Peptide Dosage Calculator Australia
Work out reconstitution volumes, dose draws and doses per vial for any research peptide or blend, including BPC-157, TB-500, Retatrutide and the GLOW and KLOW blends.
0.3 mL (30 units)
0.5 mL (50 units)
1.0 mL (100 units)
0.3 mL (30 units)
0.5 mL (50 units)
1.0 mL (100 units)
New to peptide research in Australia? Start with our peptide information hub for guides on every research peptide we stock.
Reconstitution is the process of mixing a lyophilised (freeze-dried) research peptide, whether that is BPC-157, TB-500, or a multi-peptide blend like GLOW or KLOW, with bacteriostatic water to create a liquid solution that can be measured and drawn into a syringe.
Three numbers determine everything: how many milligrams (mg) of peptide are in the vial, how many millilitres (mL) of water you add, and how many micrograms (mcg) you want in a single dose. Once you know those, this calculator works out the concentration of your mixed solution, exactly how far to draw the syringe plunger, and how many full doses you'll get from the vial.
- Check your vial and target dose. Confirm the total milligrams (mg) of peptide in your vial (printed on the label) and decide on your target dose in micrograms (mcg) before you reconstitute anything.
- Add bacteriostatic water. Draw your chosen volume of bacteriostatic water into a syringe and inject it into the vial, aiming the needle at the inside wall of the vial rather than directly onto the peptide powder.
- Dissolve the peptide. Gently swirl or roll the vial between your hands until the powder fully dissolves. Don't shake it - vigorous agitation can damage the peptide structure.
- Draw your dose. Use the calculator above to find the exact unit mark on your syringe for your chosen dose, based on the concentration you've just created.
As a general rule, adding more water gives a more diluted solution and a larger draw volume per dose, which is useful if you want finer control over small doses. Adding less water gives a more concentrated solution and a smaller draw volume. For a deeper walkthrough, see our peptide reconstitution guide.
Every PhaseOne peptide is independently HPLC-tested for purity. See our HPLC testing guide and browse the full COA library before you order.
This calculator is provided for research and educational purposes only. All PhaseOne products are intended strictly for laboratory research and are not for human consumption.
- Confusing milligrams (mg) and micrograms (mcg). Most peptide doses are measured in mcg, while vials are typically labelled in mg. A decimal point in the wrong place can mean a 1000x error.
- Reading the wrong syringe scale. Insulin syringes are marked in "units," not mL. Always confirm which syringe size (0.3mL/30u, 0.5mL/50u or 1mL/100u) you're using before drawing.
- Changing the water volume without recalculating. If you reconstitute with more or less bacteriostatic water than planned, the concentration changes and your previous draw volume no longer applies.
- Assuming every peptide in a blend doses equally. In multi-peptide blends, including popular combinations like GLOW (70mg), KLOW (80mg) and our BPC-157 + TB-500 blend, each peptide can have a different mg content, so the draw volume can differ between peptides even in the same syringe pull. Use the "Peptide blends" tab above to calculate each one correctly.
- Ignoring dead space in the syringe. A small amount of solution can remain in the needle and hub after drawing, which matters more for very small doses.
- Storing reconstituted peptides incorrectly. Once mixed with water, most peptides should be refrigerated and used within their documented timeframe. See our peptide storage guide for details.
How to calculate peptide dosage
Peptide dosage comes down to three numbers: the milligrams in the vial, the millilitres of bacteriostatic water you add, and the micrograms you want in a single draw. Work those out once and the syringe reading follows. Here is the arithmetic on a 10mg vial.
- The vial holds 10mg, which is 10,000mcg.
- Add 2ml of bacteriostatic water. 10mg divided by 2ml gives 5mg per ml, or 5,000mcg per ml.
- For a 250mcg draw: 250 divided by 5,000 equals 0.05ml.
- On a 1ml (100 unit) insulin syringe, 0.05ml is 5 units.
- Doses per vial: 10,000mcg divided by 250mcg gives 40 draws.
Change any one number and the calculator above redoes the rest. Add more water and the draw volume grows while the dose stays the same, which is the easiest way to get finer control over very small amounts.
Common vial sizes and starting volumes
Common starting points for the peptides PhaseOne stocks. Any volume works, so treat these as a reference rather than a rule, and use the calculator above for anything not listed.
| Peptide | Vial | Bac water | Concentration | 250mcg draw |
|---|---|---|---|---|
| BPC-157 | 5mg | 2ml | 2.5mg per ml | 10 units |
| BPC-157 | 10mg | 2ml | 5mg per ml | 5 units |
| TB-500 | 10mg | 2ml | 5mg per ml | 5 units |
| BPC-157 + TB-500 blend | 20mg | 3ml | 6.7mg per ml | 4 units |
| GLOW blend | 70mg | 5ml | 14mg per ml | 2 units |
| KLOW blend | 80mg | 5ml | 16mg per ml | 1.5 units |
| Retatrutide | 10mg | 2ml | 5mg per ml | 5 units |
| Melanotan II | 10mg | 2ml | 5mg per ml | 5 units |
| 5-Amino-1MQ | 10mg | 2ml | 5mg per ml | 5 units |
| GHK-Cu | 50mg | 5ml | 10mg per ml | 2.5 units |
Blend rows show the combined milligrams in the vial. Because each peptide in a blend sits at a different ratio, use the "Peptide blends" tab above to work out each component separately. For GLOW and KLOW dosage specifically, the blends tab splits the vial into its individual peptides for you.
Reading syringe units
Insulin syringes are marked in units, not millilitres, and that mismatch causes most dosing errors. One unit is 0.01ml on every size, so a 30 unit syringe holds 0.3ml, a 50 unit holds 0.5ml and a 100 unit holds 1ml. Smaller barrels spread the same volume across more visible space, which is why a 0.3ml syringe is easier to read for tiny draws.
PhaseOne supplies BD Ultra-Fine 1ml (100 unit) syringes with alcohol wipes in the Syringe Kit, or with bacteriostatic water included in the Starter Kit.
Frequently asked questions
Bacteriostatic water is sterile water containing a small amount of benzyl alcohol, which helps inhibit bacterial growth so a reconstituted vial can be used across multiple draws rather than once. It's the standard diluent used for reconstituting lyophilised research peptides across Australia. Read our full bacteriostatic water guide, or shop bacteriostatic water directly.
Syringe size depends on your draw volume. A 0.3mL (30 unit) syringe gives the finest precision for small draw volumes, while 0.5mL (50 unit) and 1mL (100 unit) syringes suit larger volumes. The calculator above shows the exact unit mark to draw to for whichever syringe you select.
It changes the volume needed to deliver the same dose, not the total amount of peptide in the vial. More water means a more dilute solution, so you draw a larger volume to get the same mcg dose, and vice versa with less water.
Yes. The "Peptide blends" tab calculates reconstitution and draw volume for each peptide in a blend individually, since popular Australian blends like GLOW (70mg) and KLOW (80mg) combine multiple peptides in different mg ratios. Shop GLOW (70mg) or KLOW (80mg) directly, or browse our full range of research peptides for sale in Australia.
No. This tool is provided for research and educational purposes only, based on standard reconstitution mathematics. It does not constitute medical, dosing or clinical advice, and PhaseOne products are intended for laboratory research use only.
Yes. Searches for bpc 157 dosage calculator and bpc-157 dosage calculator land here, and the singular peptides tab handles both the 5mg and 10mg vials. The table above lists common starting volumes for each. Shop BPC-157 or read the BPC-157 research guide.
Yes. The blends tab is built for exactly that. A bpc-157 tb-500 blend dosage calculator has to split the vial into its two peptides, since each sits at a different mg content, and the tab does that rather than treating the whole vial as one compound. Shop the BPC-157 + TB-500 blend.
The same way as any single peptide. A 10mg vial with 2ml of bacteriostatic water gives 5mg per ml. Retatrutide australia dosage questions usually mean reconstitution volume rather than a protocol, and the calculator covers every vial size from 5mg to 60mg. See the Retatrutide research guide or shop Retatrutide.