The cubic feet to gallons converter is an essential tool for water volume management to transform measurements between cubic feet (ft³), and gallons.
One cubic foot represents the volume of a cube measuring one foot on each side. When converting to gallons, we must consider whether we’re using U.S. liquid gallons or Imperial gallons, as they differ slightly in volume. For standard calculations in the United States, we use U.S. liquid gallons.
Cubic Feet to Gallons Conversion
| Cubic Feet Converted to | Gallons |
|---|---|
| 0.75 | 5.59 |
| 1 | 7.48 |
| 1.5 | 11.24 |
| 2 | 14.97 |
| 2.5 | 18.70 |
| 3 | 22.42 |
| 3.8 | 28.50 |
| 4 | 29.92 |
| 5 | 37.40 |
| 6 | 44.88 |
| 7 | 52.36 |
| 8 | 59.84 |
| 9 | 67.32 |
| 10 | 74.81 |
| 11 | 82.29 |
| 12 | 89.77 |
| 13 | 97.25 |
| 14 | 104.73 |
| 15 | 112.21 |
| 16 | 119.69 |
| 17 | 127.17 |
| 18 | 134.65 |
| 19 | 142.13 |
| 20 | 149.61 |
| 21 | 157.09 |
| 22 | 164.57 |
| 23 | 172.05 |
| 24 | 179.53 |
| 25 | 187.01 |
| 30 | 224.62 |
| 35 | 261.82 |
| 40 | 299.22 |
| 50 | 374.03 |
| 75 | 561.04 |
| 100 | 748.05 |
| 200 | 1496.10 |
| 1000 | 7480.52 |
| 2500 | 18662.63 |
Cubic Feet to Gallons Conversion Formula
The precise formula for converting cubic feet to gallons is:
Gallons = Cubic Feet × 7.48052Let’s break down why this works:
- One cubic foot contains exactly 1,728 cubic inches (12 inches × 12 inches × 12 inches).
- One U.S. liquid gallon equals 231 cubic inches.
- Therefore: 1,728 ÷ 231 = 7.48052 gallons per cubic foot.
To convert 5 cubic feet to gallons: 5 ft³ × 7.48052 = 37.4026 gallons
How to Convert Cubic Feet to Gallons?
Converting cubic feet to gallons involves three-step process:
- Identify your cubic feet measurement i.e 1 ft³
- Multiply by the conversion factor (7.48052).
- Round to the desired decimal places.
Converting 3.5 cubic feet to gallons:
3.5 × 7.48052 = 26.18182 gallons Rounded to two decimal places: 26.18 gallons- 1.5 Cubic Feet = 11.24 Gallons
- 3.8 Cubic Feet = 28.50 Gallons
- 4 Cubic Feet = 29.92 Gallons
- 100 Cubic Feet = 748.05 Gallons
- 200 Cubic Feet = 1496.10 Gallons
- 1000 Cubic Feet = 7480.52 Gallons
- 2500 Cubic Feet = 18662.63 Gallons
How Much Does a Cubic Foot of Water Weigh?
A cubic foot of water weighs approximately 62.4 pounds (28.3 kilograms) at room temperature (70°F/21°C).
This weight varies slightly with temperature changes, as water density changes with temperature.
At its maximum density (39.2°F/4°C), water weighs about 62.428 pounds per cubic foot.
How Many Gallons Can Fit in a Cubic Foot?
One cubic foot contains 7.48052 gallons of liquid. For example, if you have a cubic container measuring 1 foot on each side, it can hold 7.48052 gallons of water.
- Tank sizing
- Water flow calculations
- Construction projects
- Plumbing installations
How Many Cubic Feet is a 20 Gallon Tank?
To find the cubic feet in a 20-gallon tank, divide the gallons by 7.48052:
20 gallons ÷ 7.48052 = 2.67 cubic feetThis means a 20-gallon tank occupies approximately 2.67 cubic feet of space.
How Many Cubic Feet Can a 5 Gallon Bucket Hold?
Using the conversion principle:
5 gallons ÷ 7.48052 = 0.668 cubic feetThis calculation shows that a standard 5-gallon bucket occupies less than one cubic foot of space, making it a convenient size for many household and construction applications.
How Much is 100 Cubic Feet of Water?
Converting 100 cubic feet to gallons: 100 ft³ × 7.48052 = 748.052 gallons
This volume of water:
- Weighs approximately 6,240 pounds
- Could fill about 150 standard 5-gallon buckets
- Is commonly used as a billing unit by water utilities
References
- U.S. Geological Survey Water Science School: https://www.usgs.gov/special-topics/water-science-school
- National Institute of Standards and Technology (NIST): https://www.nist.gov/pml/weights-and-measures
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