
Step-by-Step Reconstitution Process
- Prepare your workspace: Clean surface, alcohol swabs, sterile technique
- Remove vial cap: Pop off the plastic cap and swab the rubber stopper with alcohol
- Draw bacteriostatic water: Use a fresh insulin syringe to draw the calculated amount
- Inject water slowly: Insert needle and inject water down the side of the vial—never spray directly onto the powder
- Gentle mixing: Swirl the vial gently (never shake) until powder fully dissolves
- Calculate concentration: Peptide mg ÷ water mL = mg/mL, then multiply by 1000 for mcg/mL
- Store properly: Refrigerate immediately at 36-46°F, away from light
Example Calculation
Scenario: 5mg BPC-157 vial + 2mL bacteriostatic water, targeting 250mcg dose
- Total peptide: 5mg × 1000 = 5,000mcg
- Concentration: 5,000mcg ÷ 2mL = 2,500mcg/mL
- Dose volume: 250mcg ÷ 2,500mcg/mL = 0.1mL
- Syringe units: 0.1mL × 100 = 10 units
Dosing Safety Guide
⚠️ Start Low, Titrate Up
Begin with the lowest effective dose and gradually increase. This minimizes side effects and allows your body to adapt. Monitor your response for at least one week before adjusting.
💉 Injection Technique
Subcutaneous: Most peptides (belly, thigh, arm). Intramuscular: Rare cases only. Rotate injection sites to prevent lipodystrophy. Use 29-31G needles for comfort.
❄️ Storage Requirements
Reconstituted peptides last 3-4 weeks refrigerated (36-46°F). Never freeze liquid peptides. Store in original vial with rubber stopper. Protect from direct light.
🧼 Sterile Technique
Never reuse needles or syringes. Alcohol swab injection sites and vial tops. Use bacteriostatic water, not regular saline. Wash hands thoroughly before handling.
Research Disclaimer: This information is for research purposes only. Peptides discussed are research chemicals not approved for human consumption. Consult with a qualified healthcare provider before using any research peptides.
GLP-1 Dosing Schedules
GLP-1 receptor agonists like semaglutide and tirzepatide require gradual dose escalation to minimize gastrointestinal side effects. Follow these evidence-based protocols:
Semaglutide Weekly Schedule
| Weeks | Dose | Units (5mg/2mL) |
|---|---|---|
| 1-4 | 0.25mg | 10 units |
| 5-8 | 0.5mg | 20 units |
| 9-12 | 1.0mg | 40 units |
| 13+ | 1.7mg | 68 units |
| Max | 2.4mg | 96 units |
Tirzepatide Weekly Schedule
| Weeks | Dose | Units (10mg/4mL) |
|---|---|---|
| 1-4 | 2.5mg | 100 units |
| 5-8 | 5.0mg | 200 units (2 inj) |
| 9-12 | 7.5mg | 300 units (3 inj) |
| 13-16 | 10mg | 400 units (4 inj) |
| 17+ | 12.5mg | 500 units (5 inj) |
Unit Conversion Reference
Weight Conversions
- 1 mg = 1,000 mcg
- 1 gram = 1,000 mg
- 5 mg = 5,000 mcg
- 10 mg = 10,000 mcg
Volume Conversions
- 1 mL = 100 units (insulin syringe)
- 0.1 mL = 10 units
- 0.5 mL = 50 units
- 1 mL = 1 cc
Common Syringe Sizes
- 0.3 mL = 30 units max
- 0.5 mL = 50 units max
- 1.0 mL = 100 units max
- All use same needle gauge
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Frequently Asked Questions
How do I reconstitute peptides?
Remove vial cap, swab with alcohol, draw bacteriostatic water into syringe, inject water slowly down side of vial (don't spray directly on powder), gently swirl (never shake), then calculate concentration using peptide mg ÷ water mL = mg/mL.
How many units is 250mcg of BPC-157?
For a 5mg BPC-157 vial reconstituted with 2mL bacteriostatic water, 250mcg equals 10 units on a 100-unit insulin syringe. The calculation: 5mg = 5000mcg, 5000mcg ÷ 2mL = 2500mcg/mL, 250mcg ÷ 2500mcg/mL = 0.1mL = 10 units.
How much bacteriostatic water should I use?
Common ratios are 1-3mL bacteriostatic water per 5mg peptide vial. More water makes easier measurement but takes more storage space. Less water means higher concentration but smaller syringe measurements.
How long do reconstituted peptides last?
Reconstituted peptides last 3-4 weeks when stored refrigerated (36-46°F) away from light. Never freeze reconstituted peptides. Lyophilized powder can be stored at room temperature before reconstitution.
What size syringe should I use for peptides?
Use insulin syringes: 0.3mL (30 units) for small doses, 0.5mL (50 units) for medium doses, 1mL (100 units) for larger doses. All use the same needle gauge (typically 29-31G) for comfortable subcutaneous injection.
What is the correct semaglutide dosing schedule?
Standard semaglutide escalation: 0.25mg (weeks 1-4) → 0.5mg (weeks 5-8) → 1mg (weeks 9-12) → 1.7mg → 2.4mg weekly. Always start low and titrate up gradually to minimize side effects.