Metric Conversion Practice Questions

John_WilkinsMetric Conversion Practice Questions

John Wilkins, pictured left, in 1668, published an essay proposing a decimal system of measurement.

Below are practice test questions for the metric system similar to what you will find on a standardized test.  

1. Convert 10 kg. to grams.

a. 10,000 grams
b. 1,000 grams
c. 100 grams
d. 10.11 grams

2. 1 gallon = _________ liter(s).

a. 1 liter
b. 3.785 liters
c. 37.85 liters
d. 4.5 liters

3. Convert 2.5 liters to milliliters.

a. 1,050 ml.
b. 2,500 ml.
c. 2,050 ml.
d. 1,500 ml.

4. Convert 210 mg. to grams.

a. 0.21 mg.
b. 2.1 g.
c. 0.21 g.
d. 2.12 g.

5. Convert 10 pounds to kilograms.

a. 4.54 kg.
b. 11.25 kg.
c. 15 kg.
d. 10.25 kg.

6. Convert 0.539 grams to milligrams.

a. 539 g.
b. 539 mg.
c. 53.9 mg.
d. 0.53 g .

7. Convert 16 quarts to gallons.

a. 1 gallons
b. 8 gallons
c. 4 gallons
d. 4.5 gallons

8. Convert 45 kg. to pounds.

a. 10 pounds
b. 100 pounds
c. 1,000 pounds
d. 110 pounds

Answer Key 

1. A
1kg = 1,000 g and 10 kg = 10 x 1,000 = 10,000 g

2. B
1 US gallon = 3.78541178 liters

3. B
1 liter = 1,000 milliliters, 2.5 liters = 2.5 x 1,000 = 2,500 milliliters

4. C
1,000 mg = 1 g, 210 mg = 210/1000 = 0.21 g. Be careful of Choice A, (0.21 mg.)
The numbers are the same but the units are different.

5. A
1 pound = 0.45 kg, 10 pounds = 4.53592, or about 4.54 kg. When multiplying a
decimal by 10, move the decimal point one place to the left.

6. B
1 g = 1,000 mg. 0.539 g = 0.539 x 1000 = 539 mg.

7. C
4 quarts = 1 gallon, 16 quarts = 16/4 = 4 gallons. Conversion problems are easy to get confused. One way to think of them is which is larger – quarts or gallons? Gallons are larger, so if you are converting from quarts to gallons the number of gallons will be a smaller number. Keeping that in mind, you can do a ‘commonsense’ check on your answer.

8. B
0.45 kg = 1 pound, 1 kg. = 1/0.45 and 45 kg = 1/0.45 x 45 = 99.208, or 100 pounds.

 

 

2 thoughts on “Metric Conversion Practice Questions”

    1. Hard to say exactly what will be on the HOAE/PSB – and it changes all the time. These HOAE practice questions cover the same topics – but we can’t make any guarantees – and neither can anyone else.

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