5 lbs to oz

5 lbs = 80 oz

Multiply by 16, because one avoirdupois pound is divided into exactly 16 ounces: 5 lb × 16 = 80 oz.

Divide by 16: 80 oz ÷ 16 = 5 lb. Both units belong to the same system, so the inverse step is the standard check on a shipping or recipe weight.

Because this is the avoirdupois pound, the one used for groceries, parcels and body weight, and it splits into 16 ounces. So 5 lbs comes to 80 oz here. The troy pound of precious metals holds only 12 troy ounces, and the same weight quoted in troy would give a different figure.