Convert Cubic Foot to UK Gallon (ft³ → gal (UK))

Converting cubic feet to UK gallons is straightforward: multiply by the conversion factor. Follow these three steps to do it by hand or in your head.

1. 1
   Take your value in cubic feet

   Start with the number of cubic feet (ft³) you want to convert.
2. 2
   Multiply by 6.228836

   The conversion factor from ft³ to gal (UK) is 6.228836. Multiply your value by this number.
3. 3
   Read the result in UK gallons

   The result is your value in UK gallons (gal (UK)).

Multiply the value in cubic feet by 6.228836. For the reverse direction, multiply by 0.160544.

• ✓1 ft³ = 28.317 L = 0.0283 m³.
• ✓CFM to m³/h: multiply CFM by 1.699.
• ✓1 m³ ≈ 35.3 ft³.

• ✗Confusing ft³ with ft² in US real-estate contexts.
• ✗Using 28 L instead of 28.32 L in precision HVAC calculations.
• ✗Mixing CCF (100 cubic feet) with CFM (cubic feet per minute) on utility bills.

What is the Cubic Foot?

The cubic foot equals approximately 28.317 liters (or exactly 1,728 cubic inches) and is the American standard volume unit for HVAC capacity, natural-gas billing, refrigerator interior volume, and bulk material like concrete or mulch. American gas utilities measure delivered gas in 'CCF' (hundred cubic feet) or 'MCF' (thousand cubic feet), even when the customer thinks in terms of monthly bills. Refrigerators are advertised by their interior cubic-foot capacity (typical home unit: 18–25 ft³). Air-conditioning systems are rated in CFM (cubic feet per minute) airflow. Concrete is sometimes priced by the cubic yard (27 ft³), and mulch and topsoil are often sold by cubic foot bags. The cubic foot relates to the cubic yard (27 ft³ = 1 yd³), the cubic inch (1,728 in³ = 1 ft³), the cubic meter (1 ft³ ≈ 0.0283 m³), and the gallon (1 ft³ ≈ 7.481 US gal).

• US air-conditioning and ventilation flow (CFM)
• US natural gas consumption
• Refrigerator and freezer capacity in the US

What is the UK Gallon?

The UK imperial gallon equals exactly 4.54609 liters and is approximately 20% larger than the US gallon. Established by the British Weights and Measures Act of 1824 to standardize earlier ale and corn gallons, the imperial gallon was designed so that 10 pounds of pure water at 62°F occupied exactly 1 gallon. Although the United Kingdom has officially adopted the liter for fuel sales since 1995, the imperial gallon persists in everyday speech ('miles per gallon' for car fuel economy) and remains the standard unit in some Caribbean and Pacific Commonwealth countries. The imperial gallon relates to the US gallon (1 imp gal ≈ 1.201 US gal), the imperial quart (4 imp qt = 1 imp gal), the imperial pint (8 imp pt = 1 imp gal — the famous British pint of beer), and the liter (1 imp gal ≈ 4.546 L).

• UK fuel economy in miles per gallon (UK mpg)
• Older British industrial and brewing contexts
• Commonwealth countries that retain imperial measures