Reconstitution Calculator
Mass and volume in, concentration out. The arithmetic is printed beside the answer so the page can be checked, not trusted.
What this computes
- Concentration of a solution from the mass stated for the vial and the volume of diluent added.
- The inverse: the volume of that solution which contains a given mass of material.
- The two numbers most often gotten wrong by a factor of a thousand: mg and µg are three orders of magnitude apart, and the page keeps both visible.
The arithmetic
Concentration is mass over volume: a vial stated at 5 mg brought up in 2 mL is 5 / 2 = 2.5 mg/mL, which is 2,500 µg/mL, which is 2.5 µg/µL. The aliquot volume is the wanted mass divided by the concentration: 250 µg at 2,500 µg/mL is 0.1 mL. Nothing else happens on this page.
What the label mass does and does not mean
The stated vial mass is the supplier's claim about total contents. A standard certificate does not report how much of that mass is water and counterion rather than peptide. Solutions prepared from the label figure inherit that uncertainty. Where net content matters to the work, it has to come from testing, not from this page.
What this page is not
This page does arithmetic about research solutions. It carries no guidance about administering anything to any organism, no study parameters, and no compound-specific figures. The compounds this publication covers are research materials, and study design belongs to the researcher and their institution's oversight.