Peptide Calculator 2026 — Reconstitution, Dosage & Vial Planner
Work out exact reconstitution volumes, convert mcg doses to mL and insulin syringe units, and plan your monthly vial supply — for all major research peptides like BPC-157, TB-500, Semaglutide, and PT-141.
Reconstitute, Dose, or Plan?
Whether you’re mixing a fresh vial, working out how many units to draw, or ordering your next monthly supply, pick the tool below to get instant results.
Reconstitution Calculator
Calculate how much bacteriostatic water to add to your peptide vial
Total mg of peptide in vial
Desired strength after reconstitution
Your planned dose in micrograms
Standard U-100 insulin syringe
Reconstitution Result
Water to add, concentration, and per-dose volume
Enter your vial size and target concentration, then click Calculate Reconstitution.
Dosage Calculator
Convert your desired mcg dose into mL and syringe units
Current reconstituted strength
Target dose in micrograms
U-100 = 100 units per 1 mL
Dosage Result
Volume to draw, syringe units, and visual guide
Enter concentration and desired dose, then click Calculate Dosage.
Vial Planner
Plan how many vials you need for your protocol
Peptide per vial
Per injection
Usually 1 or 2
Injection days per week
Total protocol length
Vial Plan Result
Total vials, doses per vial, and monthly supply
Enter your vial size, dose, and protocol details, then click Calculate Vial Plan.
Common Peptide Protocols
Typical research protocols and dosing ranges for popular peptides. Always refer to published studies and verify with your research supervisor before any application.
| Peptide | Typical Dose | Notes |
|---|---|---|
| BPC-157 | 250–500 mcg × 2/day | Subcutaneous, 4–6 week cycles |
| TB-500 (Thymosin Beta-4) | 2–5 mg × 2/week | Loading phase often used |
| Semaglutide | 250 mcg weekly | Start low, titrate up |
| PT-141 (Bremelanotide) | 1–2 mg as needed | Subcutaneous, max 3×/week |
| CJC-1295 (DAC) | 1–2 mg × 1–2/week | Long-acting, DAC variant |
| CJC-1295 (No DAC / Mod GRF) | 100 mcg × 2–3/day | Short half-life, pre-meal |
| GHRP-6 | 100–300 mcg × 2–3/day | Often stacked with CJC-1295 |
| Ipamorelin | 200–300 mcg × 2–3/day | Milder than GHRP-6 |
| GHK-Cu | 1–2 mg daily | Subcutaneous or topical |
| Epithalon | 5–10 mg daily | 10–20 day cycles |
| Selank | 1–3 mg daily | Intranasal or subcutaneous |
| LL-37 | 500 mcg daily | Research antimicrobial peptide |
Peptide Calculator FAQ
Everything you need to know about reconstituting, dosing, and storing research peptides.
To reconstitute a peptide vial, divide the total mg of peptide by your target concentration (mg/mL) to get the volume of bacteriostatic water to add. For example, a 5 mg vial of BPC-157 reconstituted to 2.5 mg/mL requires 2 mL of bacteriostatic water. Always inject the water slowly down the side of the vial and never shake — swirl gently to dissolve. Store reconstituted peptides in the refrigerator (2–8°C).
Divide your desired dose in mcg by the concentration in mcg/mL. First convert mg/mL to mcg/mL by multiplying by 1000. For example, a 2.5 mg/mL solution = 2500 mcg/mL. A 250 mcg dose = 250 ÷ 2500 = 0.1 mL. On a U-100 insulin syringe (1 mL = 100 units), this equals 10 units. This calculator performs the conversion automatically.
Most research peptides are injected subcutaneously using U-100 insulin syringes. A 0.3 mL (30 unit) syringe with a 29–31 gauge needle is ideal for most doses under 300 mcg. A 0.5 mL (50 unit) syringe works well for doses between 300–500 mcg, and a 1 mL (100 unit) syringe is used for larger volumes. Always use a fresh, sterile needle for every injection.
Most reconstituted peptides remain stable for 2–4 weeks when stored in a refrigerator at 2–8°C, protected from light. Lyophilized (unmixed) peptide powder is far more stable — typically 12–24 months in the fridge, or up to 2 years when frozen at -20°C. Always use bacteriostatic water (containing 0.9% benzyl alcohol) rather than sterile water for reconstitution, as this extends shelf life by preventing bacterial growth.
Divide the total mg in the vial by your single dose in mg. For example, a 5 mg vial with a 250 mcg (0.25 mg) dose = 20 doses. This calculator can also factor in frequency (doses per day) and days per week to show how many vials you need per month.
Some peptides can be combined (stacked) in the same syringe — for example, BPC-157 and TB-500 are frequently mixed this way because they are chemically compatible. However, peptides like GHRP-6 and CJC-1295 should be drawn separately unless the supplier has pre-blended them. Never mix peptides with different pH requirements or that are known to precipitate together. When in doubt, draw them in separate syringes.
Bacteriostatic water is sterile water containing 0.9% benzyl alcohol, which acts as a preservative to inhibit bacterial growth. Unlike plain sterile water, bacteriostatic water can be used multiple times over several weeks, making it essential for reconstituting multi-dose peptide vials. It is not suitable for newborns or single-use IV applications, but is the standard solvent for research peptide storage.
“mg” stands for milligram and “mcg” (or μg) stands for microgram. There are 1000 micrograms in one milligram. Peptide vials are usually labelled in mg (e.g., 5 mg), but doses are often measured in mcg (e.g., 250 mcg). So a 5 mg vial contains 5000 mcg of peptide. This calculator handles all conversions automatically.