Main content

### Course: 4th grade > Unit 14

Lesson 5: Converting units of mass# Converting pounds to ounces

There are 16 ounces in 1 pound. Learn to convert pounds to ounces. Created by Sal Khan and Monterey Institute for Technology and Education.

## Want to join the conversation?

- Are there smaller units of measure other than nano grams? If so, what are they?(13 votes)
- Here is the order (lowest to highest):

Decigram

Centigram

Milligram

Microgram (mcg)

Nanogram (as you said)

Picogram

Femtogram

Attogram

Zeptogram

Yoctogram(6 votes)

- There two fish caught at a fishing competition, one weighed 31 lbs and 17lbs 2 oz. What is difference in weight?(13 votes)
- The difference in weight is 14 lbs and 2oz.(4 votes)

- Is it fair to say we can place the unit we're trying to solve for (in this case ounces) "across" from the starting term, therefore always placing the opposite term in the opposite position? For some reason the way Sal instructs to place the unit in the opposite position and 'cancel out' confuses me.(4 votes)
- I think what you're saying is correct if you mean the unit that cancels goes in the numerator of the first ratio and the denominator of the second ratio. I also get confused when Sal does that, but it's something you'll need in the higher maths and sciences. If your way gets you
**the right answer with the right units**keep going, you should be fine. Good Luck!(7 votes)

- Can you explain DIMENSIONS in detail ?(5 votes)
- I don't get it! Can someone please help me?(4 votes)
- How to compare 7 pounds to 120 ounces(2 votes)
- How can I convert onuce to pounds not pounds to onuce(1 vote)
- There are 16 ounces in a pound. So you would divide the amount of ounces by 16. For example: 80 ounces is equal to 5 pounds.(5 votes)

- Can't he just multiply 16x6 and get the answer instead of doing all of this because 16x6=96 and we all now know that there are 16 ozs in one pound.(1 vote)
- You are right that you can just multiply 16 x 6, but Sal is doing all of that for a reason. As you get into higher maths and sciences you will be doing problems where you are converting
**multiple times**to different units in order to solve 1 problem. What Sal is doing is trying to get you used to having**the units that cancel in the numerator of 1 ratio and in the denominator of the second ratio**so that you know what cancels out. You may not need it right now, but you will see it later. Hope that helps with the why Homie!(4 votes)

- how many ounces are in 999 pounds?(1 vote)
- There are 15984 ounces in 999 pounds.(4 votes)

- how many ounces are in 7 pounds(2 votes)
- 7 pounds = 7 lb x 16 oz/lb = 112 oz(1 vote)

## Video transcript

How many ounces are
in 6 pounds? So we have 6 pounds
and we need to convert them to ounces. And if you don't know it
already, you'll know it now, that there are 16 ounces
per pound. So what we want to do is we
want to have pounds in the denominator. It's in the numerator
right now. So we want to divide by pounds
and multiply by ounces. Maybe I'll write it out. And I just told you
that there are 16 ounces for every 1 pound. So if we multiplied these two
expressions, this pounds will cancel with that pounds, and
we'll just be left with the unit of ounces, which is what we
want, and we just multiply 6 times 16. So it works out unit-wise, and
it makes sense as well. If we have 16 ounces per pound,
and we have 6 pounds, we just have to multiply
6 times 16. That'll be the total number of
ounces we have. So this is going to be equal to--
what's 6 times 16? So if you take 16 times
6, 6 times 6 is 36. Carry the 3. 6 times 1 is 6, plus 3 is 9. So 6 times 16 is 96. You have this divided by 1 here,
but that's not going to change anything. And then all we're
left with in the dimensions are the ounces. So 6 pounds are 96 ounces.