To convert 3.4 pounds (lbs) to ounces (oz), you need to know the conversion factor between pounds and ounces. There are 16 ounces in 1 pound. Therefore, to find out how many ounces are in 3.4 pounds, you multiply 3.4 by 16.
Calculation:
3.4 lbs × 16 oz/lb = 54.4 oz
So, 3.4 pounds is equal to 54.4 ounces.