Peptide Dosage Calculator
Use this tool to convert vial strength and reconstitution volume into a per-injection amount. Educational use only — always follow clinician guidance.
If you have ever looked at a peptide vial and wondered, “How many units should I draw?”, this page is built for that exact moment. A peptide dosage calculator helps you convert three practical values — vial amount, reconstitution volume, and target dose — into a clear injection volume in milliliters (mL) and insulin syringe units.
How the peptide calculator dosage works
The calculator follows a simple concentration method:
Injection Volume (mL) = Desired Dose mcg ÷ Concentration mcg/mL
U-100 Syringe Units = Injection Volume mL × 100
Inputs explained
- Peptide in vial (mg): The amount printed on the vial label, such as 5 mg, 10 mg, or 15 mg.
- Diluent added (mL): The total bacteriostatic water or sterile diluent you add for reconstitution.
- Desired dose (mcg): Your target microgram amount per injection.
- Injections per week: Optional value to estimate how long one vial lasts.
Worked example
Suppose you have a 10 mg vial and add 2 mL diluent. You want 250 mcg per injection.
- 10 mg = 10,000 mcg total in vial
- 10,000 mcg ÷ 2 mL = 5,000 mcg/mL concentration
- 250 mcg ÷ 5,000 mcg/mL = 0.05 mL per injection
- 0.05 mL × 100 = 5 units on a U-100 insulin syringe
That means each 250 mcg injection is 0.05 mL (5 units).
Quick reference: U-100 syringe conversion
Most insulin syringes are U-100, where 100 units = 1 mL. Here is a useful conversion table:
| mL | U-100 Units |
|---|---|
| 0.01 mL | 1 unit |
| 0.05 mL | 5 units |
| 0.10 mL | 10 units |
| 0.20 mL | 20 units |
| 0.25 mL | 25 units |
| 0.50 mL | 50 units |
| 1.00 mL | 100 units |
Common mistakes that cause dosing errors
1) Mixing up mg and mcg
This is the most frequent issue. 1 mg = 1,000 mcg. A missed conversion can create a 10x or even 100x error.
2) Using the wrong reconstitution volume
Your calculations are only as accurate as your actual final volume. If you planned to add 2 mL but only added 1.8 mL, concentration changes immediately.
3) Confusing syringe types
A U-100 insulin syringe and other syringes are labeled differently. Always verify your syringe scale before measuring.
4) Ignoring practical measurability
If your result is extremely tiny (for example 0.01 mL), consider whether your syringe can measure that accurately. Some users choose a different dilution strategy to improve precision.
Tips for safer and more consistent preparation
- Write date, concentration, and peptide name on each vial after mixing.
- Use sterile technique and avoid repeated contamination of vial stoppers.
- Store reconstituted product according to professional guidance and manufacturer instructions.
- Keep a dosing log that includes date, amount, and batch/lot details.
- When uncertain, pause and re-check the math before injecting.
FAQ: peptide calculator dosage
Can this calculator tell me what dose I should take?
No. It converts a chosen dose into volume/units. It does not provide treatment recommendations.
What if my vial strength is listed in IU instead of mg?
You must first convert to mass or concentration using product-specific documentation from a trusted clinical source. IU is not universally interchangeable with mg.
Does this work for different peptides?
Yes for the arithmetic itself. The math is concentration-based and peptide-agnostic. Clinical dosing, scheduling, and safety are peptide-specific and should be medically supervised.
Why include injections per week?
It helps estimate vial longevity. If one vial gives 20 doses and you inject 4 times weekly, it lasts about 5 weeks.
Bottom line
A solid peptide calculator dosage workflow does one thing well: it removes guesswork from measurement math. Enter your vial strength, reconstitution volume, and target micrograms, then verify the resulting mL and syringe units. Use careful technique, keep records, and involve a licensed clinician for all medical decisions.