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 21 pounds into ounces we have to multiply 21 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

21 lb → M_(oz)

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

M_(oz) = 21 lb × 16 oz

M_(oz) = 336 oz

The final result is:

21 lb → 336 oz

We conclude that 21 pounds is equivalent to 336 ounces:

21 pounds = 336 ounces

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 ounce is equal to 0.0029761904761905 × 21 pounds.

Another way is saying that 21 pounds is equal to 1 ÷ 0.0029761904761905 ounces.

Approximate result

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

21 lb ≅ 336 oz

An alternative is also that one ounce is approximately zero point zero zero three times twenty-one 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