complete.tools

Cubic Feet Calculator

Calculate the volume of a box in cubic feet, with cubic inches, cubic yards, cubic meters and liters.

What this tool does

Calculate the volume of a box in cubic feet, with cubic inches, cubic yards, cubic meters and liters. You fill in these fields: Length, Length unit, Width, Width unit, Height, and Height unit. It shows volume, cubic inches, cubic yards, cubic meters, and liters.

Inputs

  • Length: A number. Must be greater than 0.
  • Length unit: Choose one: Inch (in), Foot (ft), Yard (yd), Centimeter (cm), Millimeter (mm), Meter (m). Starts as Foot (ft).
  • Width: A number. Must be greater than 0.
  • Width unit: Choose one: Inch (in), Foot (ft), Yard (yd), Centimeter (cm), Millimeter (mm), Meter (m). Starts as Foot (ft).
  • Height: A number. Must be greater than 0.
  • Height unit: Choose one: Inch (in), Foot (ft), Yard (yd), Centimeter (cm), Millimeter (mm), Meter (m). Starts as Foot (ft).

How to use

  1. Enter the length.
  2. Choose an option for "Length unit".
  3. Enter the width.
  4. Choose an option for "Width unit".
  5. Enter the height.
  6. Choose an option for "Height unit".
  7. Read the result: volume, cubic inches, cubic yards, cubic meters, and liters. It appears once every required field has a valid value.

Worked examples

Example 1. Inputs:

  • Length: 12
  • Length unit: Inch (in)
  • Width: 10
  • Width unit: Inch (in)
  • Height: 8
  • Height unit: Inch (in)

Results:

  • Volume: 0.555556 ft³
  • Cubic inches: 960 in³
  • Cubic yards: 0.0205761 yd³
  • Cubic meters: 0.0157316 m³
  • Liters: 15.731581 L

How this is worked out: Box volume V = length x width x height. 12 x 10 x 8 = 960 cubic inches.

Example 2. Inputs:

  • Length: 1
  • Length unit: Foot (ft)
  • Width: 1
  • Width unit: Foot (ft)
  • Height: 1
  • Height unit: Foot (ft)

Results:

  • Volume: 1 ft³
  • Cubic inches: 1,728 in³
  • Cubic yards: 0.037037 yd³
  • Cubic meters: 0.0283168 m³
  • Liters: 28.316847 L

How this is worked out: 1 ft = 12 in, so each side is 12 in. V = 12 x 12 x 12 = 1728 cubic inches. This is one cubic foot.

Example 3. Inputs:

  • Length: 1
  • Length unit: Meter (m)
  • Width: 1
  • Width unit: Meter (m)
  • Height: 1
  • Height unit: Meter (m)

Results:

  • Volume: 35.314667 ft³
  • Cubic inches: 61,023.744095 in³
  • Cubic yards: 1.307951 yd³
  • Cubic meters: 1 m³
  • Liters: 1,000 L

How this is worked out: 1 in = 0.0254 m exactly, so 1 m = 1 / 0.0254 in. 1 cubic inch = 0.0254^3 m^3 = 0.000016387064 m^3 (NIST SP 811), so 1 m^3 = 1 / 0.000016387064 = 61023.744 cubic inches to three decimals.

Example 4. Inputs:

  • Length: 2.54
  • Length unit: Centimeter (cm)
  • Width: 2.54
  • Width unit: Centimeter (cm)
  • Height: 2.54
  • Height unit: Centimeter (cm)

Results:

  • Volume: 0.000578704 ft³
  • Cubic inches: 1 in³
  • Cubic yards: 0.0000214335 yd³
  • Cubic meters: 0.0000163871 m³
  • Liters: 0.0163871 L

How this is worked out: 1 in = 2.54 cm exactly, so each 2.54 cm side is 1 inch. V = 1 x 1 x 1 = 1 cubic inch.

Where this comes from

The volume of a box. V = l x w x h, for a rectangular box with length l, width w and height h. Source: The volume of a rectangular box (a cuboid) is the product of its three edge lengths. Euclidean geometry, as in any school geometry text.

Limitations

  • Works for rectangular boxes only. Round, angled or irregular shapes are not supported.
  • Uses the outside measurements you enter. It does not subtract wall thickness or empty space inside.
  • Every side must be greater than 0.

FAQs

Q: Do I need to convert my measurements first?
A: No. Pick the unit beside each side, and the sides are converted before the volume is worked out.
Q: Can I use a different unit for each side?
A: Yes. Each side has its own unit, so a box measured in feet and inches can be entered as it was measured.
Q: Why is the volume shown in other units too?
A: They are the same volume written in other units, so you do not have to convert it yourself.
Q: Does it work for round or irregular shapes?
A: No. It works for rectangular boxes only, where the volume is length times width times height.

Explore Similar Tools

Explore more tools like this one: