Unit cube prism
Build a rectangular prism so students can see volume as cubic units.
Free maths tool
Volume tool
A free classroom volume model for building rectangular prisms from unit cubes and comparing base area, height and total cubic units.
Dimension controls
Change width, depth and height with simple stepper buttons.
Layers view
Switch from the prism to layers so students can connect base area and height.
Live measures
Read volume, dimensions and layer totals as the model changes.
What the tool does
The volume tool gives teachers and students an open unit-cube model for discussing rectangular prisms and cubic units.
- change the width, depth and height of a rectangular prism
- view the model as a prism or as stacked layers
- read the total volume in cubic units
- compare dimensions, base area, layers and total volume
- randomise or reset the prism for quick classroom examples
How teachers use it
Open it on a classroom display when students need to see how a three-dimensional volume is built from rows, columns and layers.
- build a prism and ask students to predict the number of cubic units
- change one dimension and discuss how the total volume changes
- switch to layers view to connect base area with height
- use random prisms as quick explain-and-calculate prompts
Why it is useful
Volume can become a formula before students understand the structure. A unit-cube model keeps the focus on what is being counted.
- connects rectangular prisms with arrays and layers
- supports the move from counting cubes to multiplying dimensions
- works as a model before independent measurement practice
Frequently Asked Questions
Is the volume tool free?
Yes. Teachers, students and families can open the volume tool in a browser for free.
What shapes does the volume tool model?
The tool models rectangular prisms built from unit cubes.
Can students change the dimensions?
Yes. Students can change the width, depth and height, then watch the volume, dimensions and layer labels update.
Is this different from the measurement practice app?
Yes. The volume tool is an open model for exploring cubic units, while the measurement practice app gives students practice questions.