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Cubic Feet Calculator

Get the cubic feet of a box, room, or shipping carton. Enter feet and inches for each side.

Your numbers

Cubic feet

4.5

Cubic yards
0.167
Cubic meters
0.127
Cubic inches
7,776

Results are estimates for planning. Check important figures with a qualified professional.

Quick answer

The Cubic Feet Calculator shows cubic feet of a box or space from length, width, and height in feet and inches. How it works: Cubic feet = length × width × height (all in feet); Inches ÷ 12 = feet. For example, with length (ft) of 2, length (in) of 0, and width (ft) of 1, the cubic feet is 4.5.

How to use the Cubic Feet Calculator

  1. Enter length (ft).
  2. Enter length (in).
  3. Enter width (ft).
  4. Enter width (in).
  5. Enter height (ft).
  6. Enter height (in).
  7. Read cubic feet and the breakdown. Use Share to send the exact numbers, or Print to save a PDF.

How it's calculated

  • Cubic feet = length × width × height (all in feet)
  • Inches ÷ 12 = feet

Worked example

With length (ft) of 2, length (in) of 0, width (ft) of 1, width (in) of 6, height (ft) of 1, and height (in) of 6:

Cubic feet: 4.5. Cubic yards: 0.167.

Questions people ask

How do I convert to cubic yards?

Divide cubic feet by 27.