640 ounces in pounds
Result
The conversion result is: 640 ounces is equivalent to 40 pounds.[1]
Conversion formula
How to convert 640 ounces to pounds?
We know (by definition) that: 1 oz = 0.0625 lb.
We can set up a proportion to solve for the number of pounds.
1 oz / 640 oz = 0.0625 lb / x lb
Now, we cross multiply to solve for our unknown x:
x lb = (640 oz / 1 oz) * 0.0625 lb → x lb = 40.0 lb
Conclusion:
640 oz = 40.0 lb
Conversion in the opposite direction
The inverse of the conversion factor is that 1 pound is equal to 0.025 times 640 ounces.
It can also be expressed as: 640 ounces is equal to 1 / 0.025 pounds.
Approximation
An approximate numerical result would be: six hundred and forty ounces is about zero pounds, or alternatively, a pound is about zero point zero three times six hundred and forty ounces.
Footnotes
[1] The precision is 15 significant digits (fourteen digits to the right of the decimal point).
Results may contain small errors due to the use of floating point arithmetic.