Silica Sand AFS
Calculator

Calculate the AFS grain fineness number from sieve analysis results. Learn the classification and recommended use of your foundry sand.

Sieve Analysis

AFS Grain Fineness Number

Enter the percentage of sand retained on each sieve. Total should be 100%.

6 mesh(×3)

12 mesh(×5)

20 mesh(×10)

30 mesh(×20)

40 mesh(×30)

50 mesh(×40)

70 mesh(×50)

100 mesh(×70)

140 mesh(×100)

200 mesh(×140)

270 mesh(×200)

Pan(×300)

AFS = Σ(Retained% × Multiplier) / Σ(Retained%)

As the AFS number increases, sand becomes finer. Finer sands give better surface finish but reduce permeability.

High quality silica sand supply for the foundry sector. Stock available in various grain sizes, AFS 40-70.