Ounces to Milliliters Converter - Convert fluid ounces to milliliters (fl oz to mL)
Convert using the exact US liquid identity mL = fl oz × 29.5735295625, where fl oz means US fluid ounces. The reverse mapping is fl oz = mL ÷ 29.5735295625. The calculator keeps full internal precision and only switches to scientific notation for very large or very small values so that normal drink and recipe amounts stay easy to read.
US liquid identity: 1 US fluid ounce = 29.5735295625 milliliters. This converter assumes US fl oz, not imperial fluid ounces. See all volume unit converters.
About Ounces to Milliliters
This converter helps you translate US fluid ounce measures into precise milliliter values. Fluid ounces are widely used in US drink menus, coffee cups, and cocktail recipes. Milliliters are the standard for metric glassware, measuring jugs, and packaged beverages. Converting fl oz to mL allows you to move easily between US customary recipes and metric equipment without guessing or using approximate rules of thumb.
By basing the tool on the exact US fluid ounce definition, you can rely on the results for both casual and professional applications. Whether you are designing a coffee menu, scaling cocktail recipes for a metric bar, or adapting US cookbook recipes for a kitchen that uses milliliter markings, the same dependable factor mL = fl oz × 29.5735295625 underpins every calculation. The sections below explain the formula, define each unit, and provide step by step guidance and ready to use tables that you can reuse in training materials and SOPs.
Ounces to Milliliters Formula
Exact relationship for US fluid ounces
mL = fl oz × 29.5735295625
// inverse
fl oz = mL ÷ 29.5735295625Anchor checks for quick validation:
1 fl oz ≈ 29.5735 mL
2 fl oz ≈ 59.1471 mL
4 fl oz ≈ 118.2941 mL
8 fl oz ≈ 236.5882 mL
12 fl oz ≈ 354.8824 mL
16 fl oz ≈ 473.1765 mLRelated Volume Converters
What Are Fluid Ounces and Milliliters?
US Fluid Ounces
A US fluid ounce is a unit of volume used for drinks, liquid ingredients, and serving sizes in the US customary system. It is defined through the US gallon, which leads to the exact identity 1 fl oz = 29.5735295625 mL. Fluid ounces are not the same as weight ounces. Fluid ounces measure capacity, while ounces as a weight unit measure mass. When recipes or bar specs mention ounces for liquids, they almost always mean fluid ounces.
You will encounter fluid ounces on drink menus, cocktail recipes, coffee shop cup sizes, and brewing guides. Many jiggers and bar tools are marked in fl oz, while many jugs and measuring cylinders are marked in milliliters. Being able to convert between these scales lets you match US style recipes to metric glassware and equipment with confidence.
Milliliters
The milliliter is a small metric unit of volume equal to one thousandth of a liter. It is the default on most metric measuring jugs, bottles, cartons, and lab style cylinders. Milliliters provide fine resolution that works well for both small drink adjustments and larger container sizes, and they are easy to scale up or down when you change serving sizes.
When you convert from fluid ounces to milliliters, you gain access to the precision and international compatibility of metric units without losing the familiarity of fl oz based recipes. This is helpful in mixed environments where some tools are designed for US customary units and others only show metric markings.
Step-by-Step: Converting ounces to milliliters
- Confirm that your recipe or menu uses US fluid ounces, not weight ounces or imperial ounces.
- Take the volume in fluid ounces and multiply by 29.5735295625 using mL = fl oz × 29.5735295625.
- Round the result once at the end to match your measuring equipment, usually to the nearest whole milliliter.
- If you share the recipe, list both fl oz and mL so that readers using different equipment can reproduce the drink or dish accurately.
Example walkthrough:
Input: 1.5 fl oz of simple syrup
Compute: mL = 1.5 × 29.5735295625 ≈ 44.3603
Output: about 44 mL (or 44.4 mL if you keep one decimal place)Applications and Context
Cocktails and bar service
Many cocktail specs are written in ounces while modern jiggers and measuring glasses often carry both mL and fl oz marks. Converting ounces to milliliters lets you standardize pour sizes, design training materials in metric, and align recipes across multiple locations, even when glassware varies slightly from bar to bar.
