Skip to content
user@convertitive:~$convertitiveLog in

US gallons to Cubic feet Converter

1 gal = 0.133681 ft³ (US gallon → cubic foot)

1 gal = 0.133681 ft³

1 US gallon equals 0.133681 cubic feet. To convert US gallons to cubic feet, multiply the US gallon value by 0.133681. For quick reference: 1 gal = 0.133681 ft³, 5 gal = 0.668403 ft³, 10 gal = 1.33681 ft³, 100 gal = 13.3681 ft³.

0.133681
FormulaCubic feet = US gallons × 0.133681
Quick

How to convert US gallons to cubic feet

  1. Take your value

    Start with your value in US gallons.

  2. Multiply by 0.133681

    Multiply the US gallon value by 0.133681. This is the exact conversion factor from US gallons to cubic feet.

  3. Read the result

    The product is your value in cubic feet. For example, 5 gal × 0.133681 = 0.668403 ft³.

Conversion formula

The exact factor from US gallons to cubic feet is 0.133681.

Cubic feet = US gallons × 0.133681

US gallons to Cubic feet conversion table

Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.

Conversion table from US gallons to cubic feet
US gallons (gal)Cubic feet (ft³)
0.1 gal0.013368 ft³
0.25 gal0.03342 ft³
0.5 gal0.06684 ft³
1 gal0.13368 ft³
1.5 gal0.20052 ft³
2 gal0.26736 ft³
2.5 gal0.3342 ft³
3 gal0.40104 ft³
4 gal0.53472 ft³
5 gal0.6684 ft³
6 gal0.80208 ft³
7 gal0.93576 ft³
8 gal1.0694 ft³
9 gal1.2031 ft³
10 gal1.3368 ft³
12 gal1.6042 ft³
15 gal2.0052 ft³
20 gal2.6736 ft³
25 gal3.342 ft³
30 gal4.0104 ft³
40 gal5.3472 ft³
50 gal6.684 ft³
60 gal8.0208 ft³
75 gal10.026 ft³
100 gal13.368 ft³
125 gal16.71 ft³
150 gal20.052 ft³
200 gal26.736 ft³
250 gal33.42 ft³
300 gal40.104 ft³
400 gal53.472 ft³
500 gal66.84 ft³
600 gal80.208 ft³
750 gal100.26 ft³
1000 gal133.68 ft³
1500 gal200.52 ft³
2000 gal267.36 ft³
2500 gal334.2 ft³
3000 gal401.04 ft³
4000 gal534.72 ft³
5000 gal668.4 ft³
7500 gal1002.6 ft³
10000 gal1336.8 ft³
15000 gal2005.2 ft³
20000 gal2673.6 ft³
25000 gal3342 ft³
30000 gal4010.4 ft³
40000 gal5347.2 ft³
50000 gal6684 ft³
100000 gal13368 ft³

Real-world reference

A standard US milk jug holds 1 gal. An average car's fuel tank is 12–16 gal. In cubic feet, that gives you: 1 gal = 0.133681 ft³, 10 gal = 1.33681 ft³, 100 gal = 13.3681 ft³.

Frequently asked questions

How many cubic feet are in 1 US gallon?
1 US gallon equals 0.133681 cubic feet.
How do I convert US gallons to cubic feet?
Multiply the US gallon value by 0.133681. So x gal × 0.133681 = the equivalent in ft³.
What is 5 US gallons in cubic feet?
5 US gallons equals 0.668403 cubic feet.
What is 10 US gallons in cubic feet?
10 US gallons equals 1.33681 cubic feet.
What is 100 US gallons in cubic feet?
100 US gallons equals 13.3681 cubic feet.
How do I convert back from cubic feet to US gallons?
Multiply the cubic foot value by 7.48052. For example, 1 ft³ = 7.48052 gal.
Is the US gallon bigger than the cubic foot?
No. 1 US gallon is smaller than 1 cubic foot. It takes 7.48052 US gallons to equal 1 cubic foot.
Are these conversion factors exact?
The underlying imperial/US unit definitions are exact; the displayed factor (0.133681) is rounded for readability, and the browser computes using IEEE 754 double-precision arithmetic.

About the US gallon and the cubic foot

The US gallon

The US liquid gallon equals exactly 3.785411784 liters, defined as 231 cubic inches. It is the standard fuel and milk unit in the United States. The US gallon is about 16.7% smaller than the UK (imperial) gallon (4.54609 L), so quoting fuel economy as 'mpg' without specifying the gallon can mislead by a wide margin.

The cubic foot

The cubic foot equals exactly 28.316846592 liters (0.3048 m cubed). It is the standard unit for US refrigerator and freezer capacity, natural-gas billing, and shipping-carton volume specifications.

Related converters

Cubic feet to US gallons
ft³ → gal
US gallons to Liters
gal → L
US gallons to US fluid ounces
gal → fl oz
US gallons to US cups
gal → cup
US gallons to US pints
gal → pt
US gallons to Tablespoons
gal → tbsp

Sources