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 × 7.48052**

Let’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 feet**

This 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 feet**

This 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

**Related Conversion Tools** :