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Cubic Feet Calculator

Calculate cubic feet, cubic yards, cubic inches, quantity totals, and optional cost from rectangular dimensions.

Enter the rectangular length.

Enter the rectangular width.

Enter the height, depth, or thickness.

Choose the unit used for all three dimensions.

Optional number of identical boxes, spaces, or items.

Optional price for a rough cost estimate.

Status: initial

Results

Awaiting calculation

Volume estimate

Introduction

The Cubic Feet Calculator finds the volume of a rectangular box, room, shipment, container, or material area from length, width, and height.

For a rectangular shape, cubic feet equals length in feet multiplied by width in feet multiplied by height in feet. If dimensions are entered in another unit, the calculator converts them to feet first.

Formula and method guide

Cubic feet

Cubic Feet = Length(ft) x Width(ft) x Height(ft)

This is the standard rectangular volume formula.

Cubic yards

Cubic Yards = Cubic Feet / 27

This is useful for bulk materials such as soil, mulch, gravel, or concrete.

Cubic inches

Cubic Inches = Cubic Feet x 1,728

This helps compare measurements entered or reported in inches.

Variables

Length

The longest side or front-to-back measurement.

Width

The side-to-side measurement.

Height or depth

The vertical, depth, or thickness measurement.

Unit

The measurement unit used for the entered dimensions.

Quantity

The number of identical boxes, spaces, or items.

FAQs

What does this Cubic Feet Calculator calculate?
It calculates rectangular volume in cubic feet, cubic yards, cubic inches, and optional estimated cost.
How do you calculate cubic feet?
Convert length, width, and height to feet, then multiply them together.
What is the cubic feet formula?
Cubic feet equals length in feet times width in feet times height in feet.
How many cubic feet are in a cubic yard?
There are 27 cubic feet in one cubic yard.
How many cubic inches are in a cubic foot?
There are 1,728 cubic inches in one cubic foot.
Can I enter inches?
Yes. Choose inches as the unit and enter all dimensions in inches.
Can I enter meters or centimeters?
Yes. The calculator converts meters or centimeters to feet before calculating volume.
Can I calculate multiple boxes?
Yes. Enter the quantity of identical boxes or items.
Does this calculate weight?
No. Weight requires density and material-specific assumptions.
Does this calculate cylinder volume?
No. This first version is for rectangular shapes only.
Can I use this for mulch or soil?
Yes for rectangular areas, but add an allowance for compaction and supplier rounding.
Can I use this for shipping?
Yes for rectangular packages, but carriers may use their own dimensional weight rules.
Should I measure inside or outside dimensions?
Use inside dimensions for capacity and outside dimensions for physical package size.
Why does the calculator show cubic yards?
Bulk materials are often sold by cubic yard, so cubic yard conversion is useful.
Is this an exact material order?
No. It is a geometric estimate and should be checked against real-world material and supplier rules.