Enter how much peptide is in the vial and how much diluent you add. The calculator gives the concentration and, optionally, the volume of solution that contains a target amount - useful for preparing aliquots and working solutions.
Check units twice: 1 mg = 1,000 mcg. The calculator does arithmetic only.
The formulas
Concentration (mg/mL) = peptide in vial (mg) ÷ diluent added (mL)
Concentration (mcg/mL) = concentration (mg/mL) × 1,000
Volume holding a target amount (mL) = target (mcg) ÷ concentration (mcg/mL)
Worked example
A 10 mg vial reconstituted with 2 mL of diluent holds 10 ÷ 2 = 5 mg/mL, which is 5,000 mcg/mL. To prepare a working aliquot containing 250 mcg, you would draw 250 ÷ 5,000 = 0.05 mL of the solution.
Picking a convenient volume
Because the volume of diluent is your choice, pick one that makes the numbers round. For a 10 mg vial, 2 mL gives exactly 5 mg/mL and 1 mL gives 10 mg/mL. Very small target volumes are harder to measure accurately, so a more dilute solution can be easier to work with. The reconstitution guide covers technique, and storage covers what to do with the solution afterwards.
Frequently asked questions
What is the formula for peptide concentration?
Concentration (mg/mL) = peptide in the vial (mg) / diluent added (mL). Multiply by 1,000 for mcg/mL.
What is the most common mistake?
Mixing up milligrams and micrograms. 1 mg is 1,000 mcg, so a slip of the unit is a thousand-fold error.
Related products
Keep reading
Research use only. All products sold by Moleano Peptides are intended solely for laboratory research. They are not for human or veterinary use and are not drugs, supplements or medical devices. This guide is educational and is not medical advice.