Convert US fluid ounce to cubic inch on the exact usfl-to-in3 page. The calculator works both ways: type fl oz (US) or in3 and it updates the other field.
Describe the task to the AI assistant and continue from the result.
Open AI assistant →US fluid ounce to cubic inch Converter
Formula: in3 = fl oz (US) x 1.8046875. Reverse formula: fl oz (US) = in3 x 0.554112554113.
Conversion table
| US fluid ounce | cubic inch |
|---|---|
| 1 fl oz (US) | 1.8046875 in3 |
| 2 fl oz (US) | 3.609375 in3 |
| 5 fl oz (US) | 9.0234375 in3 |
| 10 fl oz (US) | 18.046875 in3 |
| 25 fl oz (US) | 45.1171875 in3 |
| 100 fl oz (US) | 180.46875 in3 |
Unit notes
The legacy usfl slug is treated as US fluid ounce. It is a volume unit, not an avoirdupois ounce of mass. A cubic inch is a volume cube one inch on each side.
Common mistakes
Do not mix US and Imperial units unless the page explicitly says so. If the query uses ounce, pint, quart, or gallon, check whether it means a liquid volume unit, a dry volume unit, or a mass unit. This page is locked to US fluid ounce -> cubic inch.
When this page is the right answer
Use it when the source value is already in US fluid ounce and the target answer must be in cubic inch. For a different pair, use full volume converter, US pint to liter, US quart to liter, US fluid ounce to ml, cubic meters to US gallons.
Quick answer
1 fl oz (US) = 1.8046875 in3. In reverse, 1 in3 = 0.554112554113 fl oz (US).
Search-style examples
| Input | Converted result | Half of that result |
|---|---|---|
| 1 fl oz (US) | 1.8046875 in3 | 0.90234375 in3 |
| 2 fl oz (US) | 3.609375 in3 | 1.8046875 in3 |
| 5 fl oz (US) | 9.0234375 in3 | 4.51171875 in3 |
| 10 fl oz (US) | 18.046875 in3 | 9.0234375 in3 |
| 25 fl oz (US) | 45.1171875 in3 | 22.55859375 in3 |
Standard used on this page
Source unit: legacy slug for US customary fluid ounce. Target unit: cubic inch. This matters because pints, quarts, gallons and fluid ounces can refer to different systems in search results.
Sanity check
If your result is off by about 20%, the usual cause is mixing US and Imperial liquid units. If it is off by a factor near 1000, check whether the input was liters, milliliters or cubic meters.