All calculatorsOrganic Chemistry Calculators & Converters
Solve reaction problems faster — and actually understand the chemistry behind them.
Activation Energy Calculator
Compute Eₐ or k₂ using the Arrhenius equation with steps
Actual Yield Calculator
Find actual, percent, or theoretical yield with unit conversion
Arrhenius Equation Calculator
Calculate k, activation energy, or k₂—clear steps and plot included
Beer-Lambert Law Calculator
Calculate absorbance, concentration, path length, or molar absorptivity
Cube Volume Calculator
Instant cube volume from edge or diagonal, with unit conversion.
DNA Concentration Calculator
Calculate DNA concentration from A260 or convert ng/µL and nM
Entropy Calculator
Calculate entropy changes for gases, heating, and phase changes
Equilibrium ICE-Table Calculator
Calculate chemical equilibrium using ICE tables, Q vs K, and steps
Isoelectric Point (pI) Calculator
Compute protein or amino acid pI from pKa values with clear steps
pH Calculator
Calculate pH, pOH, or ratios for acids and bases
Protein Concentration Calculator
Calculate protein concentration via A280, standard curves, and dilutions.
Resuspension Calculator
Calculate resuspension volume, concentration, or mass for reagents and oligos
Water Hardness Calculator
Compute hardness from ions or EDTA—ppm, gpg, and dH