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### Unit 14: Lesson 4

Converting US Customary units

# US Customary units of weight review (oz & lb)

Review the size of ounces and pounds and how to convert between the two.  Then, try some practice problems.

## Customary units of weight

Weight is a quantity of heaviness. For example, you are measuring the weight of your body when you step on to a scale.
In the customary system of measurement, the most common units of weight are the ounce (oz) and pound (lb).

### How much is an ounce?

A slice of bread has a weight of about 1 ounce:
A slice of bread.

### How much is a pound?

A soccer ball has a weight of about 1 pound:
A soccer ball.
Want to learn more about customary units of weight? Check out this video.

## Practice set 1: Estimating weight

Problem 1A
Identify the most reasonable unit to measure the weight of a refrigerator.

Want to try more problems like this? Check out this exercise.

## Converting pounds to ounces

1, start text, space, p, o, u, n, d, end text, equals, start color #28ae7b, 16, end color #28ae7b, start text, space, o, u, n, c, e, s, end text
To convert pounds to ounces we multiply the number of pounds by start color #1fab54, 16, end color #1fab54.
Example:
start color #ff00af, 30, end color #ff00af, start text, space, p, o, u, n, d, s, end text, equals, start color #ff00af, 30, end color #ff00af, times, start color #28ae7b, 16, end color #28ae7b, equals, start color #6495ed, 480, end color #6495ed, start text, space, o, u, n, c, e, s, end text

## Converting ounces to pounds

1, start text, space, o, u, n, c, e, end text, equals, start fraction, 1, divided by, start color #28ae7b, 16, end color #28ae7b, end fraction, start text, space, p, o, u, n, d, end text
To convert ounces to pounds we divide the number of ounces by start color #1fab54, 16, end color #1fab54.
Example:
start color #ff00af, 112, end color #ff00af, start text, space, o, u, n, c, e, s, end text, equals, start fraction, start color #ff00af, 112, end color #ff00af, divided by, start color #28ae7b, 16, end color #28ae7b, end fraction, equals, start color #ff00af, 112, end color #ff00af, divided by, start color #28ae7b, 16, end color #28ae7b, equals, start color #6495ed, 7, end color #6495ed, start text, space, p, o, u, n, d, s, end text
Want to learn more about converting pounds to ounces? Check out this video.

## Practice set 2: Converting units of weight

Problem 2A
Convert.
9 pounds equals
ounces

Want to try more problems like this? Check out these exercises:
Convert larger units to smaller units
Converting between units

## Want to join the conversation?

• how do I know if I need to multiply or dived?
• To convert "bigger" units to "smaller" ones, you multiply.
To convert "smaller" to bigger, you divide.
Pound is something big, and ounce is something small - smaller parts make one big thing - 16 ounces are in a pound.
To convert pounds to ounces, you multiply by 16.
To convert ounces to pounds, you divide by 16.
• how many ounces in a pound? I am braindead:/
• Why is it called U.S Customary Units of Weight?
• Because units change in every country in the world. For example, in Japan, people don't use inches!
• Seems like most of you are with me. I din't get this either. =(
• how does 8tons = 16000
• bc 8 times 2 is 16 and then you just add the 3 zeros.
• how to find the scientific notation
• Why is it called U.S Customary Units of Weight?
• its because the U.S is the only country that still uses the customary system