Free to Use

Ounce to Milliliter Converter

Convert US fluid ounces to milliliters and milliliters to fluid ounces instantly. Perfect for cooking, baking, and recipe measurements with accurate volume conversions.

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US Fluid Ounces (fl oz) Milliliters (mL) Common Use
1 fl oz29.57 mLSingle shot / small serving
2 fl oz59.15 mLDouble shot / small condiment
4 fl oz118.29 mLHalf cup / juice serving
8 fl oz236.59 mLOne cup / standard drink
12 fl oz354.88 mLCan of soda / beer
16 fl oz473.18 mLPint / water bottle
20 fl oz591.47 mLLarge beverage bottle
32 fl oz946.35 mLQuart / large water bottle
64 fl oz1,892.70 mLHalf gallon / large pitcher
128 fl oz3,785.41 mLGallon / bulk beverage

How to Use the Ounce to Milliliter Converter

Converting Fluid Ounces to Milliliters

Enter the volume in US fluid ounces in the left input field. The equivalent value in milliliters will automatically update in the right field. You can also click the "Convert fl oz to mL" button for a manual conversion.

Converting Milliliters to Fluid Ounces

Enter the volume in milliliters in the right input field, and the equivalent value in fluid ounces will appear in the left field. Use the "Convert mL to fl oz" button or simply type in either field for instant bidirectional conversion.

Using the Conversion Table

The conversion table below the calculator provides common fluid ounce measurements with their exact milliliter equivalents. Refer to this table for standard recipe conversions and beverage measurements without needing to calculate manually.

Real-World Examples

๐Ÿฅค Can of Soda: A standard 12 fl oz can of soda equals approximately 354.88 mL.

๐Ÿ’ง Daily Water Intake: The recommended 64 fl oz (half gallon) of daily water equals about 1,892.70 mL or 1.89 liters.

๐Ÿธ Cocktail Recipe: A recipe calling for 1.5 fl oz of spirit equals approximately 44.36 mL.

Conversion Formula

Standard Conversion Factor

1 US fluid ounce = 29.5735 milliliters (mL)

Fluid Ounces to Milliliters:
mL = fl oz ร— 29.5735
Milliliters to Fluid Ounces:
fl oz = mL รท 29.5735

Note: This converter uses the US customary fluid ounce (29.5735 mL). The UK imperial fluid ounce (28.4131 mL) is different โ€” see the FAQ section for more details on the differences.

Features

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High Precision
Accurate conversions using the exact US fluid ounce standard of 29.5735 mL for reliable results every time.
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Instant Results
Real-time bidirectional conversion as you type in either the fluid ounces or milliliters field.
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Bidirectional
Convert both ways with dedicated buttons โ€” fl oz to mL and mL to fl oz with a single click.
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Conversion Table
Handy reference table with 10 common fluid ounce measurements from 1 fl oz to 128 fl oz with exact mL equivalents.
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Mobile Optimized
Responsive design that works perfectly on smartphones, tablets, and desktop computers for measurements on the go.
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Privacy Protected
All conversions performed locally in your browser with no data collection or storage. No internet required after page load.

Common Uses for Ounce to Milliliter Conversions

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Cooking & Baking
Convert US recipe measurements that use fluid ounces to metric milliliters for international cooking. Perfect for scaling recipes from American cookbooks.
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Beverage Preparation
Measure and convert beverage servings, cocktail recipes, and drink bottle capacities between fluid ounces and milliliters.
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Medicine & Supplements
Convert liquid medication dosages and supplement serving sizes between oz and mL for accurate administration.
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Science & Education
Learn about volume relationships between US customary and metric units. Ideal for classroom demonstrations and STEM education.

Tips for Accurate Volume Conversion

US Fluid Ounce vs Imperial Fluid Ounce

Fluid Ounces vs Weight Ounces

Do not confuse fluid ounces (a measure of volume) with avoirdupois ounces (a measure of weight/mass). One fluid ounce of water weighs approximately 1.043 ounces by weight, but this varies by ingredient density. This converter handles fluid ounces (volume) only.

