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KLOW blend calculator

A four-peptide blend vial: GHK-Cu, BPC-157, TB-500 and KPV. Work out how much of each peptide is in one draw, from the dose of one peptide or from the units you draw.

Also calledKLOW80
Medically reviewed by Juan Pablo Frías, MD · · DisclosureUpdated Educational use only
1Vial and what is in it
mg of each peptide. Change them to match your vial label.
mg
mg
mg
mg
2Bacteriostatic water added
mL
3What you know
Calculate from
Peptide to dose by
Dose of BPC-157
mcg
4Syringe (U-100)
Draw to
5units
= 0.05 mL on a 1 mL U-100 insulin syringe
Each draw contains
  • GHK-Cu1.25 mg62.5%
  • BPC-157250 mcg12.5%
  • TB-500250 mcg12.5%
  • KPV250 mcg12.5%
Vial total
80 mg
Total mg/mL
40
Draws per vial
40
Math only. It does not recommend a dose. Each peptide's share of the draw is fixed by the vial, so you cannot dose one without the others.

KLOW: 5 units (0.05 mL) from a 80 mg vial + 2 mL water = 1.25 mg GHK-Cu, 250 mcg BPC-157, 250 mcg TB-500, 250 mcg KPV.

How the blend math works

Each peptide has its own concentration: its milligrams divided by the water you add. Whatever volume you draw, every peptide comes along in proportion. Dosing by one peptide sets the volume, and that volume sets the dose of all the others.

GHK-Cu: 50 mg ÷ 2 mL = 25 mg/mLBPC-157: 10 mg ÷ 2 mL = 5 mg/mLTB-500: 10 mg ÷ 2 mL = 5 mg/mLKPV: 10 mg ÷ 2 mL = 5 mg/mL0.25 mg BPC-157 ÷ 5 mg/mL = 0.05 mL = 5 unitsGHK-Cu: 0.05 mL × 25 mg/mL = 1.25 mgBPC-157: 0.05 mL × 5 mg/mL = 250 mcgTB-500: 0.05 mL × 5 mg/mL = 250 mcgKPV: 0.05 mL × 5 mg/mL = 250 mcg
5 units · 1.25 mg GHK-Cu · 250 mcg BPC-157 · 250 mcg TB-500 · 250 mcg KPV

What is in a KLOW vial

Amount of each peptide per KLOW vial
Peptide80 mg vial
GHK-Cu50 mg (62.5%)
BPC-15710 mg (12.5%)
TB-50010 mg (12.5%)
KPV10 mg (12.5%)
These are the typical amounts users report for KLOW vials in community discussions (Jan 2025 to Oct 2026), not a verified label. Sellers fill vials differently, so enter the amounts printed on your vial in the calculator.

Common questions

How many units of KLOW for 250 mcg of BPC-157?

In an 80 mg KLOW vial (50 mg GHK-Cu, 10 mg BPC-157, 10 mg TB-500, 10 mg KPV) mixed with 2 mL of water, BPC-157 is at 5 mg/mL, so 250 mcg is 5 units (0.05 mL) on a U-100 syringe. That same draw also contains 1.25 mg GHK-Cu, 250 mcg TB-500, 250 mcg KPV.

How much of each peptide is in 10 units of KLOW?

10 units on a U-100 syringe is 0.10 mL. From an 80 mg KLOW vial (50 mg GHK-Cu, 10 mg BPC-157, 10 mg TB-500, 10 mg KPV) with 2 mL of water, that draw holds 2.5 mg GHK-Cu, 500 mcg BPC-157, 500 mcg TB-500, 500 mcg KPV.

The peptides in KLOW

KLOW overviewNot FDA approved · unstudied blendGHK-CuCopper tripeptideGHK-Cu calculatorSingle-peptide vialBPC-157Gastric pentadecapeptideBPC-157 calculatorSingle-peptide vialTB-500Synthetic fragment of thymosin beta-4TB-500 calculatorSingle-peptide vialKPVAnti-inflammatory tripeptideKPV calculatorSingle-peptide vial
Other blends
GLOWWolverineCJC-1295 + IpamorelinTesamorelin + IpamorelinSermorelin + IpamorelinPeptide calculator

Sources

  1. 1Metric (SI) Prefixes (NIST Reference on Constants, Units, and Uncertainty)National Institute of Standards and Technology (NIST) · 2025physics.nist.govAccessed 2 Oct 2026
  2. 2BASAGLAR (insulin glargine) injection, prescribing information (DailyMed)U.S. Food and Drug Administration / DailyMed (Eli Lilly and Company label) · 2026dailymed.nlm.nih.govAccessed 2 Oct 2026

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