Convert Cubic Inches to Cubic Feet
1 cubic inch (in³) equals 0.0005787037037 cubic feet (ft³).
1 in³ = 0.0005787037037 ft³
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk cubic inch to cubic foot converter to paste a column from Excel.
How to Convert Cubic Inch to Cubic Foot
- 1 in³ = 0.0005787037037 ft³
- 1 ft³ = 1728 in³
- Example: convert 15 in³ to ft³: 15 in³ = 15 × 0.0005787037037 ft³ = 0.008680555556 ft³
Formula
ft³ = in³ ÷ 1728
Derivation from SI units:
- 1 in³ = (0.0254 m)³ = 1.6387064 × 10⁻⁵ m³ = 16.387064 cm³
- 1 ft³ = (0.3048 m)³ = 0.028316846592 m³
- 1 in³ = 0.000016387064 m³ ÷ 0.028316846592 m³ per ft³ = 0.0005787037037037 ft³
Both units are defined exactly, so the factor is exact. Cubic Inch definition: cubic inch; Cubic Foot definition: cubic foot.
Worked examples
- A reading of 61.024 in³ converts to 0.03531481481 ft³.
61.024 in³ × 0.0005787037037 = 0.03531481481 ft³ - A value of 350 in³ is 0.2025462963 ft³.
350 in³ × 0.0005787037037 = 0.2025462963 ft³
Cubic Inch to Cubic Foot conversion table
| Cubic Inches (in³) | Cubic Feet (ft³) |
|---|---|
| 1 in³ | 0.0005787037037 ft³ |
| 5 in³ | 0.002893518519 ft³ |
| 10 in³ | 0.005787037037 ft³ |
| 25 in³ | 0.01446759259 ft³ |
| 50 in³ | 0.02893518519 ft³ |
| 61.024 in³ | 0.03531481481 ft³ |
| 100 in³ | 0.05787037037 ft³ |
| 231 in³ | 0.1336805556 ft³ |
| 250 in³ | 0.1446759259 ft³ |
| 302 in³ | 0.1747685185 ft³ |
| 350 in³ | 0.2025462963 ft³ |
| 427 in³ | 0.2471064815 ft³ |
| 454 in³ | 0.2627314815 ft³ |
| 500 in³ | 0.2893518519 ft³ |
| 1000 in³ | 0.5787037037 ft³ |
| 1728 in³ | 1 ft³ |
Where it's used
Cubic Inches are used for US engine displacement (e.g. 350 cubic inches ≈ 5.7 L), while cubic feet appear in natural gas billing (ccf, Mcf). Both measure volume (capacity), so the conversion is a fixed factor.
Cubic Inch to other volume units
| Conversion | 1 in³ equals |
|---|---|
| cubic inch to cubic meter | 0.000016387064 m³ |
| cubic inch to liter | 0.016387064 L |
| cubic inch to milliliter | 16.387064 mL |
| cubic inch to cubic centimeter | 16.387064 cm³ |
| cubic inch to cubic foot | 0.0005787037037 ft³ |
| cubic inch to US gallon | 0.004329004329 gal (US) |
| cubic inch to imperial gallon | 0.00360465015 gal (imp) |
Frequently asked questions
How many cubic feet are in 1 cubic inch?
1 in³ = 0.0005787037037 ft³.
How do I convert cubic inches to cubic feet?
Multiply the value in in³ by 0.0005787037037, or divide it by 1728. For example, 15 in³ × 0.0005787037037 = 0.008680555556 ft³.
Is the in³ to ft³ conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
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)".
- 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 foot (ft³)".
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). Convert Cubic Inches to Cubic Feet. Retrieved October 17, 2026, from https://scientificconverters.com/volume/cubic-inches-to-cubic-feet/
IEEE
Scientific Converters, "Convert Cubic Inches to Cubic Feet," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/volume/cubic-inches-to-cubic-feet/