How to Convert Millilitres to US fluid ounces (ml to fl oz)
Volume conversions help with baking from American recipes, comparing petrol prices quoted per gallon abroad with pump prices per litre here, and reading PUB water bills in cubic metres. This guide shows how to convert millilitres into us fluid ounces by hand, with examples and a quick-reference table.
The conversion
To convert millilitres to us fluid ounces, multiply the value by 0.0338140565. To go the other way, divide by the same number (or multiply by 29.5735). For a quick estimate, multiply by about 0.034.
US fluid ounces = millilitres × 0.0338140565
Worked examples
- 3 ml = 0.101442 fl oz
- 12.5 ml = 0.422676 fl oz
- 75 ml = 2.5361 fl oz
Millilitres to US fluid ounces table
| Millilitres | US fluid ounces |
|---|---|
| 1 ml | 0.033814 fl oz |
| 2 ml | 0.067628 fl oz |
| 5 ml | 0.16907 fl oz |
| 10 ml | 0.338141 fl oz |
| 20 ml | 0.676281 fl oz |
| 25 ml | 0.845351 fl oz |
| 50 ml | 1.6907 fl oz |
| 100 ml | 3.3814 fl oz |
| 250 ml | 8.4535 fl oz |
| 500 ml | 16.907 fl oz |
| 1,000 ml | 33.8141 fl oz |
Common questions
Is ml to fl oz exact?
The factors used here are the internationally defined values where they exist; results are rounded for display only.
How do I convert back?
Use the US fluid ounces to Millilitres converter.
Mistakes to avoid
Multiplying when you should divide
Converting to a smaller unit gives a bigger number, and converting to a larger unit gives a smaller one. If your answer moves the wrong way, you have inverted the factor.
Mixing similar-sounding units
US and imperial gallons, pints and tons are different sizes, and decimal kilobytes differ from binary kibibytes.
Forgetting squared and cubed units
Area and volume factors are the length factor squared or cubed, so 1 m² is about 10.76 sq ft, not 3.28.
Background
Many conversion factors are exact by definition. The inch has been defined as exactly 2.54 centimetres since 1959, and the pound as exactly 0.45359237 kilograms, so conversions involving them can be as precise as you need.
Singapore adopted the metric system in the 1970s, replacing imperial units and traditional Chinese measures in most official uses. Metric units are now standard in schools, trade and government, but older units survive in property, markets and imported goods.
For everyday use, three or four significant figures are usually enough. Engineering, science and trade documents may need more, and rounding should happen only at the end of a calculation.
For any value, use the Millilitres to US fluid ounces Converter or browse all volume converters.
Run your own numbers: Millilitres to US fluid ounces Converter