Physical Chemistry calculators
Half-Life Calculator Solve radioactive decay for remaining amount, elapsed time, or half-life. Also converts between half-life, decay constant, and mean lifetime with a decay schedule.
Open Partial Pressure Calculator Calculate partial pressure using Dalton's law, the ideal gas law, or Henry's law. Supports 5 pressure units, multi-component breakdown, and reverse-solve.
Open Radioactive Decay Calculator Calculate remaining amount, activity in Bq/Ci, mean lifetime, and specific activity. Solve for time, half-life, or initial quantity with isotope presets.
Open Diffusion Coefficient Calculator Calculate the diffusion coefficient using Stokes-Einstein, Fick's First Law, diffusion time scaling, or mean squared displacement. Switch units instantly.
Open Langmuir Isotherm Calculator Calculate Langmuir adsorption: solve for q, Ce, qmax or KL, get the separation factor RL, linearized Ce/q form, mass-balance mode, and isotherm curve chart.
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