Lab Calculator & Converter
Dilution, HPLC, UV spectroscopy, solution preparation and unit converters โ all free, no sign up required.
Dilution & Concentration
Simple Dilution (C1V1 = C2V2)
Calculate volumes for simple dilutions. Solve any of the four variables.
Serial Dilution
Calculate concentrations across serial dilution steps. Up to 20 steps.
Concentration Converter
Convert between mg/mL, ฮผg/mL, molarity, mmol/L and % w/v.
Buffer & Solution Preparation
Buffer Preparation Calculator
Prepare phosphate, acetate, Tris, HEPES and other buffers at any pH and molarity.
Standard Solution PreparationNew
Calculate how to prepare stock and working standard solutions from solid or liquid.
Weighing & Purity
Solution Preparation
Method & Analysis
Yield Calculator
Calculate percent yield for reactions and extractions.
% Recovery Calculator
Calculate percentage recovery for analytical method validation.
Solution Preparation (% w/v)
Calculate mass to weigh for a % w/v solution preparation.
HPLC Calculations
Retention Factor (k')
Calculate HPLC retention factor k' with pass/fail guidance.
Resolution (Rs)
Calculate chromatographic resolution between two peaks.
Theoretical Plates (N)
Measure column efficiency using plate count formula.
Tailing Factor
Calculate peak tailing / asymmetry factor.
Assay Calculation
Calculate assay percentage against a reference standard.
UV Spectroscopy
Beer-Lambert Law
Convert absorbance to concentration. Solve any variable.
Transmittance โ Absorbance
Convert between transmittance and absorbance instantly.
LOD / LOQ Calculator
Calculate Limit of Detection and Quantification (ICH Q2R1).
Unit Converter
Volume Converter
Convert between ฮผL, mL and L instantly.
Mass Converter
Convert between ฮผg, mg, g and kg instantly.
Temperature Converter
Convert between Celsius, Fahrenheit and Kelvin.
Pressure Converter
Convert between Pascal, atm, bar and mmHg.
Concentration Converter
Convert mg/mL, ฮผg/mL, % w/v and molarity.
Time Converter
Convert between seconds, minutes and hours.