Convert between customary and metric units

Answer Key - Grade 7 Math Worksheet

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

1. 1.

   Kira's bucket holds 5 gallons of water. Remember: 1 gallon is about 3.8 liters. Using this fact, how many liters does it hold?

   19
2. 2.

   Esme pours 3 cups of cocoa into a thermos. Remember: 1 cup is about 240 milliliters. Using this fact, how many milliliters is that?

   720
3. 3.

   Pia's cat weighs 6.6 pounds. Remember: 1 kilogram is about 2.2 pounds. Using this fact, how many kilograms is the cat?

   3
4. 4.

   Ren's water tank holds 38 liters. Remember: 1 gallon is about 3.8 liters. Using this fact, how many gallons does it hold?

   10
5. 5.

   Jun's loaf of bread weighs 14 ounces. Remember: 1 ounce is about 28 grams. Using this fact, how many grams is that?

   • 0.5
   • 42
   • 392
6. 6.

   Milo bikes a 40 kilometer race. Remember: 1 mile is about 1.6 kilometers. Using this fact, how many miles is the race?

   • 64
   • 25
   • 38.4
7. 7.

   Luz's big water tank holds 76 liters. Remember: 1 gallon is about 3.8 liters. Using this fact, how many gallons does it hold?

   • 72.2
   • 288.8
   • 20

8. Read this first

   Use the table

   miles	kilometers
   5	8
   10	16
   15	24

   Each row shows the same amount in two units.

9. 8.

   Ari's hiking club logs trail lengths in miles and kilometers. The table shows the same distances both ways. Using this fact, how many kilometers is 25 miles?

   40
10. 9.

    Pia checks backpack weights in pounds and kilograms. The table shows the same weights both ways. Using this fact, how many kilograms is 50 pounds?

    22.5
11. 10.

    Tala weighs cookie dough in ounces and grams. The table shows the same weights both ways. Using this fact, how many grams is 10 ounces?

    280