Ounces to Milliliters Calculator: Convert oz to ml Easily
Convert fluid ounces (oz) to milliliters (ml) accurately with our easy-to-use calculator—ideal for recipes, travel, healthcare, and more.
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Understanding the Conversion from Ounces to Milliliters
The fluid ounce and milliliter are both common units for measuring volume, especially in the fields of cooking, pharmacy, and science. While the ounce is used primarily in the United States and a few other regions, the milliliter is part of the metric system and is widely used worldwide. Understanding the relationship between these two units is crucial for international recipes, medication dosing, and scientific experiments.
What Is a Fluid Ounce (oz)?
A fluid ounce (fl oz) is a unit of volume used in the imperial and U.S. customary systems. In the U.S., 1 fluid ounce equals exactly 29.5735295625 milliliters. Note that the UK fluid ounce is different and equals approximately 28.413 ml, but this calculator uses the U.S. fluid ounce standard.
What Is a Milliliter (ml)?
A milliliter is a metric unit of volume. It is equal to one-thousandth of a liter. The milliliter is used globally in scientific, culinary, and medical contexts. It’s a convenient unit for measuring small liquid amounts and is commonly found on nutritional labels, medicine bottles, and recipes.
Conversion Formula
Milliliters = Ounces × 29.5735295625
Example: 5 oz × 29.5735295625 = 147.8676 mlOunces to Milliliters Conversion Table
| Ounces (oz) | Milliliters (ml) |
|---|---|
| 1 | 29.57 |
| 2 | 59.15 |
| 4 | 118.29 |
| 8 | 236.59 |
| 16 | 473.18 |
| 32 | 946.35 |
| 64 | 1892.71 |
When Do You Need to Convert oz to ml?
- Cooking and Baking: Many international recipes use ounces while others use milliliters—knowing the conversion ensures accurate results.
- Travel and Packing: Liquid restrictions on flights are measured in milliliters, so knowing the ml equivalent of ounces helps comply with regulations.
- Health and Medicine: Medicine doses in the U.S. might use ounces, but international instructions typically list milliliters.
- Beverage Industry: Drink volumes are often listed in both units on labels for global distribution.
Key Differences Between Ounces and Milliliters
| Aspect | Fluid Ounce (US) | Milliliter (ml) |
|---|---|---|
| System | US Customary | Metric (SI) |
| Abbreviation | oz or fl oz | ml |
| Exact Value | 29.5735 ml | 1 ml |
| Common Uses | US recipes, beverages | Global medicine, science |
FAQ: Ounces to Milliliters
Is 1 oz the same as 30 ml?
Not exactly. One U.S. fluid ounce equals 29.5735 ml. Rounding to 30 ml is common for rough estimates.
What about UK ounces?
UK fluid ounces are different from U.S. ones. One UK fl oz ≈ 28.41 ml. This tool uses U.S. conversions only.
Can I use this for perfume or medication?
Yes, it’s often used to convert small liquid measurements like perfume, essential oils, and medicine doses.
Is there a difference between dry ounces and fluid ounces?
Yes. Dry ounces measure weight, while fluid ounces measure volume. This calculator is only for fluid ounces.
Helpful Tip
If you're ever in doubt while converting ounces to milliliters, remember that 1 oz ≈ 30 ml is a useful approximation for day-to-day use. However, for precise tasks like medication or scientific measurements, always use the exact value of 29.5735 ml per ounce.
Conclusion
Whether you're following a recipe, measuring medication, or packing for a trip, converting fluid ounces to milliliters ensures accuracy and consistency across global standards. Our calculator simplifies the process and helps you work seamlessly between U.S. and metric systems.