US Fluid Ounces to Cubic Inches
Convert us fluid ounces to cubic inches instantly. 1 fl oz = 1.8046875 in³. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert us fluid ounces to cubic inches
To convert us fluid ounces to cubic inches, multiply by 1.8046875. The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.
in³ = fl oz × 1.8046875
US Fluid Ounces to Cubic Inches conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| US Fluid Ounces | Cubic Inches |
|---|---|
| 1 fl oz | 1.804688 in³ |
| 2 fl oz | 3.609375 in³ |
| 3 fl oz | 5.414062 in³ |
| 5 fl oz | 9.023438 in³ |
| 10 fl oz | 18.046875 in³ |
| 20 fl oz | 36.09375 in³ |
| 25 fl oz | 45.117188 in³ |
| 50 fl oz | 90.234375 in³ |
| 100 fl oz | 180.46875 in³ |
| 500 fl oz | 902.34375 in³ |
| 1,000 fl oz | 1,804.69 in³ |
What is a us fluid ounce?
A sixteenth of a US pint, about 29.6 mL.
What is a cubic inch?
Exactly 16.387064 mL. The classic US engine-displacement unit.
The formula
in³ = fl oz × 1.8046875
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the US Fluid Ounces to Cubic Inches
- Type the number of us fluid ounces you want to convert.
- Read the result in cubic inches straight away — there is no button to press.
- Check the table below for the values that come up most often, or reverse the conversion with the linked cubic inches to us fluid ounces page.
US Fluid Ounces to Cubic Inches — frequently asked questions
How many cubic inches are in a us fluid ounce?
One us fluid ounce equals 1.8046875 in³. in³ = fl oz × 1.8046875
What is the formula to convert us fluid ounces to cubic inches?
The formula is in³ = fl oz × 1.8046875. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert cubic inches back to us fluid ounces?
Divide instead of multiplying: one cubic inch is 0.5541125541 fl oz. The reverse converter is linked in the related tools list.
Is this conversion exact?
Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.
Is this us fluid ounces to cubic inches free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
What people search for
This page answers each of these searches. They are the exact phrases visitors use to find the us fluid ounces to cubic inches.
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About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 15, 2026 · Calculation runs client-side · No data collected · Report an error