Cubic Inches to Fluid Ounces Conversion

Enter the volume in cubic inches below to get the value converted to fluid ounces.

Results in Fluid Ounces:
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1 in³ = 0.554113 fl oz

How to Convert Cubic Inches to Fluid Ounces

To convert a cubic inch measurement to a fluid ounce measurement, multiply the volume by the conversion ratio.

Since one cubic inch is equal to 0.554113 fluid ounces, you can use this simple formula to convert:

fluid ounces = cubic inches × 0.554113

The volume in fluid ounces is equal to the cubic inches multiplied by 0.554113.

For example, here's how to convert 5 cubic inches to fluid ounces using the formula above.
5 in³ = (5 × 0.554113) = 2.770563 fl oz

Cubic inches and fluid ounces are both units used to measure volume. Keep reading to learn more about each unit of measure.

Cubic Inches

A cubic inch is a unit of volume equal to the space consumed by a cube with sides that are one inch in all directions. One cubic inch is equivalent to about 16.387 cubic centimeters or 0.554 fluid ounces.[1]

The cubic inch is a US customary and imperial unit of volume. A cubic inch is sometimes also referred to as a cubic in. Cubic inches can be abbreviated as in³, and are also sometimes abbreviated as cu inch, cu in, or CI. For example, 1 cubic inch can be written as 1 in³, 1 cu inch, 1 cu in, or 1 CI.

Fluid Ounces

The US fluid ounce is a unit of volume equal to 1/16 of a pint or 1/8 of a cup. The fluid ounce is sometimes referred to as an "ounce" but should not be confused with the unit of mass. One fluid ounce is equal to just under 29.6 milliliters, but in nutrition labeling, one fluid ounce is rounded to exactly 30 milliliters.[2]

The fluid ounce is a US customary unit of volume. Fluid ounces can be abbreviated as fl oz, and are also sometimes abbreviated as fl. oz. or oz. fl.. For example, 1 fluid ounce can be written as 1 fl oz, 1 fl. oz., or 1 oz. fl..

Cubic Inch to Fluid Ounce Conversion Table

Cubic inch measurements converted to fluid ounces
Cubic Inches Fluid Ounces
1 in³ 0.554113 fl oz
2 in³ 1.1082 fl oz
3 in³ 1.6623 fl oz
4 in³ 2.2165 fl oz
5 in³ 2.7706 fl oz
6 in³ 3.3247 fl oz
7 in³ 3.8788 fl oz
8 in³ 4.4329 fl oz
9 in³ 4.987 fl oz
10 in³ 5.5411 fl oz
11 in³ 6.0952 fl oz
12 in³ 6.6494 fl oz
13 in³ 7.2035 fl oz
14 in³ 7.7576 fl oz
15 in³ 8.3117 fl oz
16 in³ 8.8658 fl oz
17 in³ 9.4199 fl oz
18 in³ 9.974 fl oz
19 in³ 10.53 fl oz
20 in³ 11.08 fl oz
21 in³ 11.64 fl oz
22 in³ 12.19 fl oz
23 in³ 12.74 fl oz
24 in³ 13.3 fl oz
25 in³ 13.85 fl oz
26 in³ 14.41 fl oz
27 in³ 14.96 fl oz
28 in³ 15.52 fl oz
29 in³ 16.07 fl oz
30 in³ 16.62 fl oz
31 in³ 17.18 fl oz
32 in³ 17.73 fl oz
33 in³ 18.29 fl oz
34 in³ 18.84 fl oz
35 in³ 19.39 fl oz
36 in³ 19.95 fl oz
37 in³ 20.5 fl oz
38 in³ 21.06 fl oz
39 in³ 21.61 fl oz
40 in³ 22.16 fl oz


  1. National Institute of Standards and Technology, Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices, Handbook 44 - 2019 Edition,
  2. U.S. Food & Drug Administration, Guidance for Industry: Guidelines for Determining Metric Equivalents of Household Measures,

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