Cubic Inch (in³)
The cubic inch (in³) is the volume of a cube with 1 inch edges: exactly 16.387064 cm³.
Symbol: in³ (ASCII: in3)
Quantity: volume (capacity)
SI relation: 1 in³ = 0.000016387064 m³ (exact)
Derivation: 1 in³ = (0.0254 m)³ = 1.6387064 × 10⁻⁵ m³ = 16.387064 cm³
Exact: yes, by definition
Typical uses
- US engine displacement (e.g. 350 cubic inches ≈ 5.7 L)
- Hydraulic pump and motor displacement (in³/rev)
- Small container and part volumes
Convert cubic inches to other units
| Conversion | 1 in³ equals | Reverse |
|---|---|---|
| cubic inch to cubic meter | 0.000016387064 m³ | cubic meter to cubic inch |
| cubic inch to liter | 0.016387064 L | liter to cubic inch |
| cubic inch to milliliter | 16.387064 mL | milliliter to cubic inch |
| cubic inch to cubic foot | 0.0005787037037 ft³ | cubic foot to cubic inch |
| cubic inch to US gallon | 0.004329004329 gal (US) | US gallon to cubic inch |
| cubic inch to cubic centimeter | 16.387064 cm³ | cubic centimeter to cubic inch |
| cubic inch to imperial gallon | 0.00360465015 gal (imp) | imperial gallon to cubic inch |
Open the Volume Converter to convert any value between all units.
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "cubic inch (in³)".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Cubic Inch (in³). Retrieved October 17, 2026, from https://scientificconverters.com/units/cubic-inch/
IEEE
Scientific Converters, "Cubic Inch (in³)," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/units/cubic-inch/