Cuboid Calculator
What are the volume, surface area and diagonal of a rectangular box? Enter the values below to calculate the result.
Result for the values shown.
Calculations run in your browser.
What to enter
| Input | Meaning and units |
|---|---|
| Side a (length) | Enter side a in length; use the same basis as the other measurements. |
| Side b (length) | Enter side b in length; use the same basis as the other measurements. |
| Side c (length) | Enter side c in length; use the same basis as the other measurements. |
Understanding your result
Read volume (length^3), surface (length^2), diagonal (length) in the units and model stated on this page. The formula volume=a*b*c · surface=2*(a*b+a*c+b*c) · diagonal=hypot(a,b,c) defines the relationship; measurement accuracy and model applicability are separate from numerical precision.
Common mistakes
- Mixing input units or changing the physical meaning of a variable without changing the model.
Check your calculation
- Use the worked example as a known reference case, then change one input at a time and check the direction and units of the response.
Calculation checks, sources and review limits
What are the volume, surface area and diagonal of a rectangular box?
What are the volume, surface area and diagonal of a rectangular box? Enter the values below to calculate the result.
Common uses
- What are the volume, surface area and diagonal of a rectangular box
How it works
volume=a*b*c; surface=2*(a*b+a*c+b*c); diagonal=hypot(a,b,c)
Worked example
Enter Side a: 2 length; Side b: 3 length; Side c: 4 length. Results: volume: 24 length^3; surface: 52 length^2; diagonal: 5.385164807134504 length.