Coffee shops and drink menus
Coffee and tea menus use ounce based sizes like 8 oz, 12 oz, and 16 oz drinks, while equipment such as kettles and brewers may have metric only markings. Using ounces to milliliters conversion, you can translate menu sizes into target brew volumes, calibrate kettles, and record espresso recipes in mL for precise adjustments.
Recipe development and publishing
Food and drink writers regularly write for both US and international audiences. Converting fluid ounces to milliliters allows you to publish recipes that show both units side by side. This makes it easier for metric readers to follow your instructions and reduces confusion about what each serving size actually means in their glassware or jugs.
Common Conversions (ounces → milliliters)
| US Fluid Ounces (fl oz) | Milliliters (mL) |
|---|---|
| 1 | 29.57 |
| 2 | 59.15 |
| 4 | 118.29 |
| 6 | 177.44 |
| 8 | 236.59 |
| 10 | 295.74 |
| 12 | 354.88 |
| 14 | 414.03 |
| 16 | 473.18 |
| 20 | 591.47 |
Quick Reference Table (Reverse: milliliters → ounces)
| Milliliters (mL) | US Fluid Ounces (fl oz) |
|---|---|
| 30 | 1.02 |
| 60 | 2.03 |
| 120 | 4.06 |
| 180 | 6.09 |
| 240 | 8.12 |
| 300 | 10.14 |
| 350 | 11.84 |
| 355 | 12.01 |
| 400 | 13.53 |
| 500 | 16.91 |
Precision, Rounding & Significant Figures
Operational rounding
For ounces to milliliters conversion, compute with the full factor 29.5735295625 and then round once at the end. For everyday drinks, rounding to the nearest whole milliliter is usually enough. For bar specs, you might keep one decimal place. Keeping the exact constant in your documentation while rounding outputs only when displayed helps avoid drift across recipes and spreadsheets.
Consistent documentation
In bar manuals, coffee training guides, and recipe sheets, clearly state that you are using US fluid ounces and that 1 fl oz equals 29.5735295625 mL. Include a small conversion chart and at least one worked example so that staff and readers can verify that their equipment and mental models match your standard.
Where This Converter Is Used
- Adapting US cocktail recipes to metric jiggers and graduated mixing glasses.
- Translating coffee cup sizes and drink menus from fl oz to mL for metric customers.
- Writing drink recipes that show both fluid ounces and milliliters side by side.
- Designing beverage packaging where serving sizes originate in fl oz but labels must show mL.
- Teaching baristas and bartenders how US fluid ounces correspond to metric volumes in practice.
Frequently Asked Questions
What is the exact formula to convert fluid ounces to milliliters?
For US liquid measures, 1 fluid ounce is defined as exactly 29.5735295625 milliliters. The ounces to milliliters formula is mL = fl oz × 29.5735295625. To go in the reverse direction you can use fl oz = mL ÷ 29.5735295625. This identity is based on official US customary definitions and is suitable for accurate recipe, bar, and beverage work.
Are these US fluid ounces or UK imperial fluid ounces in this ounces to milliliters calculator?
This ounces to milliliters calculator uses US fluid ounces. One US fl oz is exactly 29.5735295625 mL. The UK imperial fluid ounce is slightly different and would give a different number of milliliters per ounce. When you convert ounces to milliliters for recipes or drinks, always check whether the original instructions assume US or imperial measures.
How many milliliters are in 8 oz and 12 oz drinks using fl oz to mL conversion?
Using mL = fl oz × 29.5735295625, an 8 fl oz drink is 8 × 29.5735295625 ≈ 236.588 mL, which is close to 240 mL in everyday terms. A 12 fl oz drink is 12 × 29.5735295625 ≈ 354.882 mL. These sizes are common for coffee cups, canned drinks, and soft drinks in US style serving sizes.
