Home › Geometry › Cuboid Calculator
Cuboid Calculator
Enter length, width and height — volume and surface update instantly.
Formula
V = l·w·h | S = 2(lw+lh+wh) | Diagonal = √(l²+w²+h²)
Example
80 × 50 × 30 mm box → V = 120 000 mm³ = 120 mL, S = 15 800 mm².
FAQ
How do I convert cuboid volume to liters?
mm³ ÷ 1 000 000 = liters; cm³ ÷ 1000 = liters.
What is the space diagonal?
The longest straight line inside the box, corner to corner: √(l²+w²+h²). Useful for checking whether an item fits through an opening.