Convert Cubic Inches to Gallons - Accurate in³ ⇄ gal Calculator

Convert between cubic inches (in³) and US gallons with precision using standard volume measurements

Cubic Inches to Gallons Converter Tool
Enter a value to convert between cubic inches and US gallons with bidirectional conversion (1 gal = 231 in³)
Note: This converter uses standard conversion (1 US gallon = 231 cubic inches). Perfect for tank capacity calculations, fuel volume measurements, and liquid container sizing.

Volume conversion is an important concept in engineering, science, automotive, and daily applications. Two commonly used volume units are cubic inches (in³) and gallons (gal).

The cubic inch is part of the imperial/US customary system, widely used for engine sizes and small object volumes. The gallon is used for larger liquid capacities, such as fuel tanks, water containers, and beverage packaging. Knowing how to convert cubic inches to gallons and the reverse gallons to cubic inches helps in practical and professional calculations.

Our cubic inches ⇄ gallons converter provides fast, reliable, and precise results.

Why Use This Cubic Inches ⇄ Gallons Converter?

  • Accurate conversion: Uses the standard conversion factor.
  • Two-way results: Works for both cubic inches to gallons and gallons to cubic inches.
  • Instant calculation: Get results without manual math.
  • Clear output: Shows exact and rounded values.
  • Widely useful: Helpful in automotive, science, and fluid measurements.

How to Use the Converter

  1. Enter the value in cubic inches or gallons.
  2. Choose the conversion direction.
  3. View instant results.
  4. Apply in engineering, cooking, fuel calculations, or research.

What is a Cubic Inch (in³)?

cubic inch is a unit of volume equal to the space inside a cube with each side measuring one inch.

Key Facts About Cubic Inches

  • Exact value: 1 in³ = 0.004329 gallons (US).
  • Abbreviation: in³ or cu in.
  • Common uses: Engine displacement, small containers, 3D design.

What is a Gallon (gal)?

gallon is a larger unit of volume used in the US customary system and in some imperial contexts.

Key Facts About Gallons

  • Exact value: 1 US gallon = 231 cubic inches.
  • Abbreviation: gal.
  • Common uses: Fuel, beverages, water storage, cooking.

Cubic Inches to Gallons Conversion Formula

Formula:
Gallons = Cubic Inches ÷ 231

Cubic Inches to Gallons Conversion Examples

  • 231 in³ to gallons
    Formula: Gallons = in³ ÷ 231
    Substitution: 231 ÷ 231
    Result = 1 gal
     
  • 500 in³ to gallons
    Formula: Gallons = in³ ÷ 231
    Substitution: 500 ÷ 231
    Result = 2.16 gal
     
  • 1000 in³ to gallons
    Formula: Gallons = in³ ÷ 231
    Substitution: 1000 ÷ 231
    Result = 4.33 gal

Gallons to Cubic Inches Conversion Formula

Formula:
Cubic Inches = Gallons × 231

Gallons to Cubic Inches Conversion Examples

  • 1 gallon to cubic inches
    Formula: in³ = gal × 231
    Substitution: 1 × 231
    Result = 231 in³

     
  • 5 gallons to cubic inches
    Formula: in³ = gal × 231
    Substitution: 5 × 231
    Result = 1155 in³
     
  • 10 gallons to cubic inches
    Formula: in³ = gal × 231
    Substitution: 10 × 231
    Result = 2310 in³

Applications of Cubic Inches and Gallons Conversion

  • Automotive: Engine displacement often measured in cubic inches but sometimes converted to gallons for coolant or fuel capacity.
  • Cooking: Recipes involving large containers may require conversions.
  • Science Labs: Experiments dealing with volume need conversions between small and large units.
  • Industrial Use: Tank capacities and pipe volumes are calculated in gallons, sometimes converted from cubic inches.
  • Daily Life: Aquarium volumes, beverage bottles, and storage capacities can use either unit.

Quick Reference Table for Cubic Inches ⇄ Gallons

Cubic Inches (in³)

Gallons (gal)

Gallons (gal)

Cubic Inches (in³)

231 in³

1 gal

1 gal

231 in³

500 in³

2.16 gal

5 gal

1155 in³

1000 in³

4.33 gal

10 gal

2310 in³

2000 in³

8.66 gal

20 gal

4620 in³

Use our cubic inches ⇄ gallons converter at Digital Calculator for quick, accurate, and reliable results. Perfect for students, engineers, automotive experts, and anyone dealing with liquid volume measurements.

Our Popular Volume Calculators 

Ml Tsp Converter

Cubic Inch To CC Converter

Pint US To Quart US Converter

Pints To Liters Converter

Kiloliter To Liter Converter

 

Frequently Asked Questions

Published: 10/2/2025