This converter turns US cups into cubic feet instantly, using the exact factor 1 US cup = 0.008355034722 cubic feet. Type any number and the result updates as you go — nothing is sent to a server, so the arithmetic happens entirely in your browser.
The US legal cup used in recipes: 240 mL, or 236.6 mL by the customary definition. The volume of a one-foot cube — used for shipping, refrigerators and natural gas.
Because the relationship is a simple proportion, one multiplication does the whole job. The table further down gives pre-computed values for the amounts people look up most often, and the result panel also reports the reverse conversion so you can check the figure both ways.
The formula
US cups- The amount you are converting, measured in US cups
0.008355034722- The exact number of cubic feet in one US cup
cubic feet- The converted result
How it works, step by step
- Enter the number of US cups you want to convert.
- The value is multiplied by 0.008355034722, the exact conversion factor.
- The result is displayed in cubic feet, rounded for readability.
- The unrounded value and the reverse conversion appear underneath so you can verify it.
Worked examples
Converting 5 US cups
Multiply 5 by 0.0083550347. That gives 0.041775 cubic feet. A quick sanity check: one US cup is smaller than one cubic foot, so the number should get smaller — and it does.
Converting 72 US cups
72 × 0.0083550347 = 0.601562 cubic feet. Working backwards, 0.601562 ÷ 0.0083550347 returns 72 US cups, which confirms the factor is applied the right way round.
How to read your score
Frequently asked questions
How many cubic feet are in one US cup?
Exactly 0.008355034722. Every conversion on this page is that single number multiplied by your input, so the result carries no rounding error beyond what is shown.
What is the formula to convert US cups to cubic feet?
Cubic Feet = US cups × 0.008355034722. To reverse it, divide instead: US cups = cubic feet ÷ 0.008355034722, which is the same as multiplying by 119.6883117.
Is the US cup bigger than the cubic foot?
No. One US cup is only 0.00835503 of a cubic foot, so the cubic foot is the larger unit.
Why does my answer differ slightly from other cups to cubic-feet converters?
Most differences come from rounding the factor too early. This tool keeps full double precision through the calculation and only rounds at the final display step, and it also shows the unrounded value so you can see exactly where any difference appears.
What is a US cup?
The US legal cup used in recipes: 240 mL, or 236.6 mL by the customary definition.
What is a cubic foot?
The volume of a one-foot cube — used for shipping, refrigerators and natural gas.
Us Cups to cubic feet reference table
| Us Cups | Cubic Feet |
|---|---|
| 0.5 cup | 0.004178 ft³ |
| 1 cup | 0.008355 ft³ |
| 2 cup | 0.01671 ft³ |
| 3 cup | 0.025065 ft³ |
| 5 cup | 0.041775 ft³ |
| 10 cup | 0.08355 ft³ |
| 15 cup | 0.125326 ft³ |
| 20 cup | 0.167101 ft³ |
| 25 cup | 0.208876 ft³ |
| 50 cup | 0.417752 ft³ |
| 75 cup | 0.626628 ft³ |
| 100 cup | 0.835503 ft³ |
| 250 cup | 2.0888 ft³ |
| 500 cup | 4.1775 ft³ |
| 1000 cup | 8.355 ft³ |
Exact factor: 1 US cup = 0.008355034722 cubic feet. Values rounded for display.