How do we calculate weight when using Particles_from_file block

[wnguyen1312]

I am calculating weight by w = real density x cell volume / nppc (where nppc = number of particles per cell). But the output density is incorrect by a factor of 100. Could you explain how to calculate the weight properly?

For example, in 2D if nppc = 10, dx = dy = 1e-4 m and dz = 1 meter. If I set a uniform density of 1e19 m^-3, is the weight of each particle 1e10?

Thank you!