Fineness Modulus (FM) Calculator

Enter weight retained on each sieve (in grams). Default sample weight = 1000 g.

Sample weight (g)

Auto-normalize to sample?
No (use entered weights) Yes (scale weights so sum = sample weight)

Sieve (mm)	Weight retained (g)	% Retained	Cumulative % Retained

Sum of cumulative % (standard sieves excluding pan): 0

Fineness Modulus (FM) = Sum / 100 = 0.00

FM is calculated using cumulative % retained on the standard sieves (4.75, 2.36, 1.18, 0.600, 0.300, 0.150 mm). Pan is excluded from the FM sum.