Converting Between Metric and Customary Units

Open Ended

What did you do over the weekend?

Understanding U.S. Customary Units
& Metric System Conversion

Learning Intention:

• I am learning to reason about converting units within and between the US customary and Metric Systems.

Success Criteria:

• I can recognize that different units of measurement are needed when measuring different quantities.

• I can convert a measure from one system to another system.

Categorize

Options (11)

mile

kilometer

pound

kilogram

ounces

feet

inches

centimeters

decimeter

kilogra

gram

Match the units according to their correct units of measurement

US Customary Units

Metric System

The U.S. uses its own system for measuring length, weight, and volume.

• Length: inches, feet, yards, miles

• Weight: ounces, pounds, tons

• Volume: cups, pints, quarts, gallons

What are U.S. Customary Units?

Open Ended

When was the last time you used a foot, mile, or gallon? Can you think of examples around your home or school?

Most countries around the world use the Metric system for measuring.

• Length: millimeters, centimeters, meters, kilometers

• Weight: milligrams, grams, kilograms

• Volume: milliliters, liters

What are U.S. Metric Units?

Open Ended

Do you know how far a kilometer is?

Or how heavy a kilogram is compared to a pound?”

Open Ended

Why do we need to convert from unit to another?

Why Do We Need to Convert?

• Sometimes, we need to work with measurements in different systems (for example, traveling abroad or reading a recipe from another country).

• Converting helps us understand and compare measurements.

Length Conversion:

• 1 inch = 2.54 cm

• 1 foot = 30.48 cm

• 1 yard = 0.91 meters

• 1 mile = 1.61 kilometers

​

How to Convert U.S. Customary Units to Metric Units (and Vice Versa)

Weight Conversion:

• 1 ounce = 28.35 grams

• 1 pound = 0.45 kilograms

• 1 ton = 907.18 kilograms

​

How to Convert U.S. Customary Units to Metric Units (and Vice Versa)

Volume Conversion:

• 1 cup = 237 milliliters

• 1 pint = 473 milliliters

• 1 gallon = 3.78 liters

​

How to Convert U.S. Customary Units to Metric Units (and Vice Versa)

Conversion Example 1: Length

Example Problem:

• Convert 5 miles to kilometers.

• Step 1: Know the conversion factor: 1 mile = 1.61 km.

• Step 2: Multiply 5 miles by 1.61 km.

Math Response

Convert 3 feet to centimeters.

1 foot = 30.48 cm

Type answer here

Correct Answer: 91.44

Deg^°

Rad

Conversion Example 2: Weight

Example Problem:

• Convert 10 pounds to kilograms.

• Step 1: Use the conversion factor: 1 pound = 0.45 kilograms.

• Step 2: Multiply 10 pounds by 0.45 kg.

Math Response

Convert 2 ounces (oz) to grams (g).

1 oz = 28.35 g

Type answer here

Correct Answer: 56.7

Deg^°

Rad

Match

Match the U.S. Customary unit with its Metric equivalent.

• 1 gal

• 2 pounds

• 3 feet

3.78 liters

0.91 kg

91.44 cm

• 3.78 liters

• 0.91 kg

• 91.44 cm

Math Response

Practice Time!

Convert 4 miles to kilometers

1 mile = 1.61 kilometers

Type answer here

Correct Answer: 6.44

Deg^°

Rad

Math Response

Practice Time!

Convert 100 grams to ounces.

1 ounce = 28.35 grams

*round off your answer to nearest hundredth

Type answer here

Correct Answer: 3.53

Deg^°

Rad

Math Response

Practice Time!

Convert 8 cups to milliliters

1 cup = 237 milliliters

Type answer here

Correct Answer: 1896

Deg^°

Rad

Math Response

Real-Life Application: Cooking Conversion Challenge

Scenario:
You're baking a cake using a recipe from a country that uses the Metric system. The recipe calls for 250 grams of flour, but your scale is in ounces.

How many ounces of flour do you need?

1 ounce = 28.35 grams

*round off your answer to the nearest hundredth's place

Type answer here

Correct Answer: 8.82

Deg^°

Rad

Math Response

Exit Ticket

Interactive Exit Question:
Before you leave, answer this question:

If you walked 10 kilometers today, how many miles did you walk?

1 mile = 1.61 kilometers

Type answer here

Correct Answer: 6.21

Deg^°

Rad