Free Web Tool

Sieve Analysis & Gradation

Plot a semi-log gradation curve from sieve % passing data and compute D10, D30, D60, Cu, Cc with well-graded check.

Inputs

Edit % passing per sieve. Tool plots semi-log gradation curve and computes D10, D30, D60, Cu, Cc.
SieveOpening (mm)% Passing
Standards
  • ASTM D6913 / AASHTO T 27 sieve sizes.
  • D-values interpolated logarithmically between adjacent sieves.
  • Cu = D60/D10. Cc = D30²/(D60·D10). Well-graded sand: Cu≥6, 1≤Cc≤3.

Results

D10
D30
D60
Cu
Cc
Gradation