Cuboid Volume and Surface Area Calculator
Enter three positive dimensions in one unit to calculate V = lwh and S = 2(lw + lh + wh).
A QUICK WALKTHROUGH
How to use this tool
- Enter length, width, and height.
- Optionally add a unit label.
- Calculate and copy both results.
Cuboid formulas
For length l, width w, and height h, volume is lwh and total surface area is 2(lw + lh + wh). Every dimension must be finite and greater than zero.
Units and precision
Enter all dimensions in the same unit. Results use squared and cubed forms and are rounded to 12 significant digits for display.
GOOD TO KNOW
Common questions
Can the dimensions use different units?
Convert them to one common unit before calculating.
Is data uploaded?
No. The calculation stays in your browser.