Conversion formula

The conversion factor from ounces to pounds is 0.0625, which means that 1 ounce is equal to 0.0625 pounds:

1 oz = 0.0625 lb

To convert 640 ounces into pounds we have to multiply 640 by the conversion factor in order to get the mass amount from ounces to pounds. We can also form a simple proportion to calculate the result:

1 oz → 0.0625 lb

640 oz → M_(lb)

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

M_(lb) = 640 oz × 0.0625 lb

M_(lb) = 40 lb

The final result is:

640 oz → 40 lb

We conclude that 640 ounces is equivalent to 40 pounds:

640 ounces = 40 pounds

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 pound is equal to 0.025 × 640 ounces.

Another way is saying that 640 ounces is equal to 1 ÷ 0.025 pounds.

Approximate result

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

640 oz ≅ 40 lb

An alternative is also that one pound is approximately zero point zero two five times six hundred forty ounces.

Conversion table

ounces to pounds chart

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