What this conversion means in practice
You already have values in Gallon (US) (gallon) and need Cubic Foot (cubic feet) for the same material, drawing, or dataset. The factor below is the exact reciprocal of the forward direction; use it when sources quote the “other” unit first.
This page is intentionally focused on one volume pair so you can convert quickly without scanning a long all-purpose tool. These conversions are used in cooking, nutrition, labeling, fluid handling, lab work, and logistics where unit systems often get mixed.
The governing relationship here is 1 gallon = 0.133680555556 cubic feet. If results look suspicious, check whether the source value is US or metric, and confirm that abbreviations match the expected unit family. In volume, that matters because similar labels can represent different systems.
Use the calculator for exact values, the conversion table for quick references, and the unit notes below when you need context for reports, recipes, product specs, or technical instructions.
How to convert gallon (us) to cubic foot
Multiply the gallon (us) value by 0.133680555556 to get cubic foot.
Example: 15 gallon × 0.133680555556 = 2.005208333333 cubic feet
Gallon (US)
Definition: The US liquid gallon is defined as exactly 231 cubic inches, about 3.785 liters.
History and origin: The US gallon descends from older English wine-gallon standards used in colonial trade.
Current use: Common in the US for fuel, milk, paint, and other household liquid quantities.
Cubic Foot
Definition: A cubic foot (ft³) is the volume of a cube one foot on each side, about 28.3168 liters.
History and origin: It follows directly from the foot-based imperial/customary measurement systems.
Current use: Common in HVAC, construction, and shipping volume descriptions in the US.
Gallon (US) to Cubic Foot conversion table
| Gallon (US) (gallon) | Cubic Foot (cubic feet) |
|---|---|
| 0.1 gallon | 0.0133680556 cubic feet |
| 1 gallon | 0.1336805556 cubic feet |
| 2 gallon | 0.2673611111 cubic feet |
| 3 gallon | 0.4010416667 cubic feet |
| 5 gallon | 0.6684027778 cubic feet |
| 10 gallon | 1.3368055556 cubic feet |
| 20 gallon | 2.6736111111 cubic feet |
| 50 gallon | 6.6840277778 cubic feet |
| 100 gallon | 13.3680555556 cubic feet |
| 1,000 gallon | 133.6805555556 cubic feet |
Gallon (US) to Cubic Foot FAQ
Quick answers for Gallon (US)-to-Cubic Foot rounding (reverse workflow), precision, and common mistakes.
Is this factor exact?
Some conversion links are exact by unit definition, while display values may be rounded for readability. Use higher precision when documenting formulas, labels, or technical specs.
Why do volume mistakes happen so often?
Volume has many similarly named units across systems. US and UK gallons differ, fluid ounces differ by system, and kitchen shorthand can hide assumptions. Verify system and abbreviation first.
How many decimals should I keep?
Recipes often use low precision, while production and lab workflows may require more. Keep a precision standard across your workflow to avoid compounding rounding differences.