Look up this paper and you'll find out a quite good way to estimate this,
A. Nikoozadeh and B. Murmann, "An Analysis of Latch Comparator Offset due to Load Capacitor Mismatch," IEEE Trans. on Circuits and Systems II., Vol. 53, No.12, pp.1398-1402, Dec. 2006
BTW, ergent is not the same as *urgent*... If you want quick help, don't pronounce it as "elp!elp!elp!"