Total Dust Mass >   (6.28 e-5) · f · ρ · (<a> / μm) · (Rdust / AU)2   MEarth

 

f = infrared excess LIR/Lstar
ρ = grain density in g/cc
<a> = mean grain radius
MCeres / MEarth = 1.46 e-4
MSun / MEarth = 3.33 e5