Capacity
Capacity in Grade 4 Saxon Math Intermediate 4 defines and measures the total amount of liquid a container can hold. Students learn U.S. Customary units such as gallons, quarts, and cups, and metric units including liters and milliliters. A critical conversion is 1 gallon = 4 quarts, which students apply when solving problems such as: if a pot holds 2 gallons of soup and you pour it into 1-quart containers, how many containers do you need? The answer requires multiplying 2 gallons by 4 quarts per gallon to get 8 quarts. This skill builds measurement fluency needed for science and everyday tasks.
Key Concepts
New Concept The quantity of liquid a container can hold is the capacity of the container.
What’s next Next, you’ll explore the U.S. Customary and metric systems, learning how to convert between units like quarts and liters.
Common Questions
What is capacity in math?
Capacity is the total amount of liquid a container can hold. A small juice box has a small capacity; a large tank has a large capacity.
What are the U.S. Customary units for capacity?
Common units are gallons, quarts, pints, and cups. One gallon equals 4 quarts.
How do you convert gallons to quarts?
Multiply the number of gallons by 4. For example, 2 gallons x 4 = 8 quarts.
How do you solve a capacity conversion problem?
Identify the units involved, use the conversion factor to express both values in the same unit, then solve. Always convert to the same unit before calculating.
What are metric units for capacity?
The main metric units are liters and milliliters. One liter equals 1,000 milliliters, used in most countries outside the U.S.