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What is a cubic foot?

Used in US HVAC, natural gas billing and appliance capacity

Definition

The cubic foot equals 28.317 litres exactly. It is used in US HVAC and ventilation (CFM — cubic feet per minute), US natural gas billing, and appliance capacity (refrigerators, freezers). One cubic foot is roughly the volume of a standard shoebox times six.

Common uses

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

🌍 Real-world scale

A typical US fridge is 20 cu ft (566 L). US HVAC flow rated in CFM. US residential gas billed per 100 cu ft (CCF).

Convert from cubic feet

14 conversions
Cubic Foot to Liter1 ft³ = 28.3168 LCubic Foot to Milliliter1 ft³ = 28,316.85 mlCubic Foot to Cubic Meter1 ft³ = 0.02832 m³Cubic Foot to US Gallon1 ft³ = 7.48052 gal (US)Cubic Foot to UK Gallon1 ft³ = 6.22884 gal (UK)Cubic Foot to Fluid Ounce1 ft³ = 957.506 fl ozCubic Foot to Cup1 ft³ = 117.987 cupCubic Foot to Pint1 ft³ = 59.8442 ptCubic Foot to Quart1 ft³ = 29.9221 qtCubic Foot to Tablespoon1 ft³ = 1,913.3 tbspCubic Foot to Teaspoon1 ft³ = 5,745.04 tspCubic Foot to Barrel1 ft³ = 0.1781 bblCubic Foot to Cubic Inch1 ft³ = 1,728 in³Cubic Foot to Cubic Yard1 ft³ = 0.03704 yd³

Convert to cubic feet

14 conversions
Liter to Cubic Foot1 L = 0.03531 ft³Milliliter to Cubic Foot1 ml = 3.5315e-5 ft³Cubic Meter to Cubic Foot1 m³ = 35.3147 ft³US Gallon to Cubic Foot1 gal (US) = 0.1337 ft³UK Gallon to Cubic Foot1 gal (UK) = 0.1605 ft³Fluid Ounce to Cubic Foot1 fl oz = 0.001044 ft³Cup to Cubic Foot1 cup = 0.008476 ft³Pint to Cubic Foot1 pt = 0.01671 ft³Quart to Cubic Foot1 qt = 0.03342 ft³Tablespoon to Cubic Foot1 tbsp = 0.0005227 ft³Teaspoon to Cubic Foot1 tsp = 0.0001741 ft³Barrel to Cubic Foot1 bbl = 5.61458 ft³Cubic Inch to Cubic Foot1 in³ = 0.0005787 ft³Cubic Yard to Cubic Foot1 yd³ = 27 ft³

Tips

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

Common mistakes

  • 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.

FAQ about the cubic foot

What is a cubic foot?
The cubic foot equals 28.317 litres exactly. It is used in US HVAC and ventilation (CFM — cubic feet per minute), US natural gas billing, and appliance capacity (refrigerators, freezers). One cubic foot is roughly the volume of a standard shoebox times six.
Where is the cubic foot used?
The cubic foot is commonly used for: US air-conditioning and ventilation flow (CFM); US natural gas consumption; Refrigerator and freezer capacity in the US.
What is an example of a cubic foot in real life?
A typical US fridge is 20 cu ft (566 L). US HVAC flow rated in CFM. US residential gas billed per 100 cu ft (CCF).
What category does the cubic foot belong to?
The cubic foot is a unit of volume, part of the 15-unit volume category on UnitConv.
How accurate are cubic foot conversions?
All conversion factors follow NIST and BIPM international standards to 8 significant figures — the highest practical accuracy.
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