Cubic Inches Calculator

Calculate cubic inches using length, width, and height measurements in inches, feet, yards, millimeters, centimeters, or meters.

Find area using our square inches calculator


Cubic Inches
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Are you calculating engine displacement? Try out displacement calculator to calculate cubic inches.

How to Calculate Cubic Inches

A cubic inch is a measure of volume for a cube that has a length, width, and height of one inch. To calculate a volume in cubic inches, start by taking measurements of the length, width, and height.

When measuring, find the length, width, and height in inches.

Then, multiply the dimensions of each side together to find the volume in cubic inches.

Cubic Inches Formula

Thus, you can use the following formula to find cubic inches:

in3 = length × width × height

For a rectangular space, it’s that simple! You can also use our volume calculator to find the volume of more complex shapes.

Calculate Cubic Inches with Other Measurements

Often your measurements will be taken in units other than inches, and that’s OK!

Use the formulas below to find cubic inches using centimeter and millimeter measurements. You can also use our volume converter to convert from cubic millimeters or cubic centimeters to cubic inches.

Use the following formula to find in3 when all measurements are in centimeters:

in3 = length × width × height ÷ 16.387

Use the following formula to find in3 when all measurements are in millimeters:

in3 = length × width × height ÷ 16,387

You might also be interested in our cubic meters calculator.