Math
Cuboid Calculator
Find a cuboid's volume, surface area and space diagonal.
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A cuboid (rectangular box) is defined by its length, width and height.
The math behind it
Volume multiplies the three dimensions. Surface area sums the six faces: 2(lw + lh + wh). The space diagonal is √(l² + w² + h²).
Worked Example
4 × 3 × 5 → volume 60, surface 94, diagonal ≈ 7.07.
Frequently Asked Questions
Is a cube a cuboid?
Yes — a cube is a cuboid with all edges equal.
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