Free Peptide Dosage Calculator

This free peptide dosage calculator helps researchers calculate the exact syringe units needed for any peptide research dose. Enter your vial strength in milligrams, your bacteriostatic water volume in millilitres and your target dose in micrograms. The calculator returns your result instantly.

Peptide Dosage Calculator
// research reference tool — v2.0 Developed By TechHikers.com
Research Use Only. This calculator is for informational and research reference purposes only. Nothing on this page constitutes medical advice. Always consult a licensed healthcare professional before using any peptide compound.
Select Peptide
Dose Parameters
Typical range: 200–500 µg
Results
0.050 mL
Volume to inject
5.0
IU on syringe
2,500
µg/mL conc.
40
doses/vial
Syringe Visualization
Draw to the 5.0 IU mark — concentration: 2,500 µg/mL
Weekly Dose Schedule
Vial & Dosing Setup
Reconstitution Results
Final Concentration
2,500 µg/mL
Volume per dose 0.100 mL
IU on syringe 10.0 IU
Doses per vial 20 doses
Concentration vs Water Volume (5mg vial)
Step-by-Step Protocol
1
Warm up the vials. Remove the peptide vial and BAC water from the fridge. Let both sit at room temperature for 15–20 minutes. Cold liquids cause excessive foaming and can degrade the peptide.
2
Sterilize the stoppers. Wipe the rubber stopper of both vials with a fresh alcohol swab. Let them dry completely before inserting the needle.
3
Draw the BAC water. Use a clean 3 mL syringe. Draw the required BAC water volume based on your calculation above.
4
Inject slowly down the side wall. Tilt the vial so the water runs down the glass wall rather than hitting the lyophilized powder directly. This prevents denaturation.
5
Swirl — do not shake. Gently roll and swirl until fully dissolved. The solution should be clear and colorless. Shaking can break peptide bonds.
6
Store correctly. Refrigerate at 2–8°C. Most reconstituted peptides remain stable for 30–60 days. Label with the date. Keep away from light.
7
Draw your dose carefully. Clean the stopper before each injection. Draw slightly past your target, tap to remove air, then adjust to the exact IU mark shown in the calculator.
Typical Dosing Range by Peptide (µg)
Half-Life Comparison (hours)
Administration Frequency Guide
PeptideFrequencyTiming
Complete Reference Table
PeptideLowCommonHighHalf-LifeRouteCategory

How to Use the Peptide Dosage Calculator

The calculator works with three inputs. Enter your values and the result appears instantly.

Enter Vial Strength

Enter total peptide in your vial in milligrams (mg). Common sizes: 2mg, 5mg, 10mg.

Enter BAC Water Volume

Enter bacteriostatic water volume in millilitres (ml) that you added during reconstitution.

Enter Target Dose

Enter your target research dose in micrograms (mcg) per application.

Read Your Result

Syringe units (U-100), volume in ml, and total doses per vial are all calculated instantly.

How Peptide Dosage Is Calculated

3-step formula with worked examples — beats all 3 competitors.

5mg ÷ 2ml = 2,500 mcg/ml

250mcg ÷ 2,500 = 0.10ml

0.10ml × 100 = 10 units

Peptide Dosage Reference Table

Common vial/BAC water combinations with syringe units — zero competitors have this

Vial Size Bac Water Concentration 250mcg Dose 500mcg Dose Total Doses (250mcg)
5mg 1ml 5,000 mcg/ml 5 units / 0.05ml 10 units / 0.10ml 20 doses
5mg 2ml 2,500 mcg/ml 10 units / 0.10ml 20 units / 0.20ml 20 doses
10mg 2ml 5,000 mcg/ml 5 units / 0.05ml 10 units / 0.10ml 40 doses
10mg 4ml 2,500 mcg/ml 10 units / 0.10ml 20 units / 0.20ml 40 doses

Reconstitution Basics for Researchers

BAC water guide, storage info, syringe types — supporting content.

Bacteriostatic water contains 0.9% benzyl alcohol as a preservative. It allows multi-use over several weeks. Sterile water has no preservative and is only suitable for single-session use.

Most researchers use a 1ml U-100 insulin syringe. Each unit = 0.01ml. Also available in 0.3ml (30 units) and 0.5ml (50 units) sizes. This calculator returns results in U-100 units.

More water = lower concentration = larger syringe volumes per dose. Most researchers use 1-2ml for a 5mg vial. Use the BAC Water Calculator for precise guidance.

Store reconstituted solution at 4°C in a refrigerator. Stable for up to 30 days with BAC water. Protect from light. Avoid repeated temperature changes.

Need a Calculator for a Specific Compound?

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Frequently Asked Questions

7 questions — FAQ schema target for featured snippets.

How do I calculate peptide dosage?

Divide vial mg x 1000 by BAC water ml to get concentration. Divide target mcg by concentration to get ml. Multiply by 100 for U-100 syringe units. The calculator does all three steps automatically. 

How many units for 250mcg on a U-100 syringe?

Depends on BAC water amount. 5mg vial + 2ml BAC water = 10 units. 5mg vial + 1ml BAC water = 5 units. Use the calculator above for any combination.

Does this calculator work for any peptide?

Yes. The formula is the same for every peptide compound. Enter your vial strength, BAC water volume and target dose for any compound.

What is bacteriostatic water?

BAC water contains 0.9% benzyl alcohol as a preservative. It allows reconstituted peptide solutions to be stored and drawn from over multiple sessions. Sterile water has no preservative and is single-use only.

How many doses in a 5mg vial?

Depends on your dose and BAC water volume. A 5mg vial with 2ml BAC water at 250mcg per dose = 20 doses. The calculator shows total doses automatically.

What syringe should I use for peptide research?

A 1ml U-100 insulin syringe is the standard for peptide research. Each unit = 0.01ml. This calculator returns results in U-100 units by default.

How do I store reconstituted peptides?

Store at 4 degrees Celsius in a refrigerator. Stable for up to 30 days with BAC water. Protect from light and avoid repeated temperature changes.