US cups to Cubic feet Converter
Convert US cups (cup) to Cubic feet (ft³) instantly, or use the conversion table below to look up common values.
US cups to Cubic feet conversion table
| US cups (cup) | Cubic feet (ft³) |
|---|---|
| 1 | 0.008355 |
| 2 | 0.01671 |
| 3 | 0.025065 |
| 4 | 0.03342 |
| 5 | 0.041775 |
| 10 | 0.08355 |
| 25 | 0.208876 |
| 50 | 0.417752 |
| 100 | 0.835503 |
How to convert US cups to Cubic feet
1 cup equals 0.008355 ft³. Use the converter above for any value, or read the table for common conversions.
ft³ = cup × 0.008355034722222222 · cup = ft³ × 119.6883116883117Multiply a us cups figure by 0.008355 to get cubic feet, or divide it by 119.688312 to go the other way.
Worked examples
- 1 cup= 0.008355 ft³
- 2 cup= 0.01671 ft³
- 5 cup= 0.041775 ft³
- 10 cup= 0.08355 ft³
- 20 cup= 0.167101 ft³
What these units are
US cups (cup). A US cup is 236.5882365 milliliters, or 8 US fluid ounces. It is the standard measure in American recipes; metric and Australian cups are 250 milliliters, so a recipe's cup depends on where it was written.
Cubic feet (ft³). A cubic foot is 28.316846592 liters, and the volume of a cube one foot on each side. It is used for gas meters, freight and the capacity of appliances and containers.
US and imperial units are kept separate because they are genuinely different sizes. Confirm which system a source means before trusting a converted figure.
Converting US cups to Cubic feet in practice
Working in us cups
A US cup is exactly 236.5882365 milliliters, one sixteenth of a US gallon and eight US fluid ounces. It is a recipe measure rather than a general liquid unit.
It appears in American and adapted recipe books, baking charts, measuring cup sets and some packaged food directions. Outside cooking it is rarely a legal or trade unit.
The US cup is exactly eight US fluid ounces, so cup to milliliter conversions are exact at 236.5882365. Results are rounded for display, which can shift the last digit on a return conversion.
The trap is the US legal cup of 240 milliliters used on nutrition labels, and the separate metric cup of 250 milliliters; neither matches this unit. Recipe cups are also level, not heaped.
The US cup belongs with US fluid ounces and pints, while milliliters and liters belong to the metric recipe. A metric jug marked in milliliters will not match a cup measure exactly, so a recipe converted cup by cup accumulates a small error each step.
Reading the result in cubic feet
A cubic foot is the volume of a cube with edges one foot long, exactly 28.316846592 liters or 0.028316846592 cubic meters. It is a unit of volume, not of area.
Shipping containers, natural gas, water supply, refrigeration and timber are measured in cubic feet in the United States and parts of the freight trade. Appliance capacities also use it.
The cubic foot is defined through the foot, so its liter value is exact at 28.316846592. Only the displayed result is rounded, and a value taken to cubic meters and back may return with the final digit changed.
The error is confusing a cubic foot with a square foot or with a foot; volume needs three dimensions. Another is using the cubic foot where a liquid measure such as the liter or gallon is expected.
Cubic feet and cubic meters divide the same volume on different scales, and liters appear on appliance and gas labels. One cubic meter is about 35.3 cubic feet, so a figure copied between them without conversion is wrong by more than thirtyfold.
Checking a us cups to cubic feet conversion
The metric volume units are a clean decimal chain around the liter, so liters to milliliters is a shift of three places and cubic meters to liters is a shift of three the other way. Those pairs a reader can do without a converter.
Every pair that names a US or imperial liquid unit has to go through the definition first, because three of these units differ from a metric unit by amounts too large to round away: a liter is not a quart, a gallon is 3.785411784 liters in the US system and 4.54609 in the imperial one, and a US fluid ounce is not an imperial fluid ounce.
When checking a volume conversion, convert into liters and out again, or measure the container. The mistake that survives every other check is reading a US measure as the imperial unit of the same name, which changes a recipe, a fuel figure or a tank size by about a fifth.
Tanzania reference points
Real quantities, converted into the units on this page.
The 20-litre bucket or canister used to carry water in Tanzania
20 L = 84.535057 cup = 0.706293 ft³
WaterAid puts the minimum daily water need per person at 20 litres, so one container is roughly one person's daily requirement.
Source: IPS News — water access in Tanzania, citing WaterAid · verified 2026-09-14
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