Beer-Lambert Calculator
Solve the Beer-Lambert law for absorbance or concentration — enter molar absorptivity, path length, and the known value for an instant result.
Interactive Tools
Free calculators, quizzes, and readiness checkers for HPLC, chromatography, and analytical method validation — no sign-up required.
Calibration & Validation Readiness Checker
A 10-question self-assessment covering instrument calibration, method validation, and system suitability practices — get an instant readiness band with suggested next steps.
Chromatography Fundamentals Quiz
Test your knowledge of core chromatography concepts — mobile and stationary phases, resolution, theoretical plates, and more — with instant feedback on every question.
Dilution Calculator
Solve C1V1 = C2V2 for any unknown volume or concentration — a fast way to work out standard and sample dilutions for volumetric analysis.
LOD/LOQ Calculator
Calculate the limit of detection (LOD) and limit of quantification (LOQ) per ICH Q2(R2) — enter the response's standard deviation and calibration slope for instant results.
Resolution Calculator
Calculate chromatographic resolution (Rs) between two adjacent peaks per USP <621> — enter retention times and peak widths for an instant Rs value.
Tailing Factor Calculator
Calculate the USP <621> tailing factor (T) for a chromatographic peak — enter the peak widths at 5% height for an instant symmetry check.
Theoretical Plates Calculator
Calculate the number of theoretical plates (N) for your HPLC column using the USP <621> tangent method — enter retention time and peak width for an instant plate count.