Fuller–Schettler–Giddings Diffusion Calculator

Temperature

Pressure

Molar Mass A

Molar Mass B

Collision Diameter σ_A

Collision Diameter σ_B

Characteristic Energy ε/κ_A

Characteristic Energy ε/κ_B

Output Unit

Result

Enter values and click 'Calculate D_AB' to see results...

Calculation Steps

Step-by-step calculation details will appear here after calculation.

Citation

Fuller, E.N., Schettler, P.D., & Giddings, J.C. (1966). A New Method for Prediction of Binary Gas-Phase Diffusion Coefficients. J. Phys. Chem., 70(11), 3676–3680.

Cite This Tool

ChemE Calc. (2025). Fuller-Schettler-Giddings Diffusion Coefficient Calculator [Web Application].

Applicability

Valid for dilute gas mixtures (~300–2000 K, <10 bar). For D_AB in cm²/s, use T in K, P in atm, M in g/mol, σ in Å.