A growing library of free GC calculators built for chromatographers, instrument engineers, and lab users. These free tools help you work faster, cut manual steps, and improve accuracy across your daily GC workflow.
Detection Limit (LOD) Calculators
Calculators to compute LOD and LOQ using different analytical approaches.
By S/N Ratio & Peak Height
Calculate LOD from noise level and peak height of a known standard
By S/N Ratio & Peak Area – Peak Width
Calculate LOD from noise level, peak area and peak width of a known standard
By Standard Deviation of Blanks
Calculate LOD using 3 standard deviations from a series of blank runs.
By Standard Deviation of a Standard
Calculate LOD using 3 standard deviations from a series of known standard runs.
By Residual Standard Deviation
Calculate LOD using residual standard deviation and slope of a calibration curve
FID Relative Response Factor (RRF) Calculators
Calculators to compute RRF by Mole, Mass, Volume and other calculators related to RRF
FID RRF for Gas Samples
Calculate RRF with number of carbon atoms, hydrogen atoms, molecular weight and compressibility
FID RRF for Liquid Samples
Calculate RRF with number of carbon atoms, hydrogen atoms, molecular weight and (relative) density
FID RRF for Unknown Peaks
Calculate response factor and concentration of unknown GC peaks using FID relative response factors
FID RRF Verification
Compare the difference between Experimental RRF and Theoretical RRF
FID Peak Area Normalization
Calculate amount% for up to 6 compounds using peak area and relative response factor.
FID Methanizer RRF Calculator
Determines relative response factors between CO, CO₂, and CH₄ using concentration and peak area data.
Other Utility Calculators
Essential utility calculators for everyday gas chromatography work.
Molar Mass Calculator
Calculate molecular weight by combining up to four different atoms and their quantities.
Gas Sample Loop Calculator
Calculate how long of a tubing to cut to achieve a specific loop volume using ID or OD-Wall
Gas Cylinder Duration Calculator
This gas cylinder duration calculator estimates how long a gas cylinder will last.
Unit Converter
Converters to convert common units (temperature, pressure, volume, length…) used in GC work
Temperature Unit Converter
Convert a temperature value instantly between Celsius, Fahrenheit, and Kelvin
Pressure Unit Converter
Convert pressure values instantly using this pressure unit converter for psi, kPa, MPa, and bar.
Length Unit Converter
Convert length values instantly for millimeters, centimeters, meters, inches, and feet.
Volume Unit Converter
Convert volume values instantly using this volume unit converter for µL, mL, L, cm³, and ft³.
Mass Unit Converter
This mass unit converter lets you quickly convert between ng, µg, mg, g, kg, and lb.
Flow Rate Converter
This flow rate converter allows you to quickly convert between mL/min, L/min, mL/h, L/h, sccm, and scfm.
Weight Concentration Converter
Fast conversion between Weight Fraction, Weight %, ppm (wt), ppb (wt), mg/kg, µg/kg, µg/g, and mg/g.
Mole Concentration Converter
Fast conversion between Mole Fraction, Mole %, ppm (mol), ppb (mol), mmol/mol, µmol/mol and nmol/mol.
Volume Concentration Converter
Fast conversion between Volume Fraction, Volume %, ppm (vol), ppb (vol), mL/L, µL/L and µL/mL
Solution Concentration Converter
Fast conversion between mg/mL, µg/mL, mg/L, µg/L, g/100 mL, mol/L, mmol/L and µmol/L.