Cubic Feet to Gallons Conversion (ft³ to gal)

Cubic Feet to Gallons Converter

Enter the volume in cubic feet below to convert it to gallons.

Result in Gallons:

1 ft³ = 7.480519 gal

How to Convert Cubic Feet to Gallons

To convert a measurement in cubic feet to a measurement in gallons, multiply the volume by the following conversion ratio: 7.480519 gallons/cubic foot.

Since one cubic foot is equal to 7.480519 gallons, you can use this simple formula to convert:

gallons = cubic feet × 7.480519

The volume in gallons is equal to the volume in cubic feet multiplied by 7.480519.

For example, here's how to convert 5 cubic feet to gallons using the formula above.

gallons = (5 ft³ × 7.480519) = 37.402597 gal

How Many Gallons Are in a Cubic Foot?

There are 7.480519 gallons in a cubic foot, which is why we use this value in the formula above.

1 ft³ = 7.480519 gal

Cubic feet and gallons are both units used to measure volume. Keep reading to learn more about each unit of measure.

What Is a Cubic Foot?

The cubic foot is a unit of volume that is equal to the space consumed by a cube having sides one foot on each edge.

The cubic foot is a US customary and imperial unit of volume. A cubic foot is sometimes also referred to as a cubic ft. Cubic feet can be abbreviated as ft³, and are also sometimes abbreviated as cu foot, cu ft, or CF. For example, 1 cubic foot can be written as 1 ft³, 1 cu foot, 1 cu ft, or 1 CF.

You can calculate volume using a cubic footage calculator if you have the dimensions of a space or object.

Learn more about cubic feet.

What Is a Gallon?

The US liquid gallon is a unit of fluid volume equal to four quarts, eight pints, or sixteen cups.^[1] The US liquid gallon should not be confused with the US dry gallon or the imperial gallon, which are different units of measure.

The gallon is a US customary unit of volume. Gallons can be abbreviated as gal; for example, 1 gallon can be written as 1 gal.

Learn more about gallons.

Cubic Foot to Gallon Conversion Table

Table showing various cubic foot measurements converted to gallons.
Cubic Feet	Gallons
1 ft³	7.4805 gal
2 ft³	14.96 gal
3 ft³	22.44 gal
4 ft³	29.92 gal
5 ft³	37.4 gal
6 ft³	44.88 gal
7 ft³	52.36 gal
8 ft³	59.84 gal
9 ft³	67.32 gal
10 ft³	74.81 gal
11 ft³	82.29 gal
12 ft³	89.77 gal
13 ft³	97.25 gal
14 ft³	104.73 gal
15 ft³	112.21 gal
16 ft³	119.69 gal
17 ft³	127.17 gal
18 ft³	134.65 gal
19 ft³	142.13 gal
20 ft³	149.61 gal
21 ft³	157.09 gal
22 ft³	164.57 gal
23 ft³	172.05 gal
24 ft³	179.53 gal
25 ft³	187.01 gal
26 ft³	194.49 gal
27 ft³	201.97 gal
28 ft³	209.45 gal
29 ft³	216.94 gal
30 ft³	224.42 gal
31 ft³	231.9 gal
32 ft³	239.38 gal
33 ft³	246.86 gal
34 ft³	254.34 gal
35 ft³	261.82 gal
36 ft³	269.3 gal
37 ft³	276.78 gal
38 ft³	284.26 gal
39 ft³	291.74 gal
40 ft³	299.22 gal

Table showing various cubic foot measurements converted to gallons.

Cubic Feet

Gallons

1 ft³

7.4805 gal

2 ft³

14.96 gal

3 ft³

22.44 gal

4 ft³

29.92 gal

5 ft³

37.4 gal

6 ft³

44.88 gal

7 ft³

52.36 gal

8 ft³

59.84 gal

9 ft³

67.32 gal

10 ft³

74.81 gal

11 ft³

82.29 gal

12 ft³

89.77 gal

13 ft³

97.25 gal

14 ft³

104.73 gal

15 ft³

112.21 gal

16 ft³

119.69 gal

17 ft³

127.17 gal

18 ft³

134.65 gal

19 ft³

142.13 gal

20 ft³

149.61 gal

21 ft³

157.09 gal

22 ft³

164.57 gal

23 ft³

172.05 gal

24 ft³

179.53 gal

25 ft³

187.01 gal

26 ft³

194.49 gal

27 ft³

201.97 gal

28 ft³

209.45 gal

29 ft³

216.94 gal

30 ft³

224.42 gal

31 ft³

231.9 gal

32 ft³

239.38 gal

33 ft³

246.86 gal

34 ft³

254.34 gal

35 ft³

261.82 gal

36 ft³

269.3 gal

37 ft³

276.78 gal

38 ft³

284.26 gal

39 ft³

291.74 gal

40 ft³

299.22 gal

References

National Institute of Standards and Technology, Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices, Handbook 44 - 2019 Edition, https://nvlpubs.nist.gov/nistpubs/hb/2019/NIST.HB.44-2019.pdf