You can easily convert 40 pounds into ounces using each unit definition:
With this information, you can calculate the quantity of ounces 40 pounds is equal to.
In 40 lb there are 640 oz.
Which is the same to say that 40 pounds is 640 ounces.
Forty pounds equals to six hundred forty ounces. *Approximation
Performing the inverse calculation of the relationship between units, we obtain that 1 ounce is 0.0015625 times 40 pounds.
A ounce is zero times forty pounds. *Approximation