Math

Cuboid Calculator

Find a cuboid's volume, surface area and space diagonal.

Parameters Live Compute
Calculated Output
Volume 60
Surface area 94
Space diagonal 7.071
Formula: V = lwh; SA = 2(lw + lh + wh); d = √(l²+w²+h²)
Step-by-Step Breakdown
1. Values used:
2. Length = 4
3. Width = 3
4. Height = 5
5.
6. Volume = Length x Width x Height = 4 x 3 x 5 = 60
7. Surface area = 94
8. Space diagonal = 7.071
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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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