How do I convert fluid ounces to milliliters step by step for a recipe or cocktail?
To convert fluid ounces to milliliters, start with the number of US fluid ounces, multiply by 29.5735295625 using mL = fl oz × 29.5735295625, and then round once at the end. For example, if a recipe calls for 1.5 fl oz of lime juice, multiply 1.5 by 29.5735295625 to get about 44.36 mL. You can round to 44 mL or 45 mL depending on the precision of your measuring jug.
Is this ounces to milliliters converter accurate enough for cocktails, coffee, and brewing?
Yes. Because this converter uses the exact US fluid ounce definition, it is more than accurate enough for cocktails, coffee, tea, and most brewing applications. In practice, the main sources of variation are glassware shape and how precisely you pour, not the underlying conversion factor, so mL = fl oz × 29.5735295625 is considered precise for professional use.
Can I use the ounces to milliliters formula in Excel, Google Sheets, or bar software?
You can apply the same formula in spreadsheets and inventory tools. If the fluid ounce value is stored in cell A1, you can convert to milliliters with =A1*29.5735295625. In bar or cafe software, multiply the entered ounce values by 29.5735295625 to store a milliliter equivalent for costing, stock control, and pour size analysis.
What are useful anchor pairs for converting ounces to milliliters in the bar and kitchen?
Helpful anchors include 1 fl oz ≈ 29.57 mL, 2 fl oz ≈ 59.15 mL, 4 fl oz ≈ 118.29 mL, 6 fl oz ≈ 177.44 mL, 8 fl oz ≈ 236.59 mL, 12 fl oz ≈ 354.88 mL, and 16 fl oz ≈ 473.18 mL. Remembering these pairs makes it easier to sanity check drink volumes and cup sizes without a calculator.
Can this ounces to milliliters calculator handle decimal and half ounce measures?
Yes. The relationship mL = fl oz × 29.5735295625 is linear, so it works with decimal and fractional ounce values. For example, 0.5 fl oz is about 14.79 mL, and 1.25 fl oz is about 36.97 mL. This is useful when you scale drink recipes or espresso brew ratios that use partial ounce measures.
How should I round ounces to milliliters for practical kitchen and bar use?
For most recipes and drinks, rounding to the nearest whole milliliter is perfectly fine, and many professionals round to the nearest half milliliter only for more sensitive applications. For menu descriptions or training materials, you can present nicely rounded values like 30 mL for 1 fl oz and 60 mL for 2 fl oz while keeping exact values in your internal notes.
Can I use this ounces to milliliters converter for both water and other liquids?
Yes. Ounces and milliliters are volume units, so the conversion does not depend on the liquid. You can convert US fluid ounces of water, juice, syrups, milk, or spirits to milliliters with the same factor. If you need mass in grams, you will need to apply density after converting the volume, especially for liquids like syrups or oils.
Where is ounces to milliliters conversion used in real world workflows?
Ounces to milliliters conversion is widely used in coffee shops to describe cup sizes, in bars to translate recipes into metric jigger pours, in home kitchens when adapting US recipes to metric equipment, and in beverage manufacturing where US oriented serving sizes must be reconciled with metric packaging and labeling rules.
Does this ounces to mL converter help when sharing US recipes with metric audiences?
Yes. When you convert fluid ounces to milliliters, you can publish recipes and drink menus that show both US fl oz and mL. This makes your content more accessible to metric readers and makes it easier for them to recreate your drinks and recipes using their own jugs, scales, and glassware marked in milliliters.
Tips for Working with ounces & milliliters
- Confirm that recipes use US fluid ounces, not weight ounces, before converting to milliliters.
- Memorize simple anchors like 1 fl oz ≈ 30 mL and 8 fl oz ≈ 240 mL for quick menu checks.
- Store recipe and costing data in milliliters and convert to fl oz only for human facing materials.
- Standardize glassware and jigger sizes so that ounce and milliliter marks line up with your recipes.
- Include both fl oz and mL on training sheets so staff who think in either system can follow instructions.
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