What is the formula for the volume of a cube?

The volume of a cube is V = s³, where s is the length of any one side. Because all sides of a cube are equal, you only need one measurement.

What units does this calculator support?

You can enter the side length in millimeters (mm), centimeters (cm), meters (m), inches (in), or feet (ft). The result is automatically shown in the corresponding cubic unit.

How is a cube different from a rectangular prism?

A cube is a special case of a rectangular prism where all three dimensions (length, width, and height) are equal. If the sides differ, use a rectangular prism volume calculator instead.

Can I enter decimal values?

Yes. The calculator accepts any positive decimal number (e.g. 2.5 cm). Results are rounded to six significant figures to avoid floating-point clutter.

Is this calculator accurate for very large or very small values?

Yes, within JavaScript's double-precision floating-point range. For extremely large cubes (e.g. planetary scale) or extremely small ones (nanometer scale), the result switches to scientific notation automatically.

Volume of a Cube Calculator

Enter the side length of a cube and instantly get its volume with the formula shown.

Cube Dimensions

Side Length (s)

Formula

V = s³

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Result

Enter a side length to see the volume

Summary

The Volume of a Cube Calculator computes the volume of a perfect cube using the formula V = s³, where s is the length of one side. Enter the side length in any common unit — millimeters, centimeters, meters, inches, or feet — and the result is shown instantly alongside the expanded formula. The tool is entirely client-side and requires no server.

How it works

Enter the length of one side of the cube in the input field.
Select the unit of measurement (mm, cm, m, in, or ft).
The calculator applies the formula V = s × s × s in real time.
The result is displayed in the matching cubic unit (e.g. cm³).
Copy the result with one click for use in documents or reports.

Use cases

Calculate the capacity of a cubic storage box or container.
Determine the volume of a cubic aquarium or terrarium.
Solve geometry homework problems involving cubes.
Estimate material quantities for cubic construction elements.
Convert side measurements to volume for 3D printing projects.
Quick reference for teachers and students in math classes.

Frequently Asked Questions

Last updated: 2026-05-23 · Reviewed by Nham Vu