Volume of Rectangular Prism Calculator
Length, Width, Height — and Nothing Else
Boxes, rooms, shipping containers, and most furniture are rectangular prisms, and their volume is the most familiar formula in geometry: multiply the three dimensions together. It's the cube's formula generalized to allow each edge its own length.
The Formula
Volume = Length × Width × Height
Worked Example
For a box with length 4, width 3, and height 5:
| Length | Width | Height | Volume |
|---|---|---|---|
| 4 | 3 | 5 | 60 |
Where This Matters
- Room and space planning — cubic capacity of a room drives HVAC sizing and ventilation calculations.
- Shipping and freight — cubic volume of cartons determines how many fit in a container or truck.
- Concrete and material orders — a rectangular footing or slab's volume sets how much concrete to order.
How to Use This Calculator
- Enter the Length.
- Enter the Width.
- Enter the Height.
- Select Calculate to get the volume.
Related Calculations
All three dimensions equal? Use the simpler Volume of Cube Calculator, or find the outer surface with the Surface Area Calculator.