Convert Gallons to Cubic Feet

Category: Various Measurements/Units
- May 01, 2025
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Convert between gallons and cubic feet easily. Choose between US liquid gallons (7.48052 gallons = 1 cubic foot), US dry gallons (6.42851 gallons = 1 cubic foot), or UK imperial gallons (6.22883 gallons = 1 cubic foot).

Enter Value

1 Cubic Foot = 7.48052 US Liquid Gallons

Display Options

About Gallons and Cubic Feet

Gallons and cubic feet are both units of volume, but they come from different measurement systems. Gallons are commonly used for liquid volume, while cubic feet are used for measuring the volume of three-dimensional spaces.

Conversion Ratios
Gallon Type Cubic Feet Equivalent Cubic Inches Equivalent
1 US Liquid Gallon 0.133681 ft³ 231 in³
1 US Dry Gallon 0.155620 ft³ 268.8025 in³
1 UK Imperial Gallon 0.160544 ft³ 277.42 in³
1 Cubic Foot - 1,728 in³
Practical Applications

The conversion between gallons and cubic feet is often needed in:

  • Water tank and container calculations
  • Swimming pool volume estimation
  • Shipping and freight volume calculations
  • Construction projects
  • HVAC and plumbing applications
  • Converting between water flow rates (gallons per minute vs. cubic feet per second)
Common Volume Reference Points
  • A standard bathtub holds about 40-60 gallons or approximately 5.3-8 cubic feet of water
  • A standard refrigerator has about 18-25 cubic feet of storage space
  • A typical household water heater has a capacity of 40-80 gallons (5.3-10.7 cubic feet)
  • A standard shower uses about 2 gallons (0.27 cubic feet) of water per minute
  • A compact car trunk has about 12-14 cubic feet of space
Units and Their Origins

The gallon originated as a measure for wine and other liquids in England, while the cubic foot is simply the volume of a cube with 1-foot sides. The US gallon is based on the Queen Anne wine gallon of 231 cubic inches established in 1707, while the imperial gallon was defined as the volume of 10 pounds of water at a specific temperature.

Formula Used

To Convert Gallons to Cubic Feet:
Cubic Feet = Gallons × Conversion Factor

To Convert Cubic Feet to Gallons:
Gallons = Cubic Feet × Conversion Factor

What Is the Gallons to Cubic Feet Calculator?

This Conversion Calculator helps you quickly convert between gallons and cubic feet using different gallon standards: US liquid gallons, US dry gallons, and UK imperial gallons. It serves as a practical measurement converter for everyday and professional tasks involving volume calculations.

Gallons are commonly used for measuring liquid capacity, while cubic feet are often used in construction, plumbing, and shipping to describe space or volume. This tool simplifies value conversion between these units without requiring manual calculations.

Why Use This Unit Conversion Tool?

This conversion helper is ideal when you need to:

  • Estimate the volume of a tank or container
  • Convert fuel or water storage between gallons and cubic feet
  • Calculate pool or hot tub capacities
  • Prepare construction or plumbing plans
  • Handle freight, shipping, or storage measurements

With support for US liquid, US dry, and UK imperial gallons, this conversion tool ensures accurate results specific to your measurement system.

How to Use the Calculator

Follow these simple steps to convert measurements:

  • Enter a numeric value in the input field.
  • Select whether the input is in gallons or cubic feet.
  • Choose the type of gallon: US liquid, US dry, or UK imperial.
  • Adjust display options, such as decimal precision or scientific notation, if needed.
  • Click the Convert button to view results.
  • The result will display in your selected output unit, with additional volume equivalents like liters and cubic inches for comparison.

You can also click Reset to clear all fields and start a new conversion.

Additional Conversion Insights

Along with the main result, the calculator shows Other equivalents like:

  • Cubic inches
  • Liters and cubic meters
  • Other gallon types
  • Quarts and pints (for US liquid gallons)
  • Approximate weight of water in pounds and kilograms

This makes it a valuable measurement converter when you need to compare different units or understand how much space or liquid a given value represents.

FAQs

Which gallon type should I choose?

Use US liquid gallons for most everyday liquid measurements in the United States. Choose US dry gallons for dry materials, and UK imperial gallons for measurements used in the UK and some Commonwealth countries.

Can I use this tool for fuel or water tanks?

Yes, this unit conversion tool is ideal for converting tank capacities, whether you're dealing with fuel, water, or other liquids stored in gallons or cubic feet.

What does scientific notation do?

Scientific notation helps display very large or small numbers more compactly (e.g., 0.000003 becomes 3.00e-6). You can enable this if you're dealing with extreme volume values.

What’s the difference between US liquid and dry gallons?

US liquid gallons are used for fluids and equal about 3.785 liters. US dry gallons are used for dry goods and equal roughly 4.404 liters. They are not interchangeable, so use the correct type for accurate conversions.

Is this calculator useful for professionals?

Absolutely. This conversion calculator helps professionals in engineering, construction, logistics, and HVAC easily convert measurements without manual errors.

Conclusion

Whether you're planning a project, managing resources, or just curious about volume conversion, this gallons to cubic feet calculator is a reliable and easy-to-use conversion helper. It streamlines quick unit conversions and offers clarity across different measurement systems with a single click.