It depends on your hips as well. I know for me since I'm a 28 waist, but my hips are at 36, women's size 2 fit perfect on me, though I always do need to find short length pants as well. Female pants do have a length category but it ranges as short, regular (no letter), or long. Which I believe short carries as around 30 to 32 inseam, regular would carry around 34 to 36 inseam, and long would be something as 38 inseam or something to that avail, but I could be wrong, all I know is regular length I have serious issues with being way too long.
If my sizing is correct a 0 is a 26 waist, then the number generally represents an additional inch to the waist. So in that sense you would be a 15 in women's jeans. Best way to figure it out is just go to the stores grab sizes ranging as where you think you are and check sizes two up and down, to get a better feel for how the waist and hip ratio would work out.
Kate <3