unit for veritical integrated moisture convergence ( Reposting)

[madan sigdel]

Dear Users

Please tell me the standard unit for moisture convergence/divergence
[-hdivg(qu, qv)]calculated using grads.

 First I have calculated vertical integrated moisture flux (qu, qv) and unit
as kg/m s. I think this unit is right as specific humidity is kg/kg,
pressure is hPa and wind in m/s. After this using same moisture flux I want
to calculate the convergence/divergence. In some papers the unit is
mentioned as mm/day. How can I get it.
Please suggest me.

Thank you,
madan