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cubic-feet to gallons | Exact Decimal + Formula

1 Cubic Foot = 7.480519 US Gallon

One cubic foot equals about 7.48 US gallons (exactly 7.480519481 gal). Real-world use: refrigerator capacity, natural-gas billing, shipping volume, and mulch estimates in the US. This page expresses those values in US gallons, which is used for gasoline purchases, milk and water jugs, and bulk liquid quantities in the united states. Enter any value above — the result updates instantly, and a 1–1000 reference table follows below.

About Cubic Foot and US Gallon

Cubic Foot (ft³)

A cubic foot is the volume of a cube with 1-foot edges, about 28.317 liters.

Where it's used: Refrigerator capacity, natural-gas billing, shipping volume, and mulch estimates in the US.

US Gallon (gal)

The US gallon is exactly 3.785411784 liters and contains 128 US fluid ounces.

Where it's used: Gasoline purchases, milk and water jugs, and bulk liquid quantities in the United States.

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Volume Converter

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Formula

gal = ft³ × 7.480519481

To convert Cubic Foot to US Gallon, use the formula displayed above.

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Cubic Foot to US Gallon: Quick Reference Table

Cubic Foot US Gallon (Decimal) Fraction
0.001 ft³ 0.007481 gal -
0.01 ft³ 0.074805 gal 5/64 gal
0.1 ft³ 0.748052 gal 3/4 gal
0.5 ft³ 3.74026 gal 3 47/64 gal
1 ft³ 7.480519 gal 7 31/64 gal
2 ft³ 14.961039 gal 14 31/32 gal
5 ft³ 37.402597 gal 37 13/32 gal
10 ft³ 74.805195 gal 74 13/16 gal
25 ft³ 187.012987 gal 187 1/64 gal
50 ft³ 374.025974 gal 374 1/32 gal
100 ft³ 748.051948 gal 748 3/64 gal
250 ft³ 1870.12987 gal 1870 1/8 gal
500 ft³ 3740.25974 gal 3740 17/64 gal
1000 ft³ 7480.519481 gal 7480 33/64 gal

ft³ to gal Formula and Examples

Direct Formula gal = ft³ × 7.480519481
Inverse Formula ft³ = gal × 0.133681
Mental Math Shortcut

Multiply the value by roughly 7.5 to calculate the equivalent amount in your head.

Common Cubic Foot to US Gallon Calculations

  • 5 ft³ = 37.402597 gal
  • 10 ft³ = 74.805195 gal
  • 50 ft³ = 374.025974 gal
  • 100 ft³ = 748.051948 gal
  • 500 ft³ = 3740.25974 gal

Precision & Practical Use

For example, 10 ft³ = 74.805195 gal — roughly size of a backyard pool.

Measuring cups and jugs are accurate to about 2–5%. For cooking, rounding to the nearest tablespoon (15 mL) is fine; for chemistry and medicine, use a calibrated device and keep more digits.

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Related Specialist Volume Calculators & Niche Tools

Fluid volumes (liters, gallons, milliliters, cubic feet, and cubic yards) are the standard in science, brewing, and masonry. However, professional calculations must translate these raw capacities into chemical concentrations or physical compound mixes.

For example, laboratory technicians utilize molarity calculators to determine solute moles per liter of solvent volume, and solution concentration converters to switch between ppm (parts per million) and mg/L. Homebrewers and commercial vintners use Brix-to-Specific-Gravity calculators to assess sugar densities during fermentation. In civil construction, dry mix volumes of cement, sand, and gravel are converted into concrete bags needed for slab dimensions. These volume-specific calculators provide chemical, culinary, and construction professionals with precise mix ratios and volume-to-weight conversions.

How to Convert Cubic Foot to US Gallon

How many us gallons are in one cubic foot?
One Cubic Foot (ft³) equals 7.480519 US Gallon (gal). To convert cubic foots to us gallons, multiply the cubic foot value by 7.480519.
How do I convert Cubic Foot to US Gallon?
Multiply your cubic foot value by 7.480519 to get the result in US Gallon: gal = ft³ × 7.480519. For example, 5 ft³ = 37.402597 gal.
What is the formula for converting ft³ to gal?
The conversion formula is gal = ft³ × 7.480519. Use the calculator above for any value, and see the reference table below for common inputs from 0.001 to 1000.
Is there a quick mental estimate for ft³ to gal?
Multiply the value by roughly 7.5 to calculate the equivalent amount in your head.
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