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Cubic Inches to US Fluid Ounces (in³ to fl oz) Converter

1 cubic inch (in³) = 0.554113 US fluid ounces (fl oz). To convert cubic inches to US fluid ounces, multiply by 0.554113: 25 in³ × 0.554113 = 13.8528 fl oz.

1 in³ = 0.5541125534 fl oz
Convert the other way: US Fluid Ounces to Cubic Inches

Quick facts

How to convert cubic inches to US fluid ounces

  1. Take the value in cubic inches.
  2. Multiply it by 0.554113 (the number of US fluid ounces in one cubic inch).
  3. Round the result to the precision you need.
fl oz = in³ × 0.554113

Worked example: 25 in³ × 0.554113 = 13.8528 fl oz.

To convert US fluid ounces back to cubic inches, multiply by 1.80469, or divide by 0.554113.

Source: NIST Handbook 44, Appendix C, and NIST SP 811 (US customary volume units).

Cubic Inches to US Fluid Ounces conversion table

Cubic Inches to US Fluid Ounces conversion table
Cubic Inches [in³]US Fluid Ounces [fl oz]
0.01 in³0.0055411255 fl oz
0.1 in³0.0554112553 fl oz
1 in³0.5541125534 fl oz
2 in³1.1082251068 fl oz
3 in³1.6623376602 fl oz
5 in³2.770562767 fl oz
10 in³5.5411255341 fl oz
20 in³11.0822510682 fl oz
50 in³27.7056276705 fl oz
100 in³55.411255341 fl oz
1000 in³554.1125534099 fl oz

in³ to fl oz chart from 1 to 100

US Fluid Ounces to Cubic Inches conversion table

US Fluid Ounces to Cubic Inches conversion table
US Fluid Ounces [fl oz]Cubic Inches [in³]
0.01 fl oz0.018046875 in³
0.1 fl oz0.1804687502 in³
1 fl oz1.8046875023 in³
2 fl oz3.6093750046 in³
3 fl oz5.4140625069 in³
5 fl oz9.0234375114 in³
10 fl oz18.0468750229 in³
20 fl oz36.0937500458 in³
50 fl oz90.2343751144 in³
100 fl oz180.4687502288 in³
1000 fl oz1804.6875022884 in³

Cubic Inches vs US Fluid Ounces

Cubic InchUS Fluid Ounce
Symbolin³fl oz
Equals1 in³ = 0.554113 fl oz1 fl oz = 1.80469 in³

What is a cubic inch?

The volume of a cube with 1-inch sides. Used in the US for small mechanical parts and engine displacement.

What is a US fluid ounce?

A US customary unit equal to 1/16 of a US pint. Used in the US for beverage and bottle sizes.

Frequently asked questions

How many US fluid ounces are in a cubic inch?

There are 0.554113 US fluid ounces in 1 cubic inch (1 in³ = 0.5541125534 fl oz).

How many cubic inches are in a US fluid ounce?

There are 1.80469 cubic inches in 1 US fluid ounce (1 fl oz = 1.8046875023 in³).

How do I convert cubic inches to US fluid ounces?

Multiply the number of cubic inches by 0.554113. For example, 10 in³ × 0.554113 = 5.54113 fl oz. To convert back, multiply by 1.80469.

What is 10 in³ in US fluid ounces?

10 in³ = 5.54113 fl oz.

What is 100 in³ in US fluid ounces?

100 in³ = 55.4113 fl oz.

Is the conversion exact?

Yes. The factor comes from the official definitions of both units (NIST Handbook 44, Appendix C, and NIST SP 811 (US customary volume units)). Results are shown to up to 10 decimal places; round them to suit your purpose.

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Reviewed by

Dr. Muhammad Amjad Khadim PhD Mathematics

Dr. Muhammad Amjad Khadim holds a PhD in Mathematics. He writes and reviews the guides on pakmath.com and checks every formula, conversion factor and worked example against published standards and official guidance before it goes live. Spotted an error? Tell us and it will be corrected.

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First published 28 October 2026 · Last reviewed 5 November 2026