Math
Cylinder
Calculate cylinder volume and surface area, or solve a missing radius, diameter, or height from volume.
Calculators / Math / Rectangular prism
Rectangular prism calculator
Find the volume and closed surface area of a rectangular box.
On this page
Volume60cubic units
Surface area94square units
Calculator controls
How to calculate
Find the volume and closed surface area of a rectangular box.
Volume = w*h*l; Surface area = 2*(w*h+w*l+h*l)
Worked example
Width: 3; Height: 4; Length: 5.
Volume: 60 cubic units; Surface area: 94 square units.
Assumptions and limits
Yes. For an open container subtract the area of the missing face. Internal capacity requires internal dimensions, rather than outer dimensions.
Results are rounded for display; calculations use unrounded values. Read our calculation methodology.
Understanding the result
A rectangular prism has six rectangular faces meeting at right angles. Its volume is the product of its three perpendicular dimensions.
When this tool is useful
Find the volume and closed surface area of a rectangular box.
Understanding your inputs
| Input | What to enter |
|---|---|
| Width | Enter a number of at least 0 and no more than 1000000000. |
| Height | Enter a number of at least 0 and no more than 1000000000. |
| Length | Enter a number of at least 0 and no more than 1000000000. |
Frequently asked questions
Does the surface area include all six sides?
Yes. For an open container subtract the area of the missing face. Internal capacity requires internal dimensions, rather than outer dimensions.