This converter turns cubic inches into cubic centimeters instantly, using the exact factor 1 cubic inch = 16.387064 cubic centimeters. Type any number and the result updates as you go — nothing is sent to a server, so the arithmetic happens entirely in your browser.
The volume of a one-inch cube, traditional for US engine displacement. Identical to a millilitre; the classic unit for engine displacement.
Because the relationship is a simple proportion, one multiplication does the whole job. The table further down gives pre-computed values for the amounts people look up most often, and the result panel also reports the reverse conversion so you can check the figure both ways.
The formula
cubic inches- The amount you are converting, measured in cubic inches
16.387064- The exact number of cubic centimeters in one cubic inch
cubic centimeters- The converted result
How it works, step by step
- Enter the number of cubic inches you want to convert.
- The value is multiplied by 16.387064, the exact conversion factor.
- The result is displayed in cubic centimeters, rounded for readability.
- The unrounded value and the reverse conversion appear underneath so you can verify it.
Worked examples
Converting 5 cubic inches
Multiply 5 by 16.387064. That gives 81.9353 cubic centimeters. A quick sanity check: one cubic inch is larger than one cubic centimeter, so the number should get bigger — and it does.
Converting 72 cubic inches
72 × 16.387064 = 1,179.87 cubic centimeters. Working backwards, 1,179.87 ÷ 16.387064 returns 72 cubic inches, which confirms the factor is applied the right way round.
How to read your score
Frequently asked questions
How many cubic centimeters are in one cubic inch?
Exactly 16.387064. Every conversion on this page is that single number multiplied by your input, so the result carries no rounding error beyond what is shown.
What is the formula to convert cubic inches to cubic centimeters?
Cubic Centimeters = cubic inches × 16.387064. To reverse it, divide instead: cubic inches = cubic centimeters ÷ 16.387064, which is the same as multiplying by 0.06102374409.
Is the cubic inch bigger than the cubic centimeter?
Yes. One cubic inch equals 16.3871 cubic centimeters, so it is the larger unit.
Why does my answer differ slightly from other cubic-inches to cubic-centimeters converters?
Most differences come from rounding the factor too early. This tool keeps full double precision through the calculation and only rounds at the final display step, and it also shows the unrounded value so you can see exactly where any difference appears.
What is a cubic inch?
The volume of a one-inch cube, traditional for US engine displacement.
What is a cubic centimeter?
Identical to a millilitre; the classic unit for engine displacement.
Cubic Inches to cubic centimeters reference table
| Cubic Inches | Cubic Centimeters |
|---|---|
| 0.5 in³ | 8.1935 cm³ |
| 1 in³ | 16.3871 cm³ |
| 2 in³ | 32.7741 cm³ |
| 3 in³ | 49.1612 cm³ |
| 5 in³ | 81.9353 cm³ |
| 10 in³ | 163.8706 cm³ |
| 15 in³ | 245.806 cm³ |
| 20 in³ | 327.7413 cm³ |
| 25 in³ | 409.6766 cm³ |
| 50 in³ | 819.3532 cm³ |
| 75 in³ | 1,229.03 cm³ |
| 100 in³ | 1,638.71 cm³ |
| 250 in³ | 4,096.77 cm³ |
| 500 in³ | 8,193.53 cm³ |
| 1000 in³ | 16,387.06 cm³ |
Exact factor: 1 cubic inch = 16.387064 cubic centimeters. Values rounded for display.