Gallons to Cubic Feet Conversion
Cubic Feet
Metric Liters
3D Volume Comparison Diagram
Live InteractiveGallons to Cubic Feet Conversion
Gallons to Cubic Feet Formula
To convert liquid gallons into three-dimensional volume in cubic feet, multiply the number of gallons by the volume of one gallon in cubic feet. Because US gallons and Imperial gallons have different physical definitions, use the formula that matches your standard:
Interactive Formula Evaluator
Live CalculatorGallons to Cubic Feet Conversion Factor
The conversion factor is derived directly from the legal definitions of each unit:
How to Convert Gallons to Cubic Feet
Verify whether your measurement is in US liquid gallons (standard across North America) or UK Imperial gallons (common in the UK, Ireland, Canada, and Australia).
For US gallons, multiply your volume by 0.133681 (or divide by 7.4805). For Imperial gallons, multiply by 0.160544 (or divide by 6.2288).
To convert cubic feet into cubic yards for ordering concrete or soil, divide the cubic feet by 27. To find water weight, multiply cubic feet by 62.4 lbs (28.3 kg).
How Many Cubic Feet Are in a Gallon?
One gallon is smaller than one cubic foot. Specifically, one US gallon occupies approximately 13.4% (about ⅛) of a cubic foot. Explore the key benchmarks below with our interactive visual scale comparison:
Interactive Container Volume Comparison
Visual Scale1 US Gallon to Cubic Feet
One US liquid gallon equals exactly 231 cubic inches. Dividing 231 by 1,728 (the number of cubic inches in a cubic foot) yields 0.133681 cubic feet. You need 7.48 US gallons of water to completely fill one cubic foot.
1 Imperial Gallon to Cubic Feet
One Imperial gallon equals 277.4194 cubic inches, converting to 0.160544 cubic feet. It takes 6.23 Imperial gallons to fill one cubic foot.
5 Gallons to Cubic Feet
A standard 5-gallon hardware store bucket holds 0.6684 cubic feet. To fill a 1-cubic-foot container, you need about one and a half 5-gallon buckets of liquid.
10 Gallons to Cubic Feet
Ten US gallons equals 1.3368 cubic feet. A standard 10-gallon rectangular aquarium typically measures 20″ × 10″ × 12″ (2,400 in³ exterior), holding just over 1⅓ cubic feet of water volume.
US Gallons vs Imperial Gallons
What Is a US Gallon?
The US liquid gallon is defined as exactly 231 cubic inches or 3.785411784 liters. It originated from the historic Queen Anne wine gallon of 1707 and is used across the United States. One US gallon contains 128 US fluid ounces and weighs approximately 8.34 pounds (3.78 kg) of pure water at 62°F.
What Is an Imperial Gallon?
The Imperial gallon is defined as exactly 4.54609 liters or 277.4194 cubic inches. Established by the British Weights and Measures Act of 1824, it originally represented the volume of 10 pounds of distilled water weighed in air. One Imperial gallon contains 160 Imperial fluid ounces.
Difference Between US and Imperial Gallons
The Imperial gallon is exactly 20.09% larger than the US liquid gallon. Use the interactive comparison below to see the volume and height difference side by side:
Side-by-Side Gallon Level Comparison
Dynamic VisualizerUS Gallon Equivalent
Imperial Gallon Equivalent
Gallons to Cubic Feet Conversion Table
Browse or search our instant reference tables below. Use the search box to filter any gallon amount:
US Gallons to Cubic Feet Conversion Table
| US Gallons | Cubic Feet (ft³) | Liters (L) | Cubic Meters (m³) | Water Weight (lbs) |
|---|---|---|---|---|
| 1 gal | 0.1337 ft³ | 3.785 L | 0.0038 m³ | 8.34 lbs |
| 2 gal | 0.2674 ft³ | 7.571 L | 0.0076 m³ | 16.69 lbs |
| 5 gal (Bucket) | 0.6684 ft³ | 18.927 L | 0.0189 m³ | 41.72 lbs |
| 10 gal | 1.3368 ft³ | 37.854 L | 0.0379 m³ | 83.45 lbs |
| 15 gal | 2.0052 ft³ | 56.781 L | 0.0568 m³ | 125.17 lbs |
