Calculating Parking area to car ratio

Hi mga master, ask ko lang po sana kung paano po yung pag-estimate ng car parking. for example po my lot area is 200 sq.m. at balak gawing ground/ open parking ng owner, paano po madedetermine roughly/estimate yung capacity or number of cars na kayang i-accomodate nung lote. how about po kung sa underground naman, the lang po ba? thanks po mga master. more power

diba dipende rin kung pano circulation ng driveway mo at area na kakainin...

1 car required 25 sq. mts space for surface parking---from online source

thank you for sharing sir