Organic, Spectroscopy & Materials Science Calculators
All organic, spectroscopy & materials science calculators in one place.
Degree of Unsaturation / DBE Calculator
Find the degree of unsaturation (DBE, or index of hydrogen deficiency) of any molecular formula, or straight from manual atom counts, with a plain-language explanation, possible ring/double/triple bond combinations, and full step-by-step working.
Chiral Specific Rotation & Optical Purity
Calculate specific rotation from observed rotation, path length and concentration — or solve for any of the four — and find optical purity, enantiomeric excess (ee%), and the true enantiomer split, with a built-in library of common chiral compounds and full step-by-step working.
Thin Layer Chromatography Rf Factor Calculator
Calculate the Rf (retention factor) of one or more TLC spots from the distance travelled by the compound and the solvent front, or solve for the spot or solvent-front distance instead, with relative Rf (Rx) against a reference spot, a scaled plate diagram, and full step-by-step working.
Solvent Polarity Index & Blend Miscibility
Look up the Snyder polarity index (P') and dielectric constant for 20+ common solvents, blend any two by volume ratio to find the resulting polarity and dielectric constant, and get an instant miscibility verdict, with a polarity scale diagram and full step-by-step working.
Beer-Lambert Law Spectrophotometry
Solve the Beer-Lambert Law (A = ε·l·c) for absorbance, molar absorptivity, path length, or concentration, convert freely between absorbance and %transmittance, and find an unknown sample's concentration from a calibration curve of standards — with a built-in library of common chromophores, a linearity chart, and full step-by-step working.
HPLC Column Resolution & Capacity Factor
Calculate HPLC capacity factor (k′) from retention time and dead time, resolution (Rs) between two peaks from retention times and peak widths, the selectivity factor (α), theoretical plate count (N) and plate height (H), or solve the fundamental resolution equation — with a chromatogram diagram and full step-by-step working.