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

1 US fluid ounce (fl oz) = 1.80469 cubic inches (in³). To convert US fluid ounces to cubic inches, multiply by 1.80469: 12 fl oz × 1.80469 = 21.6563 in³.

1 fl oz = 1.8046875023 in³
Convert the other way: Cubic Inches to US Fluid Ounces

Quick facts

How to convert US fluid ounces to cubic inches

  1. Take the value in US fluid ounces.
  2. Multiply it by 1.80469 (the number of cubic inches in one US fluid ounce).
  3. Round the result to the precision you need.
in³ = fl oz × 1.80469

Worked example (a can of soda): 12 fl oz × 1.80469 = 21.6563 in³.

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

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

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

fl oz to in³ chart from 1 to 100

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

US Fluid Ounces vs Cubic Inches

US Fluid OunceCubic Inch
Symbolfl ozin³
Equals1 fl oz = 1.80469 in³1 in³ = 0.554113 fl oz

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.

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.

Frequently asked questions

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 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 do I convert US fluid ounces to cubic inches?

Multiply the number of US fluid ounces by 1.80469. For example, 10 fl oz × 1.80469 = 18.0469 in³. To convert back, multiply by 0.554113.

What is 10 fl oz in cubic inches?

10 fl oz = 18.0469 in³.

What is 100 fl oz in cubic inches?

100 fl oz = 180.469 in³.

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