What is Fluid Ounces to mL Converter?

This tool converts US fluid ounces to milliliters, helping you work with international recipes, understand product labels from different countries, and communicate measurements across the metric/imperial divide.

The Conversion Factor

One US fluid ounce equals exactly 29.5735 milliliters. For most practical purposes, rounding to 30 mL per fluid ounce works well and simplifies calculations.

When You Need This Conversion

Home cooks: Adapting American recipes for metric measuring tools
Bartenders: Making cocktails with metric jiggers
Healthcare: Converting fluid ounce instructions to mL for accuracy
International shoppers: Comparing US product sizes to metric equivalents

Beverage Context

Common drink sizes in both units:

Shot glass: 1.5 fl oz = 44 mL
Small coffee: 8 fl oz = 237 mL
Can of soda: 12 fl oz = 355 mL
Water bottle: 16.9 fl oz = 500 mL

Privacy

All conversions are performed locally. No data leaves your device.

How to Use

Converting fluid ounces to milliliters is simple:

Enter the fluid ounce amount from your recipe or product
Read the mL equivalent displayed instantly
Copy if needed for your recipe notes

Two-Way Conversion

The converter works both directions. Enter a value in either field, and the other updates automatically.

Mental Math Shortcut

For quick estimates:

Multiply fluid ounces by 30 for a close approximation
Example: 4 fl oz × 30 = 120 mL (actual: 118.3 mL)
This is accurate enough for most cooking purposes

Recipe Conversion Example

Converting an American cake recipe:

¼ cup milk (2 fl oz) = 59 mL
½ cup oil (4 fl oz) = 118 mL
1 cup buttermilk (8 fl oz) = 237 mL

Features

Accurate Conversion

Uses the precise conversion factor of 29.5735 mL per fluid ounce. Results show enough decimal places for both cooking and scientific needs.

Real-Time Results

See the conversion as you type. No need to press enter or click a button.

Reference Table

Common fluid ounce to mL conversions:

1 fl oz = 29.57 mL
2 fl oz = 59.15 mL (¼ cup)
4 fl oz = 118.29 mL (½ cup)
8 fl oz = 236.59 mL (1 cup)
12 fl oz = 354.88 mL (soda can)
16 fl oz = 473.18 mL (1 pint)

Easy Copying

Copy button for the result lets you quickly add converted measurements to digital recipe collections.

Additional Units

Dropdown menus allow switching to other volume units for more complex conversions.

Frequently Asked Questions

How many mL are in 1 fluid ounce?

One US fluid ounce equals 29.57 mL. For quick cooking measurements, rounding to 30 mL is common and acceptable.

How many mL are in 8 oz?

8 fluid ounces (one US cup) equals 236.59 mL. This is why you sometimes see "240 mL" on American products—it's a convenient rounding.

Should I use 30 mL or 29.57 mL for 1 oz?

For cooking, 30 mL is fine and easier to measure. For medication, science, or precision baking, use the exact 29.57 mL. The 1.5% difference rarely matters in everyday cooking.

What's the difference between US and UK fluid ounces?

A US fluid ounce is 29.57 mL, while a UK fluid ounce is 28.41 mL. This converter uses US fluid ounces, which are standard in American recipes.

How do I convert a 12 oz can to mL?

A 12 fl oz can equals 355 mL. This is the standard size for soda cans in the US, often sold as "350 mL" internationally.

Why do some recipes use mL instead of cups?

Metric measurements (mL, grams) are more precise than volume measurements (cups, tablespoons). Professional bakers often prefer metric because it's more consistent and accurate.

Fluid Ounces to mL