| 20 gal | 2.6736 ft³ | 75.708 L | 0.0757 m³ | 166.90 lbs |
| 30 gal | 4.0104 ft³ | 113.562 L | 0.1136 m³ | 250.34 lbs |
| 50 gal | 6.6840 ft³ | 189.271 L | 0.1893 m³ | 417.24 lbs |
| 55 gal (Drum) | 7.3525 ft³ | 208.198 L | 0.2082 m³ | 458.97 lbs |
| 100 gal | 13.3681 ft³ | 378.541 L | 0.3785 m³ | 834.48 lbs |
| 200 gal | 26.7362 ft³ | 757.082 L | 0.7571 m³ | 1,668.96 lbs |
| 275 gal (IBC) | 36.7623 ft³ | 1,040.99 L | 1.0410 m³ | 2,294.82 lbs |
| 500 gal | 66.8404 ft³ | 1,892.71 L | 1.8927 m³ | 4,172.40 lbs |
| 1,000 gal | 133.681 ft³ | 3,785.41 L | 3.7854 m³ | 8,344.80 lbs |
| 2,500 gal | 334.202 ft³ | 9,463.53 L | 9.4635 m³ | 20,862.0 lbs |
| 5,000 gal (Pool) | 668.404 ft³ | 18,927.1 L | 18.9271 m³ | 41,724.0 lbs |
| 10,000 gal | 1,336.81 ft³ | 37,854.1 L | 37.8541 m³ | 83,448.0 lbs |
How to Convert Gallons to Cubic Feet by Hand
Converting US Gallons to Cubic Feet
When you need to make the conversion with pencil and paper or a standard pocket calculator, choose one of two equivalent methods:
- Method A (Multiplication): Multiply gallons by
0.133681. This is the fastest method. - Method B (Division): Divide gallons by
7.48052(since there are 7.48 gallons in 1 cubic foot).
Converting Imperial Gallons to Cubic Feet
For Imperial gallons, multiply by 0.160544 or divide by 6.22884.
Gallons to Cubic Feet Example
Interactive Step-by-Step Problem Solver
Live Practiceft³ = Gallons × 0.133681 (or Gallons ÷ 7.48052) ft³ = 250 × 0.133681 33.42 ft³ × 7.48052 = 250.0 gallons ✓ How to Convert Cubic Feet to Gallons
Cubic Feet to US Gallons Formula
Example: 10 ft³ × 7.48052 = 74.81 US Gallons
Cubic Feet to Imperial Gallons Formula
Example: 10 ft³ × 6.22884 = 62.29 Imperial Gallons
Cubic Feet to Gallons Example
Live Reverse Converter: ft³ → Gallons
Two-Way ToolUS Gallons
Imperial Gallons
What Is a Gallon?
Gallon as a Unit of Volume
A gallon is an imperial and US customary unit of volume used exclusively for fluid capacity. Today, three definitions exist in world trade:
- US Liquid Gallon: 3.78541 liters (231 cubic inches). Standard for fuels and everyday retail in North America.
- US Dry Gallon: 4.40488 liters (268.80 cubic inches). Used historically for agricultural produce like grains and berries.
- Imperial Gallon: 4.54609 liters (277.42 cubic inches). Standard across the United Kingdom, Canada, and commonwealth nations.
Gallon Abbreviations and Symbols
Common Uses of Gallons
Gasoline, diesel, and motor oil quantities and vehicle fuel efficiency (MPG).
Milk, drinking water, juice jugs, and bulk food processing.
Residential pool volumes, hot tubs, rainwater cisterns, and water filtration.
Interior/exterior paint cans and sealers with coverage rated in sq ft per gallon.
What Is a Cubic Foot?
Cubic Foot as a Unit of Volume
A cubic foot (ft³ or cu ft) is an imperial and US customary unit of volume representing a three-dimensional cube with sides measuring exactly 1 foot (12 inches or 0.3048 meters) each. One cubic foot contains 1,728 cubic inches and holds 7.48052 US gallons of liquid.
Interactive Anatomy of 1 Cubic Foot
3D DiagramCubic Foot Abbreviations and Symbols
Common Uses of Cubic Feet
Airflow requirements (CFM - cubic feet per minute) and room air exchange rates.
Shipping container space, moving trucks, and storage unit capacity.
Concrete slabs, topsoil, mulch bags, and pea gravel coverage.
Refrigerator, freezer, oven, and washing machine interior capacities.
Gallons to Cubic Feet in Real-World Applications
Water and Liquid Volume
Municipal water utilities typically bill water consumption in CCF (Centum Cubic Feet) or HCF (Hundred Cubic Feet). One CCF equals 100 cubic feet, which equals 748.05 US gallons. If your utility bill reports 12 CCF of water consumption for the month, your household used 12 × 748.05 = 8,976 gallons.
