Good Housekeeping took 74 formulas — 49 liquids, 19 powders, and six single-use tabs — for a spin to see how well they removed 20 common stains (oil, coffee, mascara…) from polyester and cotton to decided which are the best laundry detergents. Surprise: Powders packed the most power. For even better results on laundry day, be sure to check out our top washers.
– Unless noted, package size for powders is 48 to 56 ounces; for liquids, 50 to 64 ounces. Cost per load is based on our large, heavily soiled test load.