Peptide mass, volume
& concentration calculator

Research-only arithmetic for mass, volume and concentration of lyophilised peptides.

This laboratory calculator works out concentration and volume for a Dr. Pepti™ single-compound vial. Choose the product and strength, enter the solution volume you have used and the sample mass you need. The calculator shows the vial mass, the concentration of the solution and the volume that contains your sample mass, in mg, µg, ml and mg/ml. It is intended exclusively for in vitro research, not for human or animal use.

Results

– ml

Volume containing the sample mass

Vial mass: – mg = – µg
Solution volume: – ml
Concentration: – mg/ml = – µg/ml
Sample mass: – mg = – µg
Sample volume: – ml

Arithmetic only, for in vitro research. Not for human or veterinary use and not a dosing tool.

About this calculator

The calculator divides the vial mass by the solution volume you enter to give the concentration in mg/ml. It then divides your sample mass by that concentration to give the volume that contains the sample mass.

Only Dr. Pepti™ single-compound products and strengths are listed. Blends are excluded because their composition cannot be expressed as one concentration. The calculator does not suggest volumes, doses or administration.

Quick conversions

1 mg = 1000 µg
1 ml = 1000 µl
1 mg/ml = 1000 µg/ml

How the result is worked out

Concentration: vial mass (mg) ÷ solution volume (ml) = mg/ml
Sample volume: sample mass (mg) ÷ concentration (mg/ml) = ml
Arithmetic check: 10 mg in 2 ml gives 5 mg/ml, so 250 µg (0.25 mg) is in 0.05 ml

Frequently asked questions

Which values do I enter?: The solution volume you have used in your own validated procedure and the sample mass you need. The calculator does not suggest either value.
How do I convert mg to µg?: 1 mg equals 1000 µg. You can enter the sample mass in either unit.
Why can the sample mass not be more than the vial mass?: The vial cannot contain more than its stated mass, so a larger sample mass cannot be taken from one vial.
Why are blends not listed?: A blend holds more than one compound, so a single concentration figure would not describe it.