This converter turns cubic inches into US cups instantly, using the exact factor 1 cubic inch = 0.06926406926 US cups. 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 volume of a one-inch cube, traditional for US engine displacement. The US legal cup used in recipes: 240 mL, or 236.6 mL by the customary definition.
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
cubic inches- The amount you are converting, measured in cubic inches
0.06926406926- The exact number of US cups in one cubic inch
US cups- The converted result
How it works, step by step
- Enter the number of cubic inches you want to convert.
- The value is multiplied by 0.06926406926, the exact conversion factor.
- The result is displayed in US cups, rounded for readability.
- The unrounded value and the reverse conversion appear underneath so you can verify it.
Worked examples
Converting 5 cubic inches
Multiply 5 by 0.069264069. That gives 0.34632 US cups. A quick sanity check: one cubic inch is smaller than one US cup, so the number should get smaller — and it does.
Converting 72 cubic inches
72 × 0.069264069 = 4.987 US cups. Working backwards, 4.987 ÷ 0.069264069 returns 72 cubic inches, which confirms the factor is applied the right way round.
How to read your score
Frequently asked questions
How many US cups are in one cubic inch?
Exactly 0.06926406926. 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 cubic inches to US cups?
Us Cups = cubic inches × 0.06926406926. To reverse it, divide instead: cubic inches = US cups ÷ 0.06926406926, which is the same as multiplying by 14.4375.
Is the cubic inch bigger than the US cup?
No. One cubic inch is only 0.0692641 of a US cup, so the US cup is the larger unit.
Why does my answer differ slightly from other cubic-inches to cups 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 cubic inch?
The volume of a one-inch cube, traditional for US engine displacement.
What is a US cup?
The US legal cup used in recipes: 240 mL, or 236.6 mL by the customary definition.
Cubic Inches to US cups reference table
| Cubic Inches | Us Cups |
|---|---|
| 0.5 in³ | 0.034632 cup |
| 1 in³ | 0.069264 cup |
| 2 in³ | 0.138528 cup |
| 3 in³ | 0.207792 cup |
| 5 in³ | 0.34632 cup |
| 10 in³ | 0.692641 cup |
| 15 in³ | 1.039 cup |
| 20 in³ | 1.3853 cup |
| 25 in³ | 1.7316 cup |
| 50 in³ | 3.4632 cup |
| 75 in³ | 5.1948 cup |
| 100 in³ | 6.9264 cup |
| 250 in³ | 17.316 cup |
| 500 in³ | 34.632 cup |
| 1000 in³ | 69.2641 cup |
Exact factor: 1 cubic inch = 0.06926406926 US cups. Values rounded for display.