How many pounds in an ounce? Ounces to pounds (oz to lb) weight units conversion factor is 0.0625. To find out how many pounds in ounces, multiply by the conversion factor or use the converter. 1 Ounce = 0.0625 (1/16) Pound Ounce is an imperial and US customary mass unit. 1 ounce equals to 28.3495 grams.