Cubic Inches to Cubic Centimeters Converter: Quick and Easy

Where 16.387064 comes from

An inch is defined as exactly 2.54 cm, so a cubic inch is 2.54³ cm³ = 16.387064 cm³. It's not a rounded approximation — it's the exact cube of the international inch definition, which is why the tool carries all six decimal places in the multiplier before rounding the displayed result to two.

Worked example

Enter 10 cubic inches: 10 × 16.387064 = 163.87064, which the tool displays as 163.87 cubic centimeters. For a smaller value like 1 cubic inch, you'd get 16.39 cm³.

Typical uses

This conversion comes up most often with engine displacement (small-engine and classic-car specs are often listed in cubic inches, while modern specs use cc or liters) and with shipping or container volumes where US and metric paperwork need to match.

Precision note

The result is rounded to two decimal places for display. If you need the unrounded figure — for example to chain into another calculation — multiply your cubic-inch value by 16.387064 directly rather than reading it off the tool.