Milliliters to Ounces Converter - Convert mL to fl oz Instantly
Convert milliliters (mL) to US fluid ounces (fl oz) quickly and accurately with this easy-to-use volume converter. Ideal for cooking, beverages, baby bottles, lab work, and any application requiring precise liquid measurements.
Note: This tool converts milliliters to US fluid ounces. For Imperial (UK) fluid ounces, use the dedicated mL to UK fl oz converter.
About Milliliters to Ounces Conversion
Milliliters (mL) and fluid ounces (fl oz) both measure volume, not weight. The milliliter is part of the SI (metric) system and appears on beverage labels, baby bottles, medical syringes, and lab glassware around the world. The US fluid ounce is a US customary unit common on recipes, nutrition labels, and beverage packaging in the United States.
The relationship between the two units is defined exactly: 1 US fluid ounce = 29.5735295625 mL. To convert milliliters to ounces, divide by this factor. This ensures your numbers are consistent across cooking, bartending, baby feeding, lab protocols, and packaging documents.
Milliliters to Ounces Formula
Use the direct factor method:
US fl oz = mL ÷ 29.5735295625Example:
250 mL = 250 ÷ 29.5735295625 = 8.45351 US fl oz
To go the other way:
mL = US fl oz × 29.5735295625.
US vs Imperial (UK) Fluid Ounces
The US fluid ounce and the Imperial (UK) fluid ounce are not the same. One UK fl oz equals 28.4130625 mL, which makes it slightly smaller than the US fl oz (29.5735295625 mL). This page converts to US fluid ounces. If your source cites UK fl oz, use the UK-specific converter to avoid errors that compound in recipes, dosing, or packaging.
Why Convert mL to fl oz?
- 🍳 Cooking & baking: Translate metric recipes to US customary units.
- 🍹 Bartending: Convert mL-based measures to ounce pours for consistency.
- 🍼 Baby feeding: Compare bottle markings (mL) with feeding guidance (fl oz).
- 🧪 Lab & medical: Align mL instruments with US documentation.
- 🥤 Beverage packaging: Prepare labels and QA checks across markets.
Common Conversions
- 30 mL = 1.01442 US fl oz
- 50 mL = 1.69070 US fl oz
- 100 mL = 3.38140 US fl oz
- 250 mL = 8.45351 US fl oz
- 500 mL = 16.90701 US fl oz
- 750 mL = 25.36052 US fl oz
- 1000 mL = 33.81402 US fl oz
What is a Milliliter?
A milliliter is one-thousandth of a liter and is widely used for small liquid quantities in kitchens, pharmacies, hospitals, and laboratories. It pairs naturally with teaspoons (5 mL), tablespoons (15 mL), and larger metric units like the liter (L).
What is a US Fluid Ounce?
A US fluid ounce is a unit of liquid volume in the US customary system. It is exactly 1/128 of a US gallon and equals 29.5735295625 mL. You’ll see fl oz used in drink sizes, nutrition information, and US-focused recipes.
Step-by-Step: Converting mL to US fl oz
- Write down your volume in milliliters.
- Divide by 29.5735295625.
- Express the result in US fl oz.
Example walkthrough:
Input: 355 mL
Divide: 355 ÷ 29.5735295625 = 12.00339
Output: 12.00339 US fl ozPrecision, Rounding & Significant Figures
For everyday use, 2–3 decimal places may be sufficient, but this tool defaults to 5 for high precision. In technical contexts, match the number of significant figures to your measuring instruments and reporting standards to avoid rounding bias in chained calculations.
Use Cases of mL → fl oz
- 🥣 Scaling international recipes to US kitchens
- 🍸 Standardizing cocktail pours and tastings
- 🍼 Tracking infant intake across metric and US units
- 🧫 Preparing lab solutions recorded in US documentation
- 🧃 Auditing beverage fill volumes on production lines
Quick Reference Table
| Milliliters (mL) | Ounces (US fl oz) |
|---|---|
| 30 | 1.01442 |
| 50 | 1.69070 |
| 100 | 3.38140 |
| 250 | 8.45351 |
| 500 | 16.90701 |
| 750 | 25.36052 |
| 1000 | 33.81402 |
Frequently Asked Questions
How do you convert milliliters to ounces?
Use the formula: US fluid ounces = milliliters ÷ 29.5735295625. One US fluid ounce equals exactly 29.5735295625 mL.
How many ounces are in 1 milliliter?
1 mL ≈ 0.033814 US fluid ounces. For quick estimates you can use 0.03381.
Does this tool use US fluid ounces or Imperial (UK) fluid ounces?
This page converts to US fluid ounces (fl oz). Imperial (UK) fluid ounces are different (1 UK fl oz = 28.4130625 mL). Use the dedicated UK page for that conversion.
How many milliliters are in 1 ounce?
1 US fluid ounce is exactly 29.5735295625 milliliters. To convert ounces to mL, multiply by this factor.
Is there a difference between ounces (weight) and fluid ounces (volume)?
Yes. Ounces (oz) measure weight (mass), while fluid ounces (fl oz) measure volume. This page converts volume (mL to US fluid ounces).
Tips for Accurate Kitchen & Lab Measures
- Use graduated tools (syringes, cylinders, or measuring cups) to reduce parallax error.
- Clearly label whether outputs are in US or UK fl oz to avoid mix-ups.
- For very small amounts, consider teaspoons (5 mL) and tablespoons (15 mL) as convenient metric references.