Lesson Page

Metric and customary measurement tools.

height/length ruler
capacity cup/liter
weight scale
age calendar
temperature thermometer
time clock
mathematical operations calculator


  The ruler is a standard mathematical tool. Always look carefully at the scale to determine if you are measuring in inches or centimeters.
Customary Metric


You can use a ruler to measure an object to the nearest inch, nearest half inch, and nearest quarter inch. You can use a metric ruler to measure an object to the nearest centimeter.


Capacity is the amount a container can hold.

Customary Metric
8 fl oz = 1 cup
2 cups = 1 pint
2 pints = 1 quart
2 quarts = 1/2 gallon
4 quarts = 1 gallon

The milliliter (mL) is a metric unit used to measure the capacities of small containers.

The liter (L) is equal to 1,000 mL, so it is used to measure the capacities of larger containers.




You can measure a person's weight in pounds or kilograms to see how heavy they are.


16 ounces (0z) = 1 pound (lb)
2000 pounds (lbs) = 1 ton (T)
1000 grams = 1 kilogram (kg)



You can measure a person's age in months and years to see how old they are.



Temperature can be measured in degrees Fahrenheit or in degrees Celsius.

Time is measured in different units.


You can use a clock to help you name the number of minutes in an hour. An hour is made up of 60 minutes.

1 minute (min) = 60 seconds

1 hour (hr) = 60 minutes

1 day (d) = 24 hours

1 week (wk) = 7 days
1 month (mo) = about 4 weeks
1 year (yr) = 12 months
1 year = 365 days
1 leap year = 366 days
1 decade = 10 years
1 century = 100 years


Calculators can be used to check your work.

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