Convert Cubic Feet to Gallons

Category: Various Measurements/Units
- May 14, 2025
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Convert between cubic feet and gallons. In the US customary system, 1 cubic foot equals approximately 7.48052 US gallons.

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About Cubic Feet and Gallons

Cubic feet and gallons are both units of volume, but they're used in different contexts. Cubic feet is a unit of volume in the US customary and imperial systems, while gallons are used for liquid volume measurement.

Conversion Factors
  • US System: 1 cubic foot = 7.48052 US gallons
  • Imperial System: 1 cubic foot = 6.22884 Imperial gallons
  • US System (Reverse): 1 US gallon = 0.133681 cubic feet
  • Imperial System (Reverse): 1 Imperial gallon = 0.160544 cubic feet
Different Gallon Systems

There are two main types of gallons in use:

  • US Gallon: Used in the United States and some parts of Latin America, equal to 231 cubic inches or approximately 3.785 liters
  • Imperial Gallon: Used historically in the United Kingdom, Canada, and other Commonwealth countries, equal to 277.42 cubic inches or approximately 4.546 liters

The Imperial gallon is about 20% larger than the US gallon.

Common Applications
  • Construction: Concrete, soil, and other building materials are often measured in cubic feet
  • Water Usage: Water consumption is typically measured in gallons
  • Fuel Storage: Tank capacities may be expressed in either cubic feet or gallons
  • Shipping: Cargo space is often measured in cubic feet
  • Aquariums: Tank sizes can be expressed in both gallons and cubic feet
Additional Conversions
  • 1 cubic foot = 1,728 cubic inches = 28.3168 liters
  • 1 US gallon = 231 cubic inches = 3.78541 liters
  • 1 Imperial gallon = 277.42 cubic inches = 4.54609 liters
  • 1 cubic meter = 35.3147 cubic feet = 264.172 US gallons

Convert Cubic Feet to Gallons

This Conversion Calculator helps you quickly and accurately convert cubic feet to gallons or the Other way around. Whether you're working with water tanks, storage containers, or construction materials, this tool simplifies volume conversions between cubic feet and gallons using the US or Imperial systems.

US System: 1 cubic foot = 7.48052 US gallons
Imperial System: 1 cubic foot = 6.22884 Imperial gallons

Conversion Formula:
Gallons = Cubic Feet × Conversion Factor
Cubic Feet = Gallons ÷ Conversion Factor

Purpose of the Calculator

This unit conversion tool is designed to help you quickly convert measurements between cubic feet and gallons, which are commonly used volume units in construction, plumbing, agriculture, and liquid storage applications. It’s especially useful for:

  • Estimating how much water a tank can hold
  • Planning materials like concrete, soil, or gravel
  • Measuring space for fuel, chemicals, or beverages
  • Converting between different gallon systems (US and Imperial)

How to Use the Conversion Tool

This intuitive measurement converter requires just a few simple steps:

  1. Enter the numeric value you want to convert.
  2. Choose whether to convert from Cubic Feet to Gallons or Gallons to Cubic Feet.
  3. Select the gallon system: US Gallon or Imperial Gallon.
  4. Set your preferred number of decimal places for the result.
  5. (Optional) Check “Show explanation” for a detailed breakdown of the conversion formula and steps.
  6. Click Convert to see the result instantly.

Use the Reset button to start over at any time.

Why This Conversion Helper is Useful

This conversion tool is ideal for professionals and everyday users alike. Whether you’re working in logistics, home improvement, fluid storage, or gardening, accurate volume measurement is key. By using this tool, you can:

  • Ensure correct volume calculations for storage or transport
  • Avoid overflows or underfilling by using precise measurements
  • Quickly convert between volume units without memorizing formulas
  • Switch easily between US and Imperial systems depending on your region or industry

Frequently Asked Questions (FAQ)

What is a cubic foot?

A cubic foot is a unit of volume that measures a cube with sides of one foot in length. It is commonly used in construction and storage industries.

What’s the difference between US gallons and Imperial gallons?

US gallons are smaller than Imperial gallons. 1 US gallon equals approximately 3.785 liters, while 1 Imperial gallon equals approximately 4.546 liters. This volume conversion tool allows you to select either system based on your needs.

Can I convert gallons back into cubic feet?

Yes. Just switch the conversion direction to "Gallons to Cubic Feet" using the dropdown. The calculator will reverse the formula automatically.

Is this calculator accurate for scientific use?

This value conversion calculator is accurate for practical and general use. It uses industry-standard conversion constants and allows you to adjust decimal precision for more control.

Can I use this tool on my mobile device?

Yes. The calculator is fully responsive and works smoothly on desktops, tablets, and smartphones.

Related Conversions You Might Find Useful

Use this conversion calculator as your go-to unit conversion companion for quick, accurate, and clear results—anytime you need to convert cubic feet to gallons or vice versa.