# mL to oz Converter (Fluid Ounces)

URL: https://speedycalculator.com/calculators/conversion/ml-to-oz/
Last updated: 2026-10-25

> Convert millilitres (mL) to US fluid ounces (US fl oz): 1 millilitre = 0.033814023 US fl oz, so multiply by 0.033814023 or divide by 29.57353. Both fields are editable, so you can also type in US fluid ounces and get millilitres back.

## Inputs

- Millilitres (mL)

## Results

- US fluid ounces

## Formula

```
1 mL = 0.033814023 US fl oz
1 US fl oz = 29.57353 mL
US fl oz = mL × 0.033814023
```

## Explanation

Millilitres to fluid ounces matters for drinks, cosmetics, medicine cups and recipes. U.S. and UK fluid ounces differ by about 4%: 1 US fl oz = 29.5735 mL, 1 UK fl oz = 28.4131 mL.

### How to use the mL to oz Converter

- Type the number of millilitres into the **Millilitres** field. Decimals such as 50 are fine.
- Read the answer in **US fluid ounces** – it updates as you type, with no button to press.
- To convert the other way, type into **US fluid ounces** and the millilitres are recalculated.
- Press **Copy results** to copy both values with the page title, or **Copy link** to share this exact conversion.

This page converts only mL ⇄ US fl oz. Need a different unit? Use the general volume converter, where you can choose any “from” and “to” unit.

### How it works

Both units measure volume, so they are always in the same ratio: one millilitre equals 0.033814023 US fluid ounces. The calculator multiplies the number of millilitres you type by 0.033814023 to give US fluid ounces, and when you type into the US fluid ounces field it divides by the same factor to give millilitres. Because the ratio never changes, doubling the millilitres always doubles the US fluid ounces. Results are calculated at full precision and rounded only for display (up to eight decimal places, with very large or small values shown in scientific notation).

### How to convert millilitres to US fluid ounces

- Write down the value in millilitres, for example **100 mL**.
- Multiply by the conversion factor 0.033814023 (because 1 millilitre = 0.033814023 US fl oz).
- 100 × 0.033814023 = **3.3814023 US fl oz**.
- To go back from US fluid ounces to millilitres, divide by 0.033814023 – or multiply by 29.57353.

### mL to US fl oz conversion table

MillilitresUS fluid ouncesUS fluid ouncesMillilitres5 mL0.16907011 US fl oz1 US fl oz29.57353 mL10 mL0.33814023 US fl oz2 US fl oz59.147059 mL30 mL1.0144207 US fl oz5 US fl oz147.86765 mL50 mL1.6907011 US fl oz10 US fl oz295.7353 mL100 mL3.3814023 US fl oz20 US fl oz591.47059 mL120 mL4.0576827 US fl oz50 US fl oz1,478.6765 mL200 mL6.7628045 US fl oz100 US fl oz2,957.353 mL250 mL8.4535057 US fl oz1,000 US fl oz29,573.53 mL355 mL12.003978 US fl oz473 mL15.994033 US fl oz750 mL25.360517 US fl oz1,000 mL33.814023 US fl oz

### What is a millilitre?

A millilitre is one thousandth of a litre and exactly one cubic centimetre. Medicines, cosmetics, drinks and kitchen measures are labelled in mL.

### What is a US fluid ounce?

The U.S. fluid ounce is 1/128 of a U.S. gallon, about 29.57 mL. It is a unit of volume: a fluid ounce of water weighs about one ounce, but other liquids do not.

### Quick mental conversion

For a fast estimate, multiply millilitres by about **0.034** to get US fluid ounces; the error is about 0.6%. Use the calculator above when you need the exact figure.

### Common mistakes to avoid

Mixing u.s. and uk gallons, pints and fluid ounces, assuming a cup is always 250 ml, and treating volume and weight as interchangeable for anything except water.

## Worked example

Inputs — Millilitres: 100 mL.

Results — **US fluid ounces = 3.38140227 US fl oz**.

## FAQ

**How many oz is 500 mL?**
About 16.9 US fl oz.

**Is a fluid ounce a weight?**
No, it measures volume; an ounce of weight is different.

**How many US fluid ounces are in one millilitre?**
1 mL = 0.033814023 US fl oz.

**How many millilitres are in one US fluid ounce?**
1 US fl oz = 29.57353 mL.

**How do I convert millilitres to US fluid ounces?**
Multiply the number of millilitres by 0.033814023. For example, 100 mL × 0.033814023 = 3.3814023 US fl oz.

**How do I convert US fluid ounces back to millilitres?**
Divide by 0.033814023 (or multiply by 29.57353), or simply type the value into the US fluid ounces field above.

**What is 10 mL in US fluid ounces?**
10 mL = 0.33814023 US fl oz.

**What is 5 mL in US fluid ounces?**
5 mL = 0.16907011 US fl oz.

**Is this conversion exact?**
Yes. The factor comes from the official definitions of both units (NIST and the SI), so the only difference you may see is rounding in the last displayed digit.

**Can I convert to other units on this page?**
This page converts only between millilitres and US fluid ounces. To pick any volume unit, use the general volume converter linked under Related calculators.

**What formula does the mL to oz Converter use?**
1 mL = 0.033814023 US fl oz.


## Sources

- [NIST Special Publication 811 – Guide for the Use of the International System of Units](https://www.nist.gov/pml/special-publication-811)
- [NIST Handbook 44 Appendix C – General tables of units of measurement](https://www.nist.gov/pml/owm/nist-handbook-44-current-edition)