How often should you wash jeans?
Wash jeans every 4-6 wears for typical use, or when they smell or look dirty rather than on a fixed schedule. Denim's tight weave resists odor and oil buildup better than looser fabrics, so it stays fresh longer. Frequent washing breaks down the fibers and fades the dye faster than normal wear, shortening the lifespan of your jeans.
Get styling guidance built around your own wardrobe
Clad9 is building the app that applies answers like this one to clothes you actually own, for whatever's next on your calendar.