In market, the fabric is available in 36" inches or 44" inches width-wise, mostly 36" width fabric is good but if you got 44" width fabric then there will be difference of one fourth meter.
Mega - Two pieces :
Mega 1-PCS :
Kali Salwar : Joint salwar or four panels salwar -
High Neck Kurta / front back open neck kurta / lucknowi kurta / Princess line Kurta :
4 kali Kurta:
twice the length and half meter extra, but if you are stitching kurta with maximum kali then take one meter extra.
Safari Collar need twice in length with 1 meter extra fabric.
Full Umbrella kurta:
It require 4 to 5 meter fabric with 44" width.
Straight Trouser/ Pencil trouser / capri trouser: these trouser need twice in length with 36" width fabric. But if you want to stitch the wide folded ankle hole trouser then 6 inch take extra fabric in length.