1 Gallon (US) to Cubic Inch
Quick answer
1 Gallon (US) (gal) equals
231 in³
To convert 1 Gallon (US)s to Cubic Inches, multiply by 231. Therefore, 1 Gallon (US) (gal) equals 231 Cubic Inch (in³).
Formula: in³ = gal × 231. Calculation: 1 × 231 = 231 in³.
Convert Gallon (US) (gal) to Cubic Inch (in³) online with our free unit converter. In volume, 1 gal = 231 in³. Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.
Worked example: converting Gallon (US) to Cubic Inch
- Step 1 — start with the formula. in³ = gal × 231
- Step 2 — substitute your figure. 1 gal × 231
- Step 3 — read the result. 1 gal = 231 in³
- Step 4 — check it in reverse. gal = in³ × 0.0043290043 returns 1 gal, which matches the figure you started with.
Volume Converter
40 units available
1 gal = 231 in³
Formula:
in³ = gal × 231With your value: 1 gal = 231 in³
How big is that?
Everyday references on a logarithmic scale, all expressed in gallon (us) so you can sanity-check the result.
Other Gallon (US) to Cubic Inch conversions
Gallon (US) to Cubic Inch Conversion Table
| Gallon (US) (gal) | Cubic Inch (in³) |
|---|---|
| 0.5 | 115.5 |
| 1 | 231 |
| 2 | 462 |
| 5 | 1,155 |
| 10 | 2,310 |
| 15 | 3,465 |
| 20 | 4,620 |
| 25 | 5,775 |
| 50 | 11,550 |
| 100 | 23,100 |
| 250 | 57,750 |
| 500 | 115,500 |
| 1000 | 231,000 |
Cubic Inch to Gallon (US) Conversion Table
| Cubic Inch (in³) | Gallon (US) (gal) |
|---|---|
| 0.5 | 0.002165 |
| 1 | 0.004329 |
| 2 | 0.008658 |
| 5 | 0.021645 |
| 10 | 0.04329 |
| 15 | 0.064935 |
| 20 | 0.08658 |
| 25 | 0.108225 |
| 50 | 0.21645 |
| 100 | 0.4329 |
| 250 | 1.082251 |
| 500 | 2.164502 |
| 1000 | 4.329004 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Gallon (US) (gal)
Volume
The US liquid gallon is exactly 231 cubic inches = 3.785 411 784 L.
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
Cubic Inch (in³)
Volume
Derived from the cubic metre. The litre is exactly 10⁻³ m³; US and imperial capacity units are exact multiples fixed by statute.
Source: NIST Special Publication 811, Guide for the Use of the International System of Units
National Institute of Standards and Technology (US) · Reviewed 2026-07-01
How to Convert Gallon (US) to Cubic Inch
To convert from Gallon (US) (gal) to Cubic Inch (in³), multiply the value by 231.
Formula: in³ = gal × 231
Reverse: gal = in³ × 0.0043290043
Step-by-Step Example
- Start with your value in Gallon (US). For example: 5 gal
- Multiply by the conversion factor: 5 x 231
- The result is: 1,155 in³
Gallon (US) and Cubic Inch Relationship
Both Gallon (US) and Cubic Inch belong to the US Customary / Imperial system, making this an intra-system conversion within volume. Since 1 Gallon (US) equals approximately 231 Cubic Inches, the Gallon (US) represents a larger unit interval than the Cubic Inch. Understanding the relationship between Gallon (US) and Cubic Inch is essential for accurate calculations in physics, engineering, commerce, and daily applications.
About Gallon (US)
The US gallon equals approximately 3.785 liters and is the standard unit for fuel and large liquid volumes in the United States.
Fun Fact: The US gallon is about 20% smaller than the imperial (UK) gallon.
Common uses of Gallon (US): fuel (US), beverages, swimming pools.
About Cubic Inch
The Cubic Inch (symbol: in³) is a recognized unit in the US Customary / Imperial measurement framework, utilized within volume applications for precision and standardized data representation.
Common uses of Cubic Inch: volume calculations, engineering and science, education.
Frequently Asked Questions
- What is 1 Gallon (US) in Cubic Inch?
- 1 Gallon (US) equals 231 Cubic Inch.
- How many Cubic Inches are in 1 Gallon (US)?
- There are exactly 231 Cubic Inches in 1 Gallon (US). This means the conversion factor from Gallon (US) to Cubic Inch is 231.
- What is the formula to convert Gallon (US) to Cubic Inch?
- The formula to convert Gallon (US) to Cubic Inch is: in³ = gal × 231. For example, to convert 10 Gallon (US)s to Cubic Inches, you would multiply 10 by 231.
- What is a Gallon (US)?
- The US gallon equals approximately 3.785 liters and is the standard unit for fuel and large liquid volumes in the United States.
- What is a Cubic Inch?
- The Cubic Inch (symbol: in³) is a recognized unit in the US Customary / Imperial measurement framework, utilized within volume applications for precision and standardized data representation.
- What are the common uses of Gallon (US)?
- The Gallon (US) is commonly used in fuel (US), beverages, swimming pools.
Related Volume Conversions
Cite this page
UnitConvertLab. (2026). 1 Gallon (US) to Cubic Inch. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/1-gallon_us-to-cubic_inch