5.MD.4: Measure Volume by Counting Cubes
Also written as 5.MD.C.4 and CCSS.MATH.CONTENT.5.MD.C.4 · Cluster: Geometric measurement: understand concepts of volume.
The Official Wording
Measure volumes by counting unit cubes, using cubic cm, cubic in, cubic ft, and improvised units.
Common Core State Standards, Grade 5, Measurement & Data · Read it at the source · Checked October 14, 2026
What 5.MD.4 Means in Plain English
Fifth graders find volume by counting. They fill a shoebox with inch cubes, or count the centimeter cubes in a drawn stack, or pack a bin with identical blocks and report the volume in those blocks. The unit is named every time: 36 cubic inches, or 15 blocks.
Counting is slow on purpose. Once students see that every layer of a box holds the same number of cubes, they are ready for the formula (5.MD.5). An L-shaped stack is counted in parts, the additive idea 5.MD.5c makes official. Fractional edges arrive in 6th grade (6.G.2).
5.MD.4 I Can Statements
- I can count unit cubes to find the volume of a solid.
- I can report volume in cubic centimeters, cubic inches or cubic feet.
- I can measure volume with an improvised unit, like sugar cubes.
5.MD.4 Worked Example
An L-shaped stack of centimeter cubes: the kind of solid where counting carefully beats guessing.
A solid is built from centimeter cubes. The bottom layer is 5 cubes long and 2 cubes wide. On top of one end sits a second layer 2 cubes long and 2 cubes wide. What is the volume?
- Name the unit before counting: each cube is 1 cm on every edge, so each one is 1 cubic centimeter.1 cube = 1 cm³
- Count the bottom layer. It is a rectangle 5 cubes long and 2 wide, so count by rows of 5.Bottom layer: 5 + 5 = 10 cubes
- Count the top layer. It covers only one end: 2 cubes long and 2 wide.Top layer: 2 + 2 = 4 cubes
- Every cube is counted once and none is hidden, so add the layers.10 + 4 = 14 cubes
Check it: Count by columns instead: 6 columns are 1 cube tall (6 cubes) and 4 columns are 2 cubes tall (8 cubes). 6 + 8 = 14, the same total.
Common Mistakes with 5.MD.4
Counting faces instead of cubes
Counting every visible square on the drawing and calling that the volume
Try this: Hand out real cubes and rebuild the drawing. One cube shows up to three faces, so counting squares overcounts badly.
Forgetting the cubes underneath
“The top layer has 4 cubes, plus the ones I can see in front”
Try this: Count layer by layer from the bottom, saying each total out loud: 10 in the bottom layer, then 4 more on top.
Dropping the unit
“The volume is 14”
Try this: Require the unit in every answer. 14 cubic centimeters and 14 cubic inches are very different boxes, and 14 alone is a count.
Where 5.MD.4 Fits
Practice 5.MD.4
Quick Check
- A box is packed with 3 layers of 12 inch cubes. What is its volume?
- A stack has a bottom layer of 8 centimeter cubes and a top layer of 3. What is its volume?
- A bin is filled with 20 identical blocks with no gaps. What is its volume, and in what unit?