Temperature Considerations

Volume measurements can vary slightly with temperature. Water and most liquids expand when heated and contract when cooled. For the most precise measurements, use ingredients at room temperature unless otherwise specified in your recipe.

Frequently Asked Questions (FAQ)

How many milliliters are in a US fluid ounce?
One US fluid ounce equals exactly 29.5735 milliliters. This is the standard used in American recipes and by this converter. For practical purposes, many people round this to 30 mL, but our converter uses the precise value for maximum accuracy.
What is the difference between US and UK fluid ounces?
The US fluid ounce is 29.5735 mL, while the UK (Imperial) fluid ounce is 28.4131 mL โ€” about 4% smaller. This means a UK pint (20 fl oz) is 568.26 mL, while a US pint (16 fl oz) is 473.18 mL. Always check which standard your recipe uses. In Australia and New Zealand, recipes typically use metric measurements (milliliters) rather than fluid ounces.
How many mL is 8 fl oz (one cup)?
Eight US fluid ounces (1 US cup) equals approximately 236.59 mL. This is one of the most common conversions, used in countless recipes for water, milk, broth, and other liquid ingredients. One US cup is exactly 8 US fluid ounces.
How many ounces are in 750 mL (standard wine bottle)?
A standard 750 mL wine bottle contains approximately 25.36 US fluid ounces. This is equivalent to about 5 standard wine servings of 5 fl oz each, or about 3.13 cups. The 750 mL bottle is the international standard wine bottle size.
Is a fluid ounce the same as a weight ounce?
No. A fluid ounce measures volume (how much space a liquid occupies), while an avoirdupois ounce measures weight/mass. One fluid ounce of water weighs approximately 1.043 ounces by weight, but this ratio changes for other liquids. For example, 1 fluid ounce of honey weighs more than 1 fluid ounce of water due to higher density. This converter works with fluid ounces (volume) only.
What about metric vs imperial differences in Australia and the UK?
In Australia and the UK, the metric system is standard for most measurements, including cooking. Australian recipes typically use milliliters (mL) and liters (L) rather than fluid ounces. If you encounter a UK recipe using fluid ounces, those are Imperial fluid ounces (28.4131 mL), not US fluid ounces (29.5735 mL). Our converter uses US fluid ounces, so for UK/Australian recipes with metric measurements, simply enter the milliliter value and convert to US fl oz if needed.

About This Ounce to Milliliter Converter

Our Ounce to Milliliter Converter is a free online tool designed to help cooks, bakers, bartenders, and anyone working with volume measurements to quickly and accurately convert between US fluid ounces and milliliters. Whether you're following an American recipe with metric ingredients, scaling your favorite beverages, or simply trying to understand volume measurements, this converter provides instant bidirectional conversion with high precision.

Why Choose Our Converter?

Accurate Standard
Uses the official US fluid ounce standard (29.5735 mL) for precise cooking, baking, and beverage measurements.
Bidirectional
Convert both ways instantly โ€” enter a value in either field for automatic conversion in the other.
Comprehensive Table
Includes a reference table with 10 common volume measurements from 1 fl oz to 128 fl oz (1 gallon).
No Installation
Works directly in your browser on any device without downloads, registrations, or logins.
Privacy Protected
All calculations are performed locally in your browser. No data is sent to any server.
Always Free
Complete access to all conversion features with no hidden costs or subscription requirements.

Warning: While we strive to ensure the accuracy of all conversions using the US fluid ounce standard (29.5735 mL), this tool is provided for general reference. For critical applications in scientific, medical, or commercial contexts, please verify results with appropriate professional standards. Recipe measurements may vary โ€” always check whether your recipe uses US or Imperial fluid ounces. This converter uses US fluid ounces, not Imperial/UK fluid ounces.