Three perpendicular edges
Length a + Width b + Height c
V = abc; S = 2(ab+ac+bc)
Open calculator ↗GEOMETRY, ONE FIGURE AT A TIMECuboid.
Cuboid.
Understand every measure.
Length, width and height in harmony. Four free tools, clear formulas and a little discovery along the way.
Find your calculator ↗FIGURE 173D / REFERENCE DRAWING
CUBOIDNOT TO SCALE
THE CALCULATOR DESK
Start with what you know.
4 calculators available
Volume and two edges
Volume V + Length a + Width b
c = V/(ab)
Open calculator ↗Surface area and two edges
Total surface area S + Length a + Width b
c = (S/2−ab)/(a+b)
Open calculator ↗Space diagonal and two edges
Space diagonal d + Length a + Width b
c = √(d²−a²−b²)
Open calculator ↗MEET THE FIGURE
A cuboid, explained.
A cuboid, or rectangular box, is a solid with six rectangular faces and three perpendicular edge directions. Its length, width and height are independent positive measurements. A cube is the equal-edge special case.
Understand the properties ↗LOOK A LITTLE CLOSER
More than a formula.
Its twelve edges come in three groups of four equal lengths.
Internal capacity and external dimensions differ for a box with thick walls. Choose one consistent measurement convention.
Explore three geometry facts ↗These tools use ideal Euclidean geometry. Every input must use the same unit. Numerical results are rounded and do not replace measurement, specialist design or safety checks. See worked examples.