How do you convert fluid ounces to cubic inches?

To convert fluid ounces (fl oz) to cubic inches (in³), multiply the volume in fluid ounces by 1.80469 (cubic inches = fluid ounces × 1.80469).

What is 5 fluid ounces in cubic inches?

5 fluid ounces (5 fl oz) is equal to 9.02344 cubic inches (9.02344 in³).

Which is larger, 1 fluid ounce (us) (fl oz) or 1 cubic inch (in³)?

One fluid ounce (us) (fl oz) is larger than one cubic inch (in³). Specifically, 1 fl oz contains 1.80469 in³, whereas 1 in³ is 0.55411 fl oz.

How do I convert back from cubic inches (in³) to fluid ounces (us) (fl oz)?

To reverse the calculation from in³ to fl oz, multiply your cubic inch value by the inverse factor 0.55411 (or divide by 1.80469). You can also click the Swap button in the tool above to flip directions in one click.

How many decimal places should I round fl oz to in³ results to?

For everyday comparisons and quick estimates, rounding to 2 decimal places is usually sufficient (for example, 5 fl oz ≈ 9.02 in³). For engineering, laboratory, or machining specifications, select 4 or 6 decimals—or Scientific (10ⁿ) mode—in the calculator toolbar above.

Fluid Ounces to Cubic Inches Converter

Enter the volume in fluid ounces below to convert it to cubic inches.

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

Convert Fluid Ounces (US) to Cubic Inches

Enter a value in fluid ounces (us) (fl oz) to convert to cubic inches (in³).

Value (fl oz)

From

Result

•

9.0234375cubic inches

5 fl oz = 9.0234375 in³

Result updates automatically

Get Widget

Equivalent Measurements Across UnitsFor 5 fl oz

Milliliters147.86765 mL

Liters0.14787 L

Suggested Conversions

Reference:NIST OWM (SI Units — Volume)

[1–3] ↓

Fluid Ounce to Cubic Inch Conversion Table

Table showing various fluid ounce measurements converted to cubic inches. Click any preset value or arrow to load it into the converter.

Fluid Ounces (US) (fl oz)	Cubic Inches (in³)
1 fl oz	1.8046875 in³
2 fl oz	3.609375 in³
2.5 fl oz	4.5117188 in³
5 fl oz	9.0234375 in³
10 fl oz	18.046875 in³
15 fl oz	27.0703125 in³
20 fl oz	36.09375 in³
25 fl oz	45.1171875 in³
30 fl oz	54.140625 in³
50 fl oz	90.234375 in³

How to Convert Fluid Ounces to Cubic Inches

To convert fluid ounces to cubic inches, multiply the volume by the following conversion ratio: 1.8046875 cubic inches/fluid ounce.

Since one fluid ounce is equal to 1.8046875 cubic inches, you can use this simple formula to convert:

cubic inches = fluid ounces × 1.8046875

The volume in cubic inches is equal to the volume in fluid ounces multiplied by 1.8046875.

For example, here's how to convert 5 fluid ounces to cubic inches using the formula above.

cubic inches = (5 fl oz × 1.8046875) = 9.0234375 in³

How Many Cubic Inches Are in a Fluid Ounce?

There are 1.8046875 cubic inches in a fluid ounce, which is why we use this value in the formula above.

1 fl oz = 1.8046875 in³|1 in³ = 0.5541126 fl oz

Our fluid ounce to cubic inch calculator automatically converts your volume measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.

Fluid Ounces and cubic inches are both units used to measure volume. Keep reading to learn more about each unit.

What Is a Fluid Ounce?

A fluid ounce is a unit of volume equal to 0.0295735 liters (L), the base unit for volume. 1/128 of a US gallon (29.5735 mL). [1]

The fluid ounce is classified as a US customary unit of volume. Fluid Ounces can be abbreviated as fl oz; for example, 1 fluid ounce can be written as 1 fl oz.

When working with fluid ounces (fl oz) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.

In practice, fluid ounces (fl oz) are widely used across standard volume applications within US customary workflows, engineering documentation, and technical data sheets.

