5 gallons is equal to approximately 0.6719 cubic feet.
To convert gallons to cubic feet, you multiply the number of gallons by the conversion factor 0.133681, since one gallon equals 0.133681 cubic feet. This conversion helps in understanding volume measurements in different units.
Conversion Tool
Result in cubic:
Conversion Formula
The formula to convert gallons to cubic feet is:
Cubic feet = Gallons × 0.133681
This works because one US gallon contains 231 cubic inches, and one cubic foot contains 1728 cubic inches. Dividing 231 by 1728 gives approximately 0.133681 cubic feet per gallon.
For example, converting 5 gallons:
- Multiply 5 gallons by 0.133681
- 5 × 0.133681 = 0.668405 cubic feet
- Rounded to four decimals, 0.6684 cubic feet
Conversion Example
- Convert 10 gallons to cubic feet:
- Start with 10 gallons
- Multiply 10 × 0.133681 = 1.33681 cubic feet
- Result is about 1.3368 cubic feet
- Convert 2.5 gallons:
- 2.5 × 0.133681 = 0.3342025 cubic feet
- Rounded to 0.3342 cubic feet
- Convert 15 gallons:
- 15 × 0.133681 = 2.005215 cubic feet
- Approximately 2.0052 cubic feet
- Convert 0 gallons:
- 0 × 0.133681 = 0 cubic feet
- No volume
- Convert 7.8 gallons:
- 7.8 × 0.133681 = 1.042468 cubic feet
- Rounded to 1.0425 cubic feet
Conversion Chart
| Gallons | Cubic (feet) |
|---|---|
| -20.0 | -2.6736 |
| -15.0 | -2.0052 |
| -10.0 | -1.3368 |
| -5.0 | -0.6684 |
| 0.0 | 0.0000 |
| 5.0 | 0.6684 |
| 10.0 | 1.3368 |
| 15.0 | 2.0052 |
| 20.0 | 2.6736 |
| 25.0 | 3.3420 |
| 30.0 | 4.0104 |
The chart list gallons in left column and their equivalent cubic feet on the right. To find any value, locate gallons then read across to see cubic feet. Negative values show volume below zero, which might be unusual but shown for completeness.
Related Conversion Questions
- How many cubic feet is 5 gallons of water?
- What’s the volume in cubic feet for 5 gallons of liquid?
- Convert 5 gallons to cubic feet for storage purposes.
- Is 5 gallons equivalent to 0.67 cubic feet?
- What formula convert gallons to cubic feet if I have 5 gallons?
- How does 5 gallons translate into cubic feet in construction?
- Can 5 gallons be expressed in cubic feet unit?
Conversion Definitions
Gallons: A gallon is a unit of volume measurement commonly used in the United States for liquids. One US gallon equals 128 fluid ounces or exactly 3.785411784 liters. It’s widely used for fuel, water, and other liquid measurements in everyday life and industry.
Cubic: The term cubic relates to volume measured in three-dimensional space, such as cubic feet or cubic meters. It represents the amount of space inside a container or object, calculated by multiplying length × width × height, expressed in units raised to the third power.
Conversion FAQs
Why do we multiply gallons by 0.133681 to get cubic feet?
This number comes from the relationship between gallons and cubic inches, then cubic inches to cubic feet. Since 1 gallon = 231 cubic inches and 1 cubic foot = 1728 cubic inches, dividing 231 by 1728 results in 0.133681. Multiplying gallons by this factor converts the volume correctly.
Can I use this conversion for gallons UK to cubic feet?
No, the UK gallon is bigger than the US gallon and equals about 1.20095 US gallons. If you use the US gallon conversion factor for UK gallons, the result will be inaccurate. For UK gallons, a different conversion factor must be used.
What happens if I enter a negative number in the conversion tool?
While physically negative volume doesn’t exist, the tool will calculate negative cubic feet because it just multiplies the input by the conversion factor. It could be used in mathematical contexts or error checking but not real-world volume.
Is the conversion factor exact or approximate?
The factor 0.133681 is exact based on the defined values of gallons and cubic feet in inches. However, when displayed with decimals, rounding causes small approximations. For most practical uses, the given factor is precise enough.
Can this conversion tool handle decimal gallons input?
Yes, the tool accepts decimal numbers and will convert them correctly by multiplying with 0.133681 and rounding the result to 4 decimal places. This allows precise volume conversions for fractional gallons.