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LL-37 dosage calculator
LL-37 vials are commonly labelled 5 mg, 10 mg. This calculator divides the vial mass by the diluent volume you enter to show concentration, then converts your own target amount into millilitres and syringe units. It states no dose, chooses no amount and stores nothing.
This page is a calculation tool. The amounts you enter are values you decided; this page states no dose and gives no medical advice.
LL-37 vial concentration grid
This table answers one arithmetic question: what concentration results when a labelled vial mass is divided by a measured diluent volume? It does not select either value.
| Vial mass | Diluent | Concentration | Same concentration |
|---|---|---|---|
| 5 mg | 0.5 mL | 10,000 mcg/mL | 10 mg/mL |
| 5 mg | 1 mL | 5,000 mcg/mL | 5 mg/mL |
| 5 mg | 1.5 mL | 3,333.33 mcg/mL | 3.333 mg/mL |
| 5 mg | 2 mL | 2,500 mcg/mL | 2.5 mg/mL |
| 5 mg | 2.5 mL | 2,000 mcg/mL | 2 mg/mL |
| 5 mg | 3 mL | 1,666.67 mcg/mL | 1.667 mg/mL |
| 5 mg | 5 mL | 1,000 mcg/mL | 1 mg/mL |
| 10 mg | 0.5 mL | 20,000 mcg/mL | 20 mg/mL |
| 10 mg | 1 mL | 10,000 mcg/mL | 10 mg/mL |
| 10 mg | 1.5 mL | 6,666.67 mcg/mL | 6.667 mg/mL |
| 10 mg | 2 mL | 5,000 mcg/mL | 5 mg/mL |
| 10 mg | 2.5 mL | 4,000 mcg/mL | 4 mg/mL |
| 10 mg | 3 mL | 3,333.33 mcg/mL | 3.333 mg/mL |
| 10 mg | 5 mL | 2,000 mcg/mL | 2 mg/mL |
LL-37 physical-property record
LL-37 is a much larger peptide than KPV
PubChem lists LL-37 with formula C205H340N60O53 and molecular weight 4,493 g/mol. Cayman supplies an LL-37 trifluoroacetate salt and reports a still higher formula mass for its specified material. These physical records show that LL-37 is not interchangeable with the neighboring short-peptide entries. The salt form and sequence identity must be preserved beside any vial mass. Sources: PubChem: LL-37 compound record · Cayman Chemical: LL-37 TFA specification.
Water solubility for the LL-37 TFA reference
Cayman reports water solubility at 20 mg/mL and storage at -20 C for its LL-37 TFA product. That result belongs to the named catalog material and does not determine the liquid volume for another vial. The calculator leaves its volume field editable, uses the measured value entered by the user and does not infer handling from the compound name alone. Sources: Cayman Chemical: LL-37 TFA specification.
Sequence and counterion are essential record fields
For LL-37, a certificate sequence is especially useful because the name denotes a defined peptide rather than a general family label. Record the sequence reference, TFA or free-form status, source, lot, purity statement and labelled mass. PubChem supports the free peptide identity, while Cayman describes one TFA product. Neither source authenticates an unrelated research vial or guarantees equivalent physical behavior. Sources: PubChem: LL-37 compound record · Cayman Chemical: LL-37 TFA specification.
A distinct arithmetic page, not a copied KPV body
The calculator still performs the same deterministic mass and volume equations, but its physical context is specific to LL-37: a different formula, molecular size, salt specification and supplier solubility result. None of those facts selects a target amount. The page states no dose, gives no protocol and keeps the cited material properties separate from the user-entered arithmetic. Sources: PubChem: LL-37 compound record · Cayman Chemical: LL-37 TFA specification.
How to use the calculator
- Read the total mass from your own vial label and enter it in milligrams.
- Enter the diluent volume you actually measured, not an intended or remembered value.
- Enter your own target amount and select the calibration printed on your syringe barrel.
- Record the concentration with the result so the syringe-unit figure remains interpretable later.
Source and identity record
Use the compound reference page and these external database searches when checking identity: PubMed literature search for LL-37 · PubChem compound database · PubChem: LL-37 compound record · Cayman Chemical: LL-37 TFA specification. A database record does not authenticate a vial.
Frequently asked questions
How much bacteriostatic water for a 5 mg LL-37 vial?
This calculator does not choose a diluent volume. Enter the volume you decided to add to the 5 mg vial and it will show the resulting concentration. The page supplies arithmetic, not an instruction.
How much bacteriostatic water for a 10 mg LL-37 vial?
There is no universal volume selected by this page. Use the value you measured or were instructed to use; the calculator then divides the 10 mg label mass by that volume.
Does the LL-37 calculator recommend a dose?
No. The target amount is always entered by the user. The tool provides no starting amount, maximum amount, progression, frequency or schedule.
Why does the syringe calibration matter?
A syringe unit is a volume marking. U-100, U-50 and U-40 barrels use different numbers of units per millilitre, so the same solution volume produces different markings.
Related pages
Stop recalculating this every time
PepCycle stores each vial once — mass, diluent volume, concentration — and converts automatically for every entry after that, in both directions, including entries you backdate.
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Last updated · Written by Aykut Yilmaz. All calculations run in your browser; no values are transmitted or stored.