Gallon (US) to Cubic Feet Converter
Volume · unit-converter
Convert Gallon (US) to Cubic Feet with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations use liter-based factors (US fluid measures, imperial UK units, SI cubic meters).
Calculator
From: Gallon (US) (gal)
To: Cubic Feet (ft3)
About Gallon (US)
The US liquid gallon is defined as 231 cubic inches (about 3.78541 liters). US recipes, fuel economy, and retail liquids typically use US gallons.
About Cubic Feet
The cubic feet is the volume of a cube one feet on a side (about 28.3168 liters). HVAC, construction, and US freight sometimes use cubic feet.
How to convert gallons (us) to cubic feet
1 gallon (us) is equal to 0.1336805554143 cubic feet:
1 gal = (3.78541178 L ÷ 28.316846592 L) ft3 = 0.1336805554143 ft3
Each gallon (us) is defined as 3.78541178 L and each cubic feet as 28.316846592 L, so one gal equals 3.78541178 ÷ 28.316846592 ft3 = 0.1336805554143 ft3.
Let V(gal) be the numeric value of the same volume measured in Gallon (US) (gal), and V(ft3) the value in Cubic Feet (ft3). Then:
V(ft3) = V(gal) × (3.78541178 / 28.316846592)
Equivalently, divide by how many gal fit into one ft3 (liters per ft3 divided by liters per gal):
V(ft3) = V(gal) ÷ 7.48051948842406
Or: cubic feet = gallon (us) ÷ 7.48051948842406
Examples
Example #1: Convert 20 gal to cubic feet
20 gal = 20 gal × (3.78541178/28.316846592) ft3 = 2.6736111083 ft3
20 gal = 20 gal ÷ 7.48051948842406 = 2.6736111083 ft3
Example #2: Convert 50 gal to cubic feet
50 gal = 50 gal × (3.78541178/28.316846592) ft3 = 6.6840277707 ft3
50 gal = 50 gal ÷ 7.48051948842406 = 6.6840277707 ft3
Summary
To convert Gallon (US) to Cubic Feet, multiply the value in gal by the ratio of liters per gal divided by liters per ft3. Equivalently: value_ft3 = value_gal × (3.78541178 / 28.316846592). Numerically, 1 gal equals 0.13368055541429688 ft3.
Relationship context
Both units are US customary fluid / volume in this tool’s grouping. Conversions use fixed liter equivalents, so factors are consistent for cooking, engineering, and cross-checking labels. The factor from Gallon (US) to Cubic Feet is 1.336806e-1 (1 gal = 0.13368055541429688 ft3).
Conversion tables
| Gallon (US) (gal) | Cubic Feet (ft3) |
|---|---|
| 0.1 | 0.0133680555 |
| 1 | 0.1336805554 |
| 2 | 0.2673611108 |
| 3 | 0.4010416662 |
| 4 | 0.5347222217 |
| 5 | 0.6684027771 |
| 6 | 0.8020833325 |
| 7 | 0.9357638879 |
| 8 | 1.0694444433 |
| 9 | 1.2031249987 |
| Gallon (US) (gal) | Cubic Feet (ft3) |
|---|---|
| 10 | 1.3368055541 |
| 20 | 2.6736111083 |
| 30 | 4.0104166624 |
| 40 | 5.3472222166 |
| 50 | 6.6840277707 |
| 60 | 8.0208333249 |
| 70 | 9.357638879 |
| 80 | 10.6944444331 |
| 90 | 12.0312499873 |
| 100 | 13.3680555414 |
Conversions outside the hub list
The grid on the category page lists hub units only. These pairs include at least one unit outside that hub set (same tools: formulas and tables on each page).
- us-gallon to uk-gallonGallon (US) to Gallon (UK)
- us-gallon to uk-quartGallon (US) to Quart (UK)
- us-gallon to uk-pintGallon (US) to Pint (UK)
- us-gallon to us-quartGallon (US) to Quart (US)
- us-gallon to us-pintGallon (US) to Pint (US)
- us-gallon to uk-cupGallon (US) to Cup (UK)
- us-gallon to us-cupGallon (US) to Cup (US)
- us-gallon to uk-fluid-ounceGallon (US) to Fluid Ounce (UK)
- us-gallon to uk-tablespoonGallon (US) to Tablespoon (UK)
- us-gallon to uk-teaspoonGallon (US) to Teaspoon (UK)
- uk-gallon to cubic-ftGallon (UK) to Cubic Feet
- uk-quart to cubic-ftQuart (UK) to Cubic Feet