Conversion formula

The conversion factor from pounds to ounces is 16, which means that 1 pound is equal to 16 ounces:

1 lb = 16 oz

To convert 40 pounds into ounces we have to multiply 40 by the conversion factor in order to get the mass amount from pounds to ounces. We can also form a simple proportion to calculate the result:

1 lb → 16 oz

40 lb → M_(oz)

Solve the above proportion to obtain the mass M in ounces:

M_(oz) = 40 lb × 16 oz

M_(oz) = 640 oz

The final result is:

40 lb → 640 oz

We conclude that 40 pounds is equivalent to 640 ounces:

40 pounds = 640 ounces

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 ounce is equal to 0.0015625 × 40 pounds.

Another way is saying that 40 pounds is equal to 1 ÷ 0.0015625 ounces.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that forty pounds is approximately six hundred forty ounces:

40 lb ≅ 640 oz

An alternative is also that one ounce is approximately zero point zero zero two times forty pounds.

Conversion table

pounds to ounces chart

For quick reference purposes, below is the conversion table you can use to convert from pounds to ounces