Learn more about fluid ounces in our Volume & Liquid Converter.

What Is a Cubic Inch?

A cubic inch is a unit of volume equal to 0.0163871 liters (L), the base unit for volume. Equal to 16.387064 milliliters. [2]

The cubic inch is classified as a US customary and imperial unit of volume. Cubic Inches can be abbreviated as in³; for example, 1 cubic inch can be written as 1 in³.

When working with cubic inches (in³) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.

In practice, cubic inches (in³) are widely used across standard volume applications within US customary and imperial workflows, engineering documentation, and technical data sheets.

Learn more about cubic inches in our Volume & Liquid Converter.

When converting volume between fluid ounces (fl oz) and cubic inches (in³), keep full floating-point precision (1 fl oz = 1.8046875 in³; 1 in³ = 0.5541126 fl oz) during intermediate calculations and round only the final cubic inch figure to match your instrument tolerance.

More Fluid Ounce & Cubic Inch Conversions

Need to calculate in the opposite direction? Use our cubic inches to fluid ounces (us) calculator to switch your starting unit immediately. You can also explore related tools such as converting cubic inches to fluid ounces (us), converting liters to cubic inches, or converting fluid ounces (us) to milliliters.

Convert from Fluid Ounces

Convert to Cubic Inches

Converting Grams or Ounces to Cups, Tbsp & Tsp?

Open Cooking & Ingredient Converter

Weight and volume require ingredient density (g/mL). Choose a USDA FoodData Central verified ingredient below:

Flour (125 g/cup)Granulated Sugar (200 g/cup)Brown Sugar (220 g/cup)Powdered Sugar (120 g/cup)Butter (227 g/cup)Rice (185 g/cup)Milk (244 g/cup)Water (236.6 g/cup)Honey (339 g/cup)Cooking Oil (218 g/cup)Salt (292 g/cup)

Frequently Asked Questions

There are 1.80469 cubic inches (in³) in 1 fluid ounce (fl oz). Conversely, 1 cubic inch (in³) is equal to 0.55411 fluid ounces (fl oz).

Volume & Liquid Converter

Quick Info

Direct Factor: 1 fluid ounce (us) (fl oz) equals 1.80469 cubic inches (in³).
Inverse Factor: 1 cubic inch (in³) equals 0.55411 fluid ounces (us) (fl oz).
Formula: cubic inches = fluid ounces (us) × 1.80469.
Verified Precision: Anchored to official NIST SP 811 and ISO/IEC 80000 standards.

Units Comparison

Fluid Ounce (US) (fl oz)

1/128 of a US gallon (29.5735 mL).

Cubic Inch (in³)

Equal to 16.387064 milliliters.

Liter (L)

Metric unit of volume equal to 1 cubic decimeter (1,000 mL).

References

[1]NIST OWM · SI Units — Volume
Source
[2]NIST HB 44 · Liquid & Dry Capacity Tables
Source
[3]NIST SP 811 · NIST SP 811 App. B.9
Source

Related Categories

Add This Calculator to Your Site

Free HTML widget · 4 embed formats

Embed the interactive Fluid Ounces (US) to Cubic Inches converter on your blog, classroom, or documentation page.

Customize & Get Embed Code

References

NIST · BIPM · ISO

[1]
NIST OWM (SI Units — Volume)·Volume & Liquid Metrology Standard — Fluid Ounces (US) (fl oz) to Cubic Inches (in³)
NIST OWM Standard
[2]
NIST HB 44 (Liquid & Dry Capacity Tables)·Unit Specifications: Fluid Ounce (US) (fl oz) & Cubic Inch (in³)
NIST HB 44 Specification
[3]
NIST SP 811 (NIST SP 811 App. B.9)·Conversion Factors & Mathematical Basis (fl oz to in³)
NIST SP 811 Reference

Measurement Navigator78 Categories9 Scientific Domains

Browse All 78 Measurement Categories

A–Z Directory →Sitemap

Common ConvertersEveryday metric, imperial, and US customary converters for length, weight, volume, temperature, area, pressure, energy, speed, time, and data.