Tools · Peptide Calculator
The calculator.
Reconstitution and dose maths. Every step shown.
Result
Draw to
40 Units
Exceeds one 1 mL draw — split across multiple draws
- 01Concentration
- 02Draw volume
- 03Syringe units
- Concentration
- Draw volume
- Doses per vial
Units, in plain English
MG and MCG are how much compound there is. A milligram (mg) is 1,000 micrograms (mcg) — so 5mg is 5,000mcg. Same stuff, smaller number.
IU is used instead of mg for growth hormone, hCG and HMG, because those are measured by how much they DO, not what they weigh. There is no universal mg-per-IU, so never convert between them.
ML is how much liquid is in the syringe. That is the bacteriostatic water you added — it changes how concentrated the vial is, never how much compound is in it.
UNITS are the numbers printed on the barrel. They are a measure of liquid, not compound, and how many fit in 1ml depends on the syringe you bought:
U-100
1 ML = 100 units
U-50
1 ML = 50 units
U-40
1 ML = 40 units
Check the barrel before you draw. The same dose is a different number of units on each of those three, and getting it wrong is the easiest mistake to make.
BAC water
Bacteriostatic water volume changes the concentration of your solution, not the total amount of compound available.
Bacteriostatic waterAccuracy
Always draw to the exact line on the syringe and confirm your syringe scale type before preparing your dose.
Calculated figures only — check your own measurements.
Using the calculator
Reconstitution maths, done properly
How the peptide calculator works out units per dose.
Most peptides are supplied as a lyophilised powder that has to be mixed with bacteriostatic water before use. The amount of water you add sets the concentration, and the concentration decides how far to draw the syringe for each dose.
What you need to know
- Vial strength is the milligrams of peptide in the vial, printed on the label.
- Water added is the bacteriostatic water you mix in, in millilitres.
- Dose is the amount you want per draw, in micrograms or milligrams.
The calculator turns those three numbers into units on a U-100 insulin syringe, so you never have to do the conversion by hand. Check the strength of every product against its lab report, and browse peptides for vial sizes.
