/convert/gallons-to-cubic-feet/ Convert US gallons to cubic feet instantly. Includes a reference table and formula. article US gallons to cubic feet Converter — 247QuickTools ,{ "@context": "https://schema.org", "@type": "SpeakableSpecification", "cssSelector": [".tool-intro", ".info-gain-section"] }
💧 Volume

US gallons to cubic feet Converter

Convert US gallons to cubic feet instantly. Includes a reference table and formula.

Quick answer: To convert US gallons to cubic feet, multiply by 0.133681. For example, 1 US gallons = 0.133681 cubic feet. Use the calculator below for any value.
US gallons to cubic feet
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Common conversions
US gallons cubic feet
Formula:

How to convert US gallons to cubic feet

1

Enter your value

Type the number of us gallons you want to convert into the left box. The result in cubic feet appears instantly in the right box. You can also type into the right box to convert in the other direction.

2

Use the swap button

Click the ⇄ Swap button to reverse the conversion — cubic feet to US gallons. Your current value carries across so you don't have to re-enter anything.

3

About US gallons and cubic feet

US gallons and cubic feet are both volume. Use this converter to switch between them instantly.

💡 Did you know?

1 US gallon = 0.134 ft³. 1 UK gallon = 0.161 ft³. Aquarium and pool volumes are often given in gallons in the US; liters elsewhere. A 10-gallon fish tank = 1.34 ft³ = 37.85 litres. A standard US water heater is 40-50 gallons.

📊 Common conversions at a glance
US gallons cubic feet
1 0.1337
5 0.6684
10 1.337
20 2.674
50 6.684
100 13.37
Reviewed for 2026. US gallons ↔ cubic feet conversion factor verified against published reference data. Built by a UK-based qualified primary teacher and FA Level 2 coach as part of 247QuickTools' free utility-tools project.