Concentration, molarity, dilution and aliquots for peptide stock solutions — calculated in seconds. Choose the compound, contents and solvent volume.
Blend of several peptides — no single molar mass.
Calculation aid for laboratory and in vitro work. No information on human or veterinary use.
c [mg/ml] = m [mg] ÷ V [ml]
c [mM] = c [mg/ml] ÷ M [g/mol] × 1000
V1 = C2 × V2 ÷ C1
Lyophilized peptides are dissolved in a solvent before laboratory use (reconstitution). The amount of solvent you add determines the concentration of the stock solution. The calculator handles the conversion between mass, volume and amount of substance for you.
Contents (mg) and volume (ml) give the mass concentration in mg/ml — identical to µg/µl. Using the molar mass, the calculator also converts to millimoles per liter, which is more commonly used in cell culture and receptor assays.
For experiments, the stock solution is usually diluted further. Enter the target concentration and final volume: the calculator shows how much stock solution to take and how much buffer or medium to add.
Dividing the stock solution into equal portions avoids repeated freeze-thaw cycles. The calculator shows the number of aliquots and the amount of compound per aliquot.
Research Use Only. All SunPept products are intended exclusively for scientific research and laboratory purposes and are not for human or veterinary use.
Concentration (mg/ml) = amount of compound in the vial (mg) ÷ solvent volume (ml). Example: 10 mg in 2 ml gives 5 mg/ml, which equals 5 µg/µl.
Molarity (mmol/l) = concentration (mg/ml) ÷ molar mass (g/mol) × 1000. For Retatrutide (approx. 4731 g/mol), 5 mg/ml corresponds to about 1.06 mM. Blends such as GLOW or KLOW have no single molar mass.
C1 is the concentration of the stock solution, V1 the volume needed from it, C2 the desired working concentration and V2 the final volume. Rearranged: V1 = C2 × V2 ÷ C1. The remainder up to V2 is made up with buffer or medium.
Repeated thawing and freezing can affect peptide solutions. Small aliquots, taken individually, reduce freeze-thaw cycles and the risk of contaminating the stock solution.
1 mg = 1,000 µg = 1,000,000 ng. Likewise for volumes, 1 ml = 1,000 µl. A concentration of 1 mg/ml therefore equals 1 µg/µl.
No. Pens contain the compound already pre-dissolved; the contents are stated on the product page. The calculator is intended for lyophilized vials.
No. The calculator is purely a calculation aid for laboratory and in vitro work (stock solutions, dilutions, aliquots). It contains no information on human or veterinary use. All products are intended exclusively for research purposes.
All products on SunPept are intended exclusively for scientific research and laboratory purposes (Research Use Only). They are not for human or veterinary use, not for consumption, and not intended for therapeutic purposes.
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