Use this KLOW calculator to turn a KLOW blend vial, your bacteriostatic water volume, and a dose into the exact mL and units to draw — and to see how much GHK-Cu, BPC-157, TB-500 and KPV each draw delivers. This page covers the math only; KLOW is a research blend, not an approved medicine.
- Common vial
- 80 mg blend
- Typical label
- 50 + 10 + 10 + 10 mg
- Common syringe
- U-100 insulin
- Last reviewed
Quick math example
An 80 mg KLOW vial mixed with 4 mL gives 20 mg/mL. A 2 mg total dose is 0.1 mL, which equals 10 units on a U-100 syringe.
What is in a KLOW vial
KLOW is a four-peptide blend sold in a single vial. It is most commonly labelled as 50 mg GHK-Cu, 10 mg BPC-157, 10 mg TB-500 and 10 mg KPV, for 80 mg in total. Labels do vary between suppliers, so check the amounts printed on your own vial before you calculate.
Because the four peptides are mixed in one vial, every draw contains all four in the same ratio. With the common 50/10/10/10 label, GHK-Cu is 62.5% of each draw and BPC-157, TB-500 and KPV are 12.5% each.
- GHK-Cu 50 mg (62.5%) · BPC-157 10 mg (12.5%) · TB-500 10 mg (12.5%) · KPV 10 mg (12.5%)
- Total = 80 mg — enter this as the vial amount
- The ratio is fixed: you cannot draw more of one peptide than the others
How the KLOW calculation works
Enter the vial's total milligrams (80 mg for the common label), your water volume, and the total amount of blend you want per dose. The calculator returns concentration, mL and syringe units exactly as it would for a single peptide.
To see what one draw contains, multiply the total dose by each peptide's share. A 2 mg draw from a 50/10/10/10 vial is 1.25 mg GHK-Cu (2 × 0.625) and 0.25 mg — 250 mcg — each of BPC-157, TB-500 and KPV (2 × 0.125).
- 80 mg / 4 mL = 20 mg/mL of total blend
- 2 mg total / 20 mg per mL = 0.1 mL = 10 units
- Per draw: 1.25 mg GHK-Cu + 250 mcg BPC-157 + 250 mcg TB-500 + 250 mcg KPV
How much BAC water for an 80 mg KLOW vial
4 mL gives 20 mg/mL, so every 10 units on a U-100 syringe is 2 mg of blend (1.25 mg GHK-Cu and 250 mcg of each other peptide) and 20 units is 4 mg. 3 mL gives about 26.7 mg/mL, where 10 units is about 2.67 mg of blend. 2 mL gives 40 mg/mL, where 10 units is 4 mg.
More water makes small doses easier to read but needs a vial that can hold it — check the fill capacity before adding 4 mL. An 80 mg vial holds forty 2 mg doses, which is longer than many reconstituted beyond-use windows, so plan around that date too.
- 80 mg / 4 mL = 20 mg/mL → 10 units = 2 mg blend, 20 units = 4 mg
- 80 mg / 3 mL = 26.7 mg/mL → 10 units ≈ 2.67 mg blend
- 80 mg / 2 mL = 40 mg/mL → 10 units = 4 mg blend
Dosing KLOW by one peptide
Protocols are often written around one component — for example "250 mcg of BPC-157". To turn that into a total KLOW dose, divide by that peptide's share: 250 mcg ÷ 0.125 = 2 mg of blend. Enter 2 mg as the dose and the calculator gives the draw; the GHK-Cu, TB-500 and KPV come along in the fixed ratio.
If you need the peptides in a different ratio, a blend is the wrong tool — use separate vials and calculate each on its own page.
- Total dose = component dose ÷ component share
- 250 mcg BPC-157 ÷ 0.125 = 2 mg of KLOW
- Different ratios need separate single-peptide vials
KLOW vs GLOW
GLOW is the same blend without KPV: usually 50 mg GHK-Cu, 10 mg BPC-157 and 10 mg TB-500, for 70 mg in total. The shares change (GHK-Cu about 71%, BPC-157 and TB-500 about 14% each), so a draw sized for one blend delivers different amounts from the other. Use the calculator for the blend on your label.
Frequently asked questions
What is KLOW peptide?
How much BAC water should I add to KLOW?
How much BPC-157 is in a KLOW dose?
Can I change the ratio of peptides in a KLOW vial?
Does this calculator recommend a KLOW dose?
Primary sources
Background references for this calculator. PepSync does not make clinical claims; these citations support the educational context only.


