This program helps you to calculate the concentration of nucleic acids according to their optical density. (DNA, RNA, oligonucleotides). It is better to use {OD₂₆₀-OD₃₂₀} instead of OD₂₆₀. For a series of measurements (batch mode) you should insert in the "Absorbance OD₂₆₀" field the optical densities separated by the space.