🧪 Volume Converter

Cups to Cubic Inches
( cup → in³ )

Instantly convert US cups to cubic inches. Enter any value below and get an accurate result with the full formula and reference table.

Converter Tool
cup
in³
Result
1 cup ≈ 14.438 in³
14.438
in³
The Formula
in³ = cup × 14.4375
1 US cup = 8 fluid ounces = 8 × 1.8046875 in³ = exactly 14.4375 in³.

How to Convert Cups to Cubic Inches

To convert US cups to cubic inches, multiply the number of cups by 14.4375. This exact factor comes from the relationship between cups, fluid ounces, and cubic inches in US customary units.

Step-by-Step Example

Let’s convert 2 cups to cubic inches:

1. Multiply by 14.4375: 2 × 14.4375 = 28.875
2. So 2 cups equals 28.875 in³.

For a smaller amount, 0.5 cup × 14.4375 = 7.21875 in³.

When You’d Use Each Unit

Cups are commonly used in the US for measuring ingredients like flour, sugar, milk, or water in recipes. Cubic inches are used in engineering, automotive (engine displacement), and for measuring small container volumes. Converting between them helps when dealing with recipes and technical specifications.

Conversion Table

Common cups values converted to cubic inches — typical values highlighted.

Cups (cup) Cubic Inches (in³) Approximate
Frequently Asked Questions
How do I convert cups to cubic inches quickly? +
Multiply by 14.44 for a rough estimate (e.g., 2 cups ≈ 28.88 in³). For exact conversion, use 14.4375. This tool provides the precise value.
How many cubic inches are in a cup? +
There are exactly 14.4375 cubic inches in one US cup.
What is 1 cup in in³? +
1 cup = 14.4375 in³.
What is 1 in³ in cups? +
1 in³ ≈ 0.069264 cup (since 1 / 14.4375 ≈ 0.069264).
Is this the same for UK cups? +
No, UK cups are about 284.131 mL, which is about 17.34 cubic inches. This converter uses US cups.
Can I convert cubic inches back to cups with this tool? +
Yes! Just type a value into the cubic inches field and the cups field updates automatically. Or use the ⇄ swap button to switch directions.
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