Tanks and Containers
Use our dedicated tank sizing calculator below to determine the capacity of common rectangular or cylindrical storage tanks:
Interactive Tank & Pool Capacity Estimator
Live 3D ToolTotal Volume
Liquid Capacity
Pools and Storage Capacity
Popular Conversions
Specialized Square Feet Calculators
Each tool is purpose-built with its own dedicated calculator, visual diagrams, and step-by-step guidance.
Triangle
Find the area of any triangle using base × height or Heron's formula with three side lengths.
Irregular Shape
Break any complex shape into rectangles and triangles. Add sections and sum them automatically.
Inches
Enter measurements in inches and get instant square feet results. Includes a quick-reference conversion table.
From Meters
Convert metric measurements to square feet. Perfect for international real estate and imported materials.
Linear Feet
Convert linear footage to square feet for lumber, carpet, fencing, decking, and rolled materials.
Sq Meters
Convert sq ft to sq m with live dual display. Essential for international real estate and architecture.
Sq Yards
Divide sq ft by 9 to get sq yd. Perfect for carpet ordering, sod purchases, and fabric estimates.
Acres
Convert property area from sq ft to acres. Ideal for land sales, farming, zoning, and lot size comparisons.
Cubic Feet
Add depth to any area to calculate volume. Essential for concrete, mulch, soil, gravel, and pool planning.
Gal → ft³
Convert US and Imperial gallons to cubic feet for pools, tanks, water storage, and liquid volume calculations.
House
Add rooms one by one and get your home's total square footage, with a live bar chart breakdown per room.
Room
Measure rectangular or L-shaped rooms for flooring, paint, and renovation budgeting with instant cost estimates.
Wall
Get net wall area for paint, wallpaper, or tile by subtracting doors and windows from the gross surface.
Tile
Enter room size and tile dimensions to calculate tile count, boxes to buy, and total material cost including waste.
Concrete
Get slab area, cubic yards of concrete, bags needed, and pour cost for any project.
Land
Measure any property lot or parcel in sq ft and acres. Supports rectangular, triangular, and irregular shapes.
BTU Calculator
Calculate heating and cooling BTU needs per square foot based on climate zone, ceiling height, and insulation.
Cost
Estimate total project cost from area and price per square foot. Compare scenarios with tax and markup.
Flooring
Find exact flooring material for hardwood, laminate, vinyl, or carpet with waste factor and box count.
Carpet Cost
Calculate carpet cost per square foot for material, installation, padding, and waste with live room diagrams.
Roof
Get true roof surface area using pitch multiplier. Includes roofing squares, shingle bundles, and cost.
Paint Area
Get paintable wall area with door and window deductions. Calculates gallons, coats, and total paint cost.
Estimation
Add multiple areas, apply buffer percentages, and get quick estimates for budgeting any project.
Frequently Asked Questions
1 US gallon equals 0.133681 cubic feet. 1 Imperial gallon equals 0.160544 cubic feet. The difference is because an Imperial gallon (4.546 liters) is about 20.1% larger than a US gallon (3.785 liters).
1 cubic foot equals 7.48052 US gallons or 6.22884 Imperial gallons. This conversion is essential for calculating pool volumes, tank capacities, and water usage.
5 US gallons equals 0.668404 cubic feet. 5 Imperial gallons equals 0.802719 cubic feet. A standard 5-gallon bucket holds about two-thirds of a cubic foot.
10 US gallons equals 1.33681 cubic feet. 10 Imperial gallons equals 1.60544 cubic feet. This is a common volume for aquariums and small storage tanks.
Multiply the number of US gallons by 0.133681, or multiply Imperial gallons by 0.160544. For example, 50 US gallons × 0.133681 = 6.684 cubic feet.
No. A US gallon equals 3.78541 liters (128 US fluid ounces), while an Imperial gallon equals 4.54609 liters (160 Imperial fluid ounces). The Imperial gallon is about 20.1% larger than the US gallon.
A gallon is a unit of liquid volume capacity, commonly used for fluids like water, milk, and fuel. A cubic foot is a unit of volume equal to a cube measuring 1 foot on each side (1,728 cubic inches). Cubic feet are used for larger volumes including rooms, containers, and storage spaces.
Yes. Multiply cubic feet by 7.48052 to get US gallons, or by 6.22884 to get Imperial gallons. For example, 10 cubic feet × 7.48052 = 74.8 US gallons.
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