How to convert pounds to (avoirdupois) ounces. To calculate an ounce value to the corresponding value in pounds, just multiply the quantity in pound by 16 (once the are sixteen ounces in a pound). Pound to ounces formula Ounces = Pounds x 16 Example: How many ounces in a quarter pound? We know that Ounces = Pounds x 16, so, 1/4 x 16 = 16/4 = 4 ...