Convert between customary and metric units

Answer Key - Grade 7 Math Worksheet - Building Confidence

Circle the best answer, or write your answer on the line.

1. 1.

   With the arrow × 3 beside both columns. Ari sharpens a pencil down to 3 inches (it is getting very small). Remember: 1 inch = 2.54 centimeters. The table's next row is × 3. How many centimeters long is the pencil?

   7.62

2. Read this first

   Ratio table

   miles	kilometers
   1	1.6
   5	?

   With the arrow × 5 beside both columns.

3. 2.

   Ren hikes 5 miles on a trail (one squirrel judges the pace). Remember: 1 mile is about 1.6 kilometers. The table's next row is × 5. Using this fact, how many kilometers is the hike?

   8
4. 3.

   Kira's puppy weighs 5 kilograms (and wiggles on the scale). Remember: 1 kilogram is about 2.2 pounds. The table's next row is × 5. Using this fact, how many pounds is the puppy?

   11
5. 4.

   Esme's notebook is 8 inches wide (and covered in doodles). Remember: 1 inch = 2.54 centimeters. How many centimeters wide is the notebook?

   20.32
6. 5.

   Jun runs 4 miles at the track meet. Remember: 1 mile is about 1.6 kilometers. Using this fact, how many kilometers does Jun run?

   6.4
7. 6.

   Pia bakes one giant cookie that weighs 3 ounces. Remember: 1 ounce is about 28 grams. Using this fact, how many grams is the cookie?

   84
8. 7.

   Bo's watering can holds 2 gallons. Remember: 1 gallon is about 3.8 liters. Using this fact, how many liters does it hold?

   7.6
9. 8.

   Tala's kite string is 30 feet long (it tangles instantly). Remember: 1 foot is about 0.3 meter. Using this fact, how many meters long is the string?

   9

10. Use the table

    inches	centimeters
    1	2.54
    2	5.08
    3	7.62

11. 9.

    Noah cuts a strip of paper 6 inches long. The table shows inches and centimeters. How many centimeters long is the strip?

    15.24
12. 10.

    Ari cuts a block of cheese that weighs 7 ounces. The table shows ounces and grams. Using this fact, how many grams